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Khanjian AT, Khodzhabekyan NV, Tarutta EP, Harutyunyan SG, Milash SV. [Changes in the wavefront and peripheral defocus profile after excimer laser and orthokeratology corneal reshaping in myopia]. Vestn Oftalmol 2023; 139:87-92. [PMID: 38235634 DOI: 10.17116/oftalma202313906187] [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: 01/19/2024]
Abstract
PURPOSE This study compares the trends of changes in corneal asphericity, corneal and total aberrations and peripheral refraction in myopic eyes after excimer laser and orthokeratology correction. MATERIAL AND METHODS Aberrometry (OPD-Scan III; Nidek, Japan) was performed in 63 patients (126 eyes) with moderate and high myopia before and after femtosecond laser-assisted in situ keratomileusis (Femto-LASIK; 88 eyes, group 1) and photorefractive keratectomy (PRK; 38 eyes, group 2). Peripheral refraction (Grand Seiko AutoRef/Keratometer) at 15° and 30° from the center of the fovea was observed in 12 patients of group 1 and in 18 patients with a background of orthokeratology correction (group 3). RESULTS Corneal asphericity factor Q transitioned to positive values after PRK and Femto-LASIK. Corneal aberrations: root mean square higher order aberration (RMS HOA) increased in both groups, Tilt 1 increased in group 1 and became negative in group 2, Tilt 2 increased in group 2 and went negative in group 1. Trefoil 6 did not change in group 1 and decreased in group 2. Coma 7 and 8 increased synchronously in both groups. Spherical aberrations (SA) increased in group 1, and went negative in group 2. Total aberrations changed to a lower degree, and these changes were not synchronous with the corneal ones; RMS HOA decreased in group 1 (while corneal RMS increased significantly), and in the PRK group it increased, but much less than the corneal. Total SA increased in group 1 and did not change in group 2. Peripheral myopic defocus formed in all cases, after Femto-LASIK the maximum was in the zone of 30º, after orthokeratology lenses - in the zone of 15º. CONCLUSION Using excimer laser and orthokeratology to reshape the cornea in full accordance with its different profiles have different effects on the wavefront and peripheral refraction of the eye. The internal optics of the eye partially compensates corneal aberrations induced by the excimer laser.
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Affiliation(s)
- A T Khanjian
- Helmholtz National Medical Research Center of Eye Disease, Moscow, Russia
| | - N V Khodzhabekyan
- Helmholtz National Medical Research Center of Eye Disease, Moscow, Russia
| | - E P Tarutta
- Helmholtz National Medical Research Center of Eye Disease, Moscow, Russia
| | - S G Harutyunyan
- Helmholtz National Medical Research Center of Eye Disease, Moscow, Russia
| | - S V Milash
- Helmholtz National Medical Research Center of Eye Disease, Moscow, Russia
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Comparison of Methods for Estimating Retinal Shape: Peripheral Refraction vs. Optical Coherence Tomography. J Clin Med 2021; 10:jcm10020174. [PMID: 33419003 PMