1
|
Moshirfar M, Reynolds JC, Moin KA, Lim MY, Stoakes IM, Hoopes PC. Perioperative Recommendations for Corneal Refractive Surgery Patients With Inherited Bleeding Disorders. Cornea 2024:00003226-990000000-00633. [PMID: 39058250 DOI: 10.1097/ico.0000000000003631] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2024] [Accepted: 06/19/2024] [Indexed: 07/28/2024]
Abstract
PURPOSE To synthesize the current literature regarding patients with inherited bleeding disorders and suggest comprehensive evaluation and preoperative recommendations for these patients before undergoing corneal refractive surgery. METHODS The literature search was conducted through PubMed, Embase, and Google Scholar databases for publications through January 4, 2024 for reports of ocular bleeding manifestations in patients with inherited bleeding disorders and reports of patients without a history of bleeding disorders who had intraoperative or postoperative hemorrhagic complications with corneal refractive surgery. Additional cases from the literature and a retrospective chart review at a corneal practice were obtained describing patients with inherited bleeding disorders who underwent corneal refractive surgery. RESULTS Four articles were found detailing ocular bleeding manifestations in patients with inherited bleeding disorders who underwent ocular surgery other than corneal refractive surgery. Thirty articles were found detailing intraoperative and postoperative bleeding manifestations in patients without a history of inherited bleeding disorders who underwent corneal refractive surgery. Eight cases (3 patients from the literature search and 5 patients from a retrospective chart review) were found regarding patients with inherited bleeding disorders who underwent corneal refractive surgery. CONCLUSIONS For corneal refractive surgery with topical anesthesia, the perioperative risk and need for any hemostasis intervention in individuals with an inherited bleeding disorder depends on the type of disorder, status of preoperative factor level concentrations, or a prior history of bleeding. If required, clotting factor optimization should be tailored to each candidate on a case-by-case basis.
Collapse
Affiliation(s)
- Majid Moshirfar
- Hoopes Vision Research Center, Hoopes Vision, Draper, UT
- John A. Moran Eye Center, University of Utah School of Medicine, Salt Lake City, UT
- Utah Lions Eye Bank, Murray, UT
| | | | - Kayvon A Moin
- Hoopes Vision Research Center, Hoopes Vision, Draper, UT
| | - Ming Y Lim
- Division of Hematology and Hematologic Malignancies, Department of Internal Medicine, University of Utah, Salt Lake City, UT; and
| | - Isabella M Stoakes
- Hoopes Vision Research Center, Hoopes Vision, Draper, UT
- Department of Ophthalmology, Kettering Health, Dayton, OH
| | | |
Collapse
|
2
|
Yu EJ, Nejad M, Miller KM. Outcomes of Resident-Performed FS-LASIK for Myopia and Myopic Astigmatism. J Refract Surg 2021; 37:545-551. [PMID: 34388072 DOI: 10.3928/1081597x-20210428-01] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
PURPOSE To evaluate the outcomes of resident-performed femtosecond laser-assisted in situ keratomileusis (FS-LASIK). METHODS Records of 138 eyes of 69 patients treated by residents for myopia or myopic astigmatism between March 2018 and June 2020 were reviewed. All preoperative visits, procedures, and postoperative visits were supervised by attending physicians. Follow-up examinations were performed 1 day and 1 month postoperatively. Complications and enhancements were noted. Outcome measures included postoperative uncorrected distance visual acuity (UDVA), refractive accuracy, and complications. RESULTS Eighteen residents performed FS-LASIK on a median of 8 eyes (interquartile range: 1.75). Fifty-nine patients (118 eyes) returned for a 1-month postoperative examination. UDVA was 20/40 or better in 117 eyes (99%) and 20/20 or better in 108 eyes (92%). The mean preoperative spherical equivalent (SE) refractive error was -4.01 ± 1.82 diopters (D) in 138 eyes, decreasing to -0.12 ± 0.35 D at 1 month after surgery in the 102 eyes that were refracted. The SE was ±1.00 D in 100 eyes (98%) and ±0.50 D in 94 eyes (93%). The CDVA change was within one line in 100% of eyes. Intraoperative complications occurred in 5 eyes (3.62%), enhancements were performed in 3 eyes (2.17%), and postoperative complications developed in 3 eyes (2.17%). CONCLUSIONS Resident-performed FS-LASIK is relatively safe and effective in comparison to published U.S. Food and Drug Administration premarket approval studies. Early resident experience performing LASIK can improve the training of ophthalmic surgeons while simultaneously increasing patient access to laser vision correction. [J Refract Surg. 2021;37(8):545-551.].
Collapse
|
3
|
Sahay P, Bafna RK, Reddy JC, Vajpayee RB, Sharma N. Complications of laser-assisted in situ keratomileusis. Indian J Ophthalmol 2021; 69:1658-1669. [PMID: 34146007 PMCID: PMC8374806 DOI: 10.4103/ijo.ijo_1872_20] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2020] [Revised: 07/19/2020] [Accepted: 10/27/2020] [Indexed: 11/25/2022] Open
Abstract
Laser-assisted in situ keratomileusis (LASIK) is one of the most commonly performed kerato-refractive surgery globally. Since its introduction in 1990, there has been a constant evolution in its technology to improve the visual outcome. The safety, efficacy, and predictability of LASIK are well known, but complications with this procedure, although rare, are not unknown. Literature review suggests that intraoperative complications include suction loss, free cap, flap tear, buttonhole flap, decentered ablation, central island, interface debris, femtosecond laser-related complications, and others. The postoperative complications include flap striae, flap dislocation, residual refractive error, diffuse lamellar keratitis, microbial keratitis, epithelial ingrowth, refractive regression, corneal ectasia, and others. This review aims to provide a comprehensive knowledge of risk factors, clinical features, and management protocol of all the reported complications of LASIK. This knowledge will help in prevention as well as early identification and timely intervention with the appropriate strategy for achieving optimal visual outcome even in the face of complications.
Collapse
Affiliation(s)
- Pranita Sahay
- Department of Ophthalmology, Lady Hardinge Medical College, New Delhi, India
| | - Rahul Kumar Bafna
- Dr. Rajendra Prasad Centre for Ophthalmic Sciences, All India Institute of Medical Sciences, New Delhi, India
| | - Jagadesh C Reddy
- Cataract and Refractive Surgery Services, Cornea Institute, L V Prasad Eye Institute, L V Prasad Marg, Roan No-2, Banjara Hills, Hyderabad, Telangana, India
| | - Rasik B Vajpayee
- Vision Eye Institute, Royal Victorian Eye and Ear Hospital, University of Melbourne, Melbourne, Australia
| | - Namrata Sharma
- Dr. Rajendra Prasad Centre for Ophthalmic Sciences, All India Institute of Medical Sciences, New Delhi, India
| |
Collapse
|
4
|
Abstract
Myopia, also known as short-sightedness or near-sightedness, is a very common condition that typically starts in childhood. Severe forms of myopia (pathologic myopia) are associated with a risk of other associated ophthalmic problems. This disorder affects all populations and is reaching epidemic proportions in East Asia, although there are differences in prevalence between countries. Myopia is caused by both environmental and genetic risk factors. A range of myopia management and control strategies are available that can treat this condition, but it is clear that understanding the factors involved in delaying myopia onset and slowing its progression will be key to reducing the rapid rise in its global prevalence. To achieve this goal, improved data collection using wearable technology, in combination with collection and assessment of data on demographic, genetic and environmental risk factors and with artificial intelligence are needed. Improved public health strategies focusing on early detection or prevention combined with additional effective therapeutic interventions to limit myopia progression are also needed.
Collapse
|
5
|
Is Performing Femtosecond Laser–Assisted In Situ Keratomileusis on the Day of the Initial Consultation Visit Safe, Predictable and Efficacious? Eye Contact Lens 2020; 46:182-189. [DOI: 10.1097/icl.0000000000000619] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
|
6
|
Artini W, B Riyanto S, Hutauruk JA, D Gondhowiardjo T, Kekalih A. Predictive Factors for Successful High Myopia Treatment Using High-Frequency Laser- In-Situ Keratomileusis. Open Ophthalmol J 2018; 12:214-225. [PMID: 30123384 PMCID: PMC6062894 DOI: 10.2174/1874364101812010214] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2018] [Revised: 05/18/2018] [Accepted: 07/05/2018] [Indexed: 11/22/2022] Open
Abstract
Aim To evaluate the predictive factors of LASIK procedure for high myopia with or without astigmatism using a combination of high-frequency femtosecond-assisted LASIK followed by an excimer laser. Methods This study was a retrospective interventional case series study to evaluate myopic eyes undergoing high platform LASIK with FEMTO LDV Z2 intervention, followed by WaveLight®EX500 excimer laser machine. Subjects were divided into 2 groups: high myopia (SE of -6.01 to -9.00 D) and very high myopia (SE of -9.01 D or higher). Myopic eyes (Spherical Equivalent/SE) less than -13 D were included in this study. Visual Acuity (VA) was evaluated 1 day and 60 days after the procedure. Predictive factors, such as age, degree of sphere, degree of astigmatism, keratometric reading and axial length were analyzed to detect any influences affecting the final VA results. Results A total of 316 myopia eyes underwent intervention, mean age: 25.3±3.8 years. Target treatment was achieved in 96.1% of patients with high myopia and 69.9% of patients with very high myopia. High degree of sphere and astigmatism constitutes an important factor influencing final VA. Conclusion Modern machines provide a more promising efficacy and success of LASIK procedure in high myopia: important predictive factors were a high degree of sphere and astigmatism for achieving the optimal final outcome.
Collapse
Affiliation(s)
- Widya Artini
- Department of Ophthalmology, Faculty of Medicine, Universitas Indonesia, Cipto Mangunkusumo Kirana Hospital, Jakarta, Indonesia.,Jakarta Eye Center Menteng Jakarta, Jakarta, Indonesia
| | | | | | - Tjahjono D Gondhowiardjo
- Department of Ophthalmology, Faculty of Medicine, Universitas Indonesia, Cipto Mangunkusumo Kirana Hospital, Jakarta, Indonesia.,Jakarta Eye Center Menteng Jakarta, Jakarta, Indonesia
| | - Aria Kekalih
- Community Medicine Department, Faculty of Medicine, Universitas Indonesia, Jakarta, Indonesia
| |
Collapse
|
7
|
Song YW, He R, Ma JX, Koch DD, Wang L. Long-term safety of laser in situ keratomileusis in eyes with thin corneas: 5-year follow-up. Int J Ophthalmol 2018; 11:1227-1233. [PMID: 30046544 DOI: 10.18240/ijo.2018.07.25] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2017] [Accepted: 02/05/2018] [Indexed: 01/01/2023] Open
Abstract
AIM To investigate the long term (≥5y) efficacy, predictability, and safety of laser in situ keratomileusis (LASIK) in eyes with thin corneas [central corneal thickness (CCT) <500 µm]. METHODS A total of 339 patients met the criteria of this study. Finally, 175 eyes of 89 patients who had thin corneas and underwent LASIK≥5y ago returned to our clinic and included in this study. Preoperative parameters recorded included uncorrected visual acuity (UCVA), corrected distance visual acuity (CDVA), manifest refraction, CCT and corneal topography. At returning visits, in addition to visual acuity and manifest refraction, ultrasound CCT and corneal topography were performed. Optical coherence tomography was used to measure the CCT, LASIK flap thickness, and residual stromal bed thickness (RSBT). Safety index, efficacy index, percentage of eyes within ±0.5 D and ±1.0 D of refraction, percent tissue altered (PTA), and percentage stromal bed thickness (PSBT) were calculated. RESULTS The safety index was 1.09 and efficacy index was 0.99. The percentages of eyes within ±0.5 D and ±1.0 D were 71.2% and 87.7%, respectively. The mean PTA was 40%±6% (range 20% to 55%); 76 eyes (43.4%) had PTA <40% and 99 eyes (56.6%) had PTA≥40%. The mean RSBT was 303±27 µm (range 240 to 390 µm), and 2 eyes had RSBT<250 µm. The mean PSBT was 61%±9% (range 51% to 85%). No eyes developed ectasia. CONCLUSION In this cohort with the PSBT of 50% or more, LASIK is safe with follow-up for at least 5y.
Collapse
Affiliation(s)
- Yao-Wen Song
- Beijing Tongren Eye Center, Beijing Tongren Hospital, Capital Medical University, Beijing Ophthalmology and Visual Science Key Laboratory, Beijing 100730, China
| | - Rui He
- Shanxi Eye Hospital, Taiyuan 030002, Shanxi Province, China
| | - Jack X Ma
- McGovern Medical School, University of Texas Health Science Center at Houston, TX 75835, USA
| | - Douglas D Koch
- Cullen Eye Institute, Department of Ophthalmology, Baylor College of Medicine, Houston, TX 75844, USA
| | - Li Wang
- Shanxi Eye Hospital, Taiyuan 030002, Shanxi Province, China.,Cullen Eye Institute, Department of Ophthalmology, Baylor College of Medicine, Houston, TX 75844, USA
| |
Collapse
|
8
|
Garcia-Gonzalez M, Bouza-Miguens C, Parafita-Fernandez A, Gros-Otero J, Cañones-Zafra R, Villa-Collar C, Teus MA. Comparison of visual outcomes and flap morphology using 2 femtosecond-laser platforms. J Cataract Refract Surg 2018; 44:78-84. [DOI: 10.1016/j.jcrs.2017.10.041] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2017] [Revised: 10/18/2017] [Accepted: 10/20/2017] [Indexed: 10/17/2022]
|
9
|
[LenSx® femto-LASIK, FEMTO LDV Z4® femto-LASIK, and PRK : Comparison of refractive results and an analysis of complications]. Ophthalmologe 2017; 115:928-940. [PMID: 29085999 DOI: 10.1007/s00347-017-0598-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
BACKGROUND The aim of this study is to evaluate three refractive procedures: LenSx® (Alcon, Fort Worth, TX, USA) femto-laser in situ keratomileusis (LASIK), FEMTO LDV Z4® (Ziemer, Port, Switzerland) femto-LASIK, and photorefractive keratectomy (PRK) in terms of refractive outcome, perioperative complications, pain, and patient satisfaction. MATERIALS AND METHODS Data of 168 eyes (myopic n = 84) were included in this retrospective study. Of these, 54 eyes (n = 27, 33.85 ± 7.64 years) were treated with LenSx® femto-LASIK, 60 eyes (n = 30, 35.03 ± 7.46 years) with FEMTO LDV Z4® femto-LASIK, and 54 eyes (n = 27, 33.24 ± 8.52 years) with PRK. Photoablation was induced by a MEL80 Excimerlaser (Zeiss, Oberkochen, Germany). The corrected (Vsc) and uncorrected (Vcc) distance subjective visual acuity, corneal topography (Pentacam® HR; Wetzlar, Germany), and objective astigmatism (ARK-760A Refractometer ; Nidek, Fremont, CA, USA) were measured preoperatively, and 1 day, 1 week, 1 month, and 3 months postoperatively. Subjective pain (verbal rating scale) and patient satisfaction were also recorded. RESULTS Subjective Vsc showed significantly better results in both femto-LASIK cohorts compared to PRK (p < 0.05) 1 day and 1 week postoperatively. There was no significant difference between the groups in terms of spherical equivalent and astigmatism 3 months postoperatively. The LenSx® femto-LASIK caused flap complications. The highest patient satisfaction results were shown in the LDV Z4® group, followed by the LenSx® and PRK cohorts (p = 0.072). LDV Z4® femto-LASIK showed the lowest pain score 1 day postoperatively (p < 0.001). There was no significant correlation between target refraction and preoperative corneal thickness and astigmatism. DISCUSSION Femtosecond laser-assisted LASIK is an effective procedure enabling rapid rehabilitation of visual acuity with low postoperative pain compared to PRK. There is no difference between the three techniques regarding refractive outcome after 3 months follow-up. LDV Z4® femto-LASIK can be recommended, if available, due to its low intraoperative complication rate and higher patient satisfaction compared to LenSx® femto-LASIK.
Collapse
|
10
|
Zhang J, Zhou YH, Zheng Y, Liu Q. Comparison of visual performance recovery after thin-flap LASIK with 4 femtosecond lasers. Int J Ophthalmol 2017; 10:1566-1572. [PMID: 29062777 DOI: 10.18240/ijo.2017.10.14] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2016] [Accepted: 07/11/2017] [Indexed: 11/23/2022] Open
Abstract
AIM To compare the speed of visual recovery following myopic thin-flap LASIK with four femtosecond lasers. METHODS Eighty-eight eyes of 46 patients who were consecutively scheduled for bilateral LASIK with the IntraLase FS60 (Group 1), Femto LDV Crystal Line (Group 2), Wavelight FS200 (Group 3) and VisuMax (Group 4) femtosecond lasers were enrolled in. Monocular uncorrected distance visual acuity (UDVA), best-corrected distant visual acuity (CDVA), refraction, contrast sensitivity and higher-order aberrations (HOAs) were evaluated at 1, 3d, 1wk and 1mo postoperatively. RESULTS Sixteen eyes (72.7%) achieved 20/16 and 8 eyes (36.4%) were 20/12.5 at 1d in Group 2, which was significantly more than other 3 groups. At 1wk, 20 eyes (90.9%) achieved 20/16 in Groups 2 and 4. At 1mo, 20 eyes (90.9%) achieved 20/16 in Group 2 and Group 4, which were significantly more than other two groups. While by 1 mo, the difference of the residual spherical equivalent (SE) was not statistically significant among 4 groups (P=0.121). The induction of spherical aberration (SA) were significantly less for Groups 2, 3, 4 than for Group 1 one day after surgery (P=0.015). The differences among 4 groups were not statistically significant before and after surgery on every time points (all P>0.05). CONCLUSION The thin-flap LASIK procedure using the Femto LDV Crystal Line and VisuMax femtosecond laser show faster visual performance recovery.
Collapse
Affiliation(s)
- Jing Zhang
- Beijing Tongren Eye Center, Beijing Key Laboratory of Ophthalmology and Visual Science, Beijing Tongren Hospital, Capital Medical University, Beijing 100730, China
| | - Yue-Hua Zhou
- Beijing Tongren Eye Center, Beijing Key Laboratory of Ophthalmology and Visual Science, Beijing Tongren Hospital, Capital Medical University, Beijing 100730, China
| | - Yan Zheng
- Beijing Tongren Eye Center, Beijing Key Laboratory of Ophthalmology and Visual Science, Beijing Tongren Hospital, Capital Medical University, Beijing 100730, China
| | - Qian Liu
- Beijing Tongren Eye Center, Beijing Key Laboratory of Ophthalmology and Visual Science, Beijing Tongren Hospital, Capital Medical University, Beijing 100730, China
| |
Collapse
|
11
|
Visumax femtolasik versus Moria M2 microkeratome in mild to moderate myopia: efficacy, safety, predictability, aberrometric changes and flap thickness predictability. BMC Ophthalmol 2017; 17:125. [PMID: 28716114 PMCID: PMC5512974 DOI: 10.1186/s12886-017-0520-5] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2016] [Accepted: 07/10/2017] [Indexed: 12/03/2022] Open
Abstract
Introduction This is an interventional prospective clinical study which was conducted to evaluate the efficacy, safety, predictability, ocular aberrations, and flap thickness predictability of Visumax femtosecond laser (FSL) compared to Moria M2 microkeratome (MK) in mild to moderate myopia. Methods This study included 60 eyes who were divided into two groups. Thirty eyes in group (I) in which the flap was created with Visumax FSL, while in group II (30 eyes) the Moria M2 MK was used. Keratometric, refractive, and aberrometric measurements were compared preoperatively and 3 months postoperatively. The intraoperative subtraction pachymetry (the SP 100 Handy pachymeter (Tomey, Nagoya, Japan) was used for preoperative pachymetry and flap thickness measurement. Results No significant difference was found between the two groups in regards to postoperative manifest sphere, spherical equivalent, astigmatism, safety indices nor ocular aberrations. Twenty six eyes (86.6%) in group I and 23 eyes in group II (76.6%) were within ±0.5D of the intended correction and 23 eyes (76.6%) in group I and 15 eyes in group II (50%) were within ±0.25D of the intended correction. In group I, the mean postoperative actual flap thickness was 100.12 ± 16.1 μm (81 to 122 μm), while in group II, it was 104.6 ± 20.1 μm (62 to 155 μm). The difference was statistically significant (p = 0.001). Conclusions Both Visumax and Moria M2 MK are safe and effective in treating myopia with no statistically significant difference in induction of ocular aberrations but with potential advantage for Visumax regarding predictability. More accurate flap thickness is achieved with Visumax femtolasik. Trial registration This study was retrospectively registered on 19/6/2017. Trial registration number NCT03193411, clinicalTrials.gov.
Collapse
|
12
|
Cummings A, Durrie D, Gordon M, Williams R, Gow JA, Maus M. Prospective Evaluation of Outcomes in Patients Undergoing Treatment for Myopia Using the WaveLight Refractive Suite. J Refract Surg 2017; 33:322-328. [DOI: 10.3928/1081597x-20160926-01] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2016] [Accepted: 08/18/2016] [Indexed: 11/20/2022]
|
13
|
Comparison of femtosecond and excimer laser platforms available for corneal refractive surgery. Curr Opin Ophthalmol 2016; 27:316-22. [PMID: 27031540 DOI: 10.1097/icu.0000000000000268] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
PURPOSE OF REVIEW The evolution of laser technology has left today's refractive surgeon with a choice between multiple laser platforms. The purpose of this review is to compare currently available femtosecond and excimer laser platforms, providing a summary of current evidence. RECENT FINDINGS Femtosecond lasers create LASIK flaps with better accuracy, uniformity, and predictability than mechanical microkeratomes. Newer higher-frequency femtosecond platforms elicit less inflammation, producing better visual outcomes. SMILE achieved similar safety, efficacy, and predictability as LASIK with greater preservation of corneal nerves and biomechanical strength. The emergence of wavefront technology has resulted in improved excimer laser treatments. Comparisons of wavefront-guided and wavefront-optimized treatments suggest that there is an advantage to using wavefront-guided platforms in terms of visual acuity and quality of vision. Topography-guided ablations are another well tolerated and effective option, especially in eyes with highly irregular corneas. SUMMARY Advances in femtosecond and excimer laser technology have not only improved the safety and efficacy of refractive procedures, but have also led to the development of promising new treatment modalities, such as SMILE and the use of wavefront-guided and topography-guided ablation. Future studies and continued technological progress will help to better define the optimal use of these treatment platforms.
Collapse
|
14
|
Meidani A, Tzavara C. Comparison of efficacy, safety, and predictability of laser in situ keratomileusis using two laser suites. Clin Ophthalmol 2016; 10:1639-46. [PMID: 27601880 PMCID: PMC5003563 DOI: 10.2147/opth.s110626] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
Abstract
Purpose The main aim of this study was to compare the efficacy, safety, and predictability of femtosecond laser-assisted in situ keratomileusis performed by two different laser suites in the treatment of myopia for up to 6 months. Methods In this two-site retrospective nonrandomized study, myopic eyes that underwent laser-assisted in situ keratomileusis using IntraLase FS 60 kHz formed group 1 and those using WaveLight FS200 femtosecond laser system formed group 2. Ablation was performed with Visx Star S4 IR and WaveLight EX500 Excimer lasers, respectively, in groups 1 and 2. Both groups were well matched for age, sex, and mean level of preoperative refractive spherical equivalent (MRSE). Uncorrected distance visual acuity, corrected distance visual acuity, and MRSE were evaluated preoperatively and at 1 week, 1 month, and 6 months after treatment. Results Fifty-six eyes of 28 patients were included in the study. At 6-month follow-up postop, 78.6% of eyes in group 1 and 92.8% of eyes in group 2 achieved an uncorrected distance visual acuity of 20/20 or better (P=0.252). 35.7% and 50% in group 1 and group 2, respectively, gained one line (P=0.179). No eye lost lines of corrected distance visual acuity. Twenty-five eyes in group 1 (92.7%) and 27 eyes in group 2 (96.3%) had MRSE within ±0.5 D in the 6-month follow-up (P>0.999). The mean efficacy index at 6 months was similar in group 1 and group 2 (mean 1.10±0.12 [standard deviation] vs 1.10±0.1) (P=0.799). The mean safety index was similar in group 1 and group 2 (mean 1.10±0.10 [standard deviation] vs 1.10±0.09) (P=0.407). Conclusion: The outcomes were excellent between the two laser suites. There were no significant differences at 6-month follow-up postop between the two laser systems.
Collapse
Affiliation(s)
- Alexandra Meidani
- Hypervision Laser Centre; Eye Day Clinic; Department of Hygiene, University of Athens Medical School, Centre for Health Services Research, Epidemiology and Medical Statistics, Athens, Greece
| | - Chara Tzavara
- Department of Hygiene, University of Athens Medical School, Centre for Health Services Research, Epidemiology and Medical Statistics, Athens, Greece
| |
Collapse
|
15
|
Shen Z, Shi K, Yu Y, Yu X, Lin Y, Yao K. Small Incision Lenticule Extraction (SMILE) versus Femtosecond Laser-Assisted In Situ Keratomileusis (FS-LASIK) for Myopia: A Systematic Review and Meta-Analysis. PLoS One 2016; 11:e0158176. [PMID: 27367803 PMCID: PMC4930219 DOI: 10.1371/journal.pone.0158176] [Citation(s) in RCA: 60] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2016] [Accepted: 06/11/2016] [Indexed: 11/24/2022] Open
Abstract
PURPOSE The goal of this study was to compare small incision lenticule extraction (SMILE) with femtosecond laser-assisted in situ keratomileusis (FS-LASIK) for treating myopia. METHODS The CENTRAL, EMBASE, PubMed databases and a Chinese database (SinoMed) were searched in May of 2016. Twelve studies with 1,076 eyes, which included three randomized controlled trials (RCTs) and nine cohorts, met our inclusion criteria. The overall quality of evidence was evaluated using the Grading of Recommendations Assessment, Development and Evaluation (GRADE) working group framework. Data were extracted and analysed at three to six months postoperatively. Primary outcome measures included a loss of one or more lines of best spectacle corrected visual acuity (BSCVA), uncorrected visual acuity (UCVA) of 20/20 or better, mean logMAR UCVA, postoperative mean spherical equivalent (SE) and postoperative refraction within ±1.0 D of the target refraction. Secondary outcome measures included ocular surface disease index (OSDI), tear breakup time (TBUT) and Schirmer's 1 test (S1T) as dry eye parameters, along with corneal sensitivity. RESULTS The overall quality of evidence was considered to be low to very low. Pooled results revealed no significant differences between the two groups with regard to a loss of one or more lines in the BSCVA (OR 1.71; 95% CI: 0.81, 3.63; P = 0.16), UCVA of 20/20 or better (OR 0.71; 95% CI: 0.44, 1.15; P = 0.16), logMAR UCVA (MD 0.00; 95% CI: -0.03, 0.04; P = 0.87), postoperative refractive SE (MD -0.00; 95% CI: -0.05, 0.05; P = 0.97) or postoperative refraction within ±1.0 D of the target refraction (OR 0.78; 95% CI: 0.22, 2.77; P = 0.70) within six months postoperatively. The pooled analysis also indicated that the FS-LASIK group suffered more severely from dry eye symptoms (OSDI; MD -6.68; 95% CI: -11.76, -2.00; P = 0.006) and lower corneal sensitivity (MD 12.40; 95% CI: 10.23, 14.56; P < 0.00001) at six months postoperatively. CONCLUSIONS In conclusion, both FS-LASIK and SMILE are safe, effective and predictable surgical options for treating myopia. However, dry eye symptoms and loss of corneal sensitivity may occur less frequently after SMILE than after FS-LASIK.
Collapse
Affiliation(s)
- Zeren Shen
- Eye Center, Second Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, China
| | - Keda Shi
- Department of Gastroenterology, First Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, China
| | - Yinhui Yu
- Eye Center, Second Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, China
| | - Xiaoning Yu
- Eye Center, Second Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, China
| | - Yuchen Lin
- Eye Center, Second Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, China
| | - Ke Yao
- Eye Center, Second Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, China
| |
Collapse
|
16
|
Huhtala A, Pietilä J, Mäkinen P, Uusitalo H. Femtosecond lasers for laser in situ keratomileusis: a systematic review and meta-analysis. Clin Ophthalmol 2016; 10:393-404. [PMID: 27022236 PMCID: PMC4788361 DOI: 10.2147/opth.s99394] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/03/2022] Open
Abstract
Purpose The aim of this study was to review and meta-analyze whether there are differences between reported femtosecond (FS) lasers for laser-assisted in situ keratomileusis (LASIK) in terms of efficacy, predictability, and safety as primary outcomes and corneal flap thickness measurements and pre- and postoperative complications as secondary outcomes. Methods A comprehensive literature search of PubMed, Science Direct, Scopus, and Cochrane CENTRAL Trials Library databases was conducted to identify the relevant prospective randomized controlled trials of FS lasers for LASIK. Thirty-one articles describing a total of 5,404 eyes were included. Results Based on efficacy, IntraLase FS 10 and 30 kHz gave the best results. Based on predictability and safety, there were no differences between various FS lasers. FEMTO LDV and IntraLase FS 60 kHz produced the most accurate flap thicknesses. IntraLase and Wavelight SF200 had the fewest intraoperative complications. IntraLase, Visumax, and Wavelight FS200 had the most seldom postoperative complications. Conclusion There were dissimilarities between different FS lasers based on efficacy and intraoperative and postoperative complications. All FS lasers were predictable and safe for making corneal flaps in LASIK.
Collapse
Affiliation(s)
- Anne Huhtala
- Silmäasema Eye Hospital, School of Medicine, School of Medicine, University of Tampere, Tampere, Finland
| | - Juhani Pietilä
- Silmäasema Eye Hospital, School of Medicine, School of Medicine, University of Tampere, Tampere, Finland; SILK, Department of Ophthalmology, School of Medicine, University of Tampere, Tampere, Finland
| | - Petri Mäkinen
- Silmäasema Eye Hospital, School of Medicine, School of Medicine, University of Tampere, Tampere, Finland; SILK, Department of Ophthalmology, School of Medicine, University of Tampere, Tampere, Finland
| | - Hannu Uusitalo
- Silmäasema Eye Hospital, School of Medicine, School of Medicine, University of Tampere, Tampere, Finland; SILK, Department of Ophthalmology, School of Medicine, University of Tampere, Tampere, Finland; TAUH Eye Center, Tampere University Hospital, Tampere, Finland
| |
Collapse
|
17
|
Abstract
Femtosecond-assisted laser in-situ keratomileusis flaps have revolutionized refractive surgery since their introduction. Although these lasers are exceedingly safe, complications still do occur. This review focuses specifically on examining the literature and evidence for flap complications during femtosecond-assisted laser in-situ keratomileusis as well as their management.
Collapse
Affiliation(s)
- Deepika N Shah
- Department of Ophthalmology, Massachusetts Eye and Ear Infirmary, Harvard Medical School , Boston, Massachusetts , USA
| | | |
Collapse
|
18
|
|
19
|
Mastropasqua L, Calienno R, Lanzini M, Colasante M, Mastropasqua A, Mattei PA, Nubile M. Evaluation of corneal biomechanical properties modification after small incision lenticule extraction using Scheimpflug-based noncontact tonometer. BIOMED RESEARCH INTERNATIONAL 2014; 2014:290619. [PMID: 25309907 PMCID: PMC4163343 DOI: 10.1155/2014/290619] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/08/2014] [Accepted: 08/07/2014] [Indexed: 11/17/2022]
Abstract
PURPOSE To quantify the effect of small incision lenticule extraction (SMILE) on the corneal biomechanics using Scheimpflug noncontact tonometer (Corvis ST). METHODS Twenty eyes of twenty patients, evaluated as eligible for surgery, with high myopia and/or moderate myopic astigmatism, underwent small incision lenticule extraction (SMILE). All patients underwent Corvis ST preoperatively and postoperatively after 1 week, and 1 and 3 months to observe alterations of corneal biomechanical properties. The main outcome measures were Deformation Amplitude, 1st-AT, and 2nd-AT. The relationship between the amount of stroma removed and the percentage variation of the measured parameters from baseline was evaluated with generalized linear model from each time point. For completeness also intraocular pressure (IOP), central corneal thickness (CCT), and their variations after surgery were evaluated. RESULTS The ratio between the amount of removed refractive error and, respectively, changes of Deformation Amplitude, 1st-AT, and 2nd-AT were significantly modified at the 1st week after surgery (P = 0.005; P = 0.001; P = 0.024). At 1 and 3 months these values did not show statistically significant alterations. Intraocular pressure and central corneal thickness showed statistically significant changes during follow-up. CONCLUSIONS No significant modifications in biomechanical properties were observed after SMILE so this procedure could induce only minimal transient alterations of corneal biomechanics.
Collapse
Affiliation(s)
- Leonardo Mastropasqua
- Ophthalmic Clinic, University “G d'Annunzio” of Chieti-Pescara, Via dei Vestini, 66100 Chieti, Italy
| | - Roberta Calienno
- Ophthalmic Clinic, University “G d'Annunzio” of Chieti-Pescara, Via dei Vestini, 66100 Chieti, Italy
| | - Manuela Lanzini
- Ophthalmic Clinic, University “G d'Annunzio” of Chieti-Pescara, Via dei Vestini, 66100 Chieti, Italy
| | - Martina Colasante
- Ophthalmic Clinic, University “G d'Annunzio” of Chieti-Pescara, Via dei Vestini, 66100 Chieti, Italy
| | | | - Peter A. Mattei
- Ophthalmic Clinic, University “G d'Annunzio” of Chieti-Pescara, Via dei Vestini, 66100 Chieti, Italy
| | - Mario Nubile
- Ophthalmic Clinic, University “G d'Annunzio” of Chieti-Pescara, Via dei Vestini, 66100 Chieti, Italy
| |
Collapse
|
20
|
Vestergaard AH. Past and present of corneal refractive surgery: a retrospective study of long-term results after photorefractive keratectomy and a prospective study of refractive lenticule extraction. Acta Ophthalmol 2014; 92 Thesis 2:1-21. [PMID: 24636364 DOI: 10.1111/aos.12385] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
UNLABELLED Surgical correction of refractive errors is becoming increasingly popular. In the 1990s, the excimer laser revolutionized the field of corneal refractive surgery with PRK and LASIK, and lately refractive lenticule extraction (ReLEx) of intracorneal tissue, using only a femtosecond laser, has become possible. Two new procedures were developed, ReLEx flex (FLEX) and ReLEx smile (SMILE). Until this thesis, only a few long-term studies of PRK with a relatively limited number of patients had been published; therefore, this thesis intended to retrospectively evaluate long-term outcomes after PRK for all degrees of myopia for a large number of patients. Furthermore, a prospective contralateral eye study comparing FLEX and SMILE, when treating high to moderate degrees of myopia, had not been performed prior to this study. This was the second aim of this thesis. In the first study, results from 160 PRK patients (289 eyes) were presented. Preoperative spherical equivalent ranged from -1.25 to -20.25 D, with 78% having low myopia (<-6 D). Average follow-up time was 16 years (range 13-19 years), making this the longest published follow-up study on PRK patients. Outcomes from eyes with low myopia were generally superior to outcomes from eyes with high myopia, at final follow-up. Seventy-two percent were within ± 1.00 D of target refraction, as compared to 47% of eyes with high myopia. However, results from a subgroup of unilateral treated PRK patients indicated that refraction at final follow-up was affected by myopic progression. Fifty percent of eyes with low myopia had uncorrected 20/20 distance visual acuity or better, as compared to 22% of eyes with high myopia. Haze did not occur if attempted corrections were <-4 D, and only eyes with high myopia lost two lines or more of CDVA (corrected distance visual acuity). Eighty-one per cent were satisfied or very satisfied with their surgery. CONCLUSION The results support the continued use of the excimer laser for corneal surface ablation as a treatment option for correction of low degrees of myopia, and as the treatment of choice for subgroups of refractive patients (thin corneas, etc.). The results also highlight that treatment of higher degrees of myopia with standard PRK should only be done today under special circumstances, due to low refractive predictability, and high risk of corneal haze. Technological advances since then should be taken into account when comparing these results with contemporary techniques. In the second study, 35 patients were randomized to receive FLEX in one eye and SMILE in the other. Preoperative spherical equivalent refraction ranged from -6 to -10 D with low degrees of astigmatism. A total of 34 patients completed the 6 month follow-up period. Refractive and visual outcomes were very similar for the two methods, as well as tear film measurements and changes in corneal biomechanics. Ninety-seven percent were within ± 1.00 D of target refraction, no eyes lost two lines or more of CDVA, and contrast sensitivity was unaffected after both procedures. The changes in higher-order aberrations were also very similar. There were also no differences in tear film parameters 6 months after surgery, although less postoperative foreign body sensation was reported within the first week after surgery in SMILE eyes. Corneal sublayer pachymetry measurements demonstrated equally increased epithelial thickness 6 months after surgery. Contrary to expectations, it was not possible to measure the theoretical biomechanical advantages of a small corneal incision in SMILE as compared to a corneal flap in FLEX. The main differences between FLEX and SMILE were found when the corneal nerves and intraoperative complications were evaluated. Thus, corneal sensitivity was better preserved and corneal nerve morphology was less affected after SMILE, but intraoperative complications occurred more frequently, although without visual sequela. Finally, 97% were satisfied or very satisfied with both their surgeries. CONCLUSION The results support the continued use of both FLEX and SMILE for treatment of up to high degrees of myopia. Overall, refractive and visual results for both procedures were good and similar, but from a biological point of view, the less invasive SMILE technique is more attractive, as demonstrated in this study, despite being slightly more surgically demanding than FLEX.
Collapse
Affiliation(s)
- Anders Højslet Vestergaard
- Faculty of Health Science; University of Southern Denmark; Odense Denmark
- Department of Ophthalmology; Odense University Hospital; Odense Denmark
| |
Collapse
|
21
|
Patient and surgeon experience during laser in situ keratomileusis using 2 femtosecond laser systems. J Cataract Refract Surg 2014; 40:423-9. [PMID: 24461333 DOI: 10.1016/j.jcrs.2013.08.056] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2013] [Revised: 08/06/2013] [Accepted: 08/07/2013] [Indexed: 11/22/2022]
Abstract
PURPOSE To describe the subjective experience of patients and surgeons during laser in situ keratomileusis (LASIK) using the Intralase 60 kHz or the Visumax 500 kHz femtosecond laser. SETTING Singapore National Eye Centre, Singapore. DESIGN Prospective randomized clinical study. METHODS In myopic patients, LASIK was performed with the corneal flap created using the 60 kHz laser in 1 eye and the 500 kHz laser in the contralateral eye. Postoperatively, patients completed a standardized validated questionnaire about their subjective intraoperative experiences (eg, light perception, pain, fear). Surgeons reported their intraoperative experiences and preferences. RESULTS Loss of light perception occurred in 50.0% of 60 kHz laser cases and 0% of 500 kHz laser cases during docking and in 63.0% and 0% of cases, respectively, during laser flap creation (P < .0001). The mean pain score with the 60 kHz laser was significantly higher during docking (P < .0001) but not during laser flap cutting (P = .006). Subconjunctival hemorrhage occurred in 67.4% of eyes with the 60 kHz laser and in 2.2% of eyes with the 500 kHz laser (P < .0001). The 500 kHz laser was preferred by 78.3% of patients, while 21.7% preferred the 60 kHz laser (P < .0001). The surgeons preferred the 60 kHz laser in 50.0% of cases and the 500 kHz laser in 8.7% (P < .0001); 41.3% had no preference. CONCLUSIONS Patients preferred surgery with the 500 kHz laser with no loss of light perception, less pain, less fear, and less subconjunctival hemorrhage. Surgeons preferred the 60 kHz laser.
Collapse
|
22
|
Petznick A, Chew A, Hall RC, Chan CM, Rosman M, Tan D, Tong L, Mehta JS. Comparison of corneal sensitivity, tear function and corneal staining following laser in situ keratomileusis with two femtosecond laser platforms. Clin Ophthalmol 2013; 7:591-8. [PMID: 23576858 PMCID: PMC3616690 DOI: 10.2147/opth.s42266] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
Abstract
Purpose To evaluate longitudinal changes in corneal sensitivity, tear function, and corneal staining in patients who underwent laser in situ keratomileusis (LASIK) using two different femtosecond lasers. Methods In a prospective, randomized clinical trial, contralateral eyes of 45 patients underwent flap creation by either VisuMax or IntraLase™ femtosecond laser. Corneal sensitivity, tear break up time (TBUT), Schirmer’s test, and corneal fluorescein staining were assessed preoperatively and at 1 week, 1 month, and 3 months postoperatively. Results There were no statistical differences in any clinical outcome measure between the two femtosecond lasers (P > 0.05), although there was a trend towards slightly lower reductions for corneal sensitivity and TBUT in VisuMax-operated eyes. Overall, corneal sensitivity was significantly reduced at 1 week (P < 0.05), 1 month (P < 0 .001), and 3 months (P < 0.001) postoperatively. A significantly greater reduction of corneal sensitivity was noted in eyes with a myopic spherical equivalent of −6.00 diopters (D) to −11.25 D as compared with eyes that had a relatively lower level of myopia of less than −6.00 D (P < 0.001). TBUT and Schirmer’s test values were significantly diminished at 1 week postoperatively (P < 0.04). Overall, corneal staining was significantly increased at 1 week postoperatively (P < 0.001). The level of myopia did not significantly affect postoperative changes in TBUT, Schirmer’s test values, or corneal staining (P > 0.05). Conclusion This study showed that changes in corneal sensitivity, tear function, and corneal staining were statistically similar in LASIK using VisuMax and IntraLase femtosecond lasers for flap creation. However, the trend towards faster recovery of corneal sensitivity and TBUT observed in VisuMax-operated eyes may be attributable to improved technical specifications.
Collapse
|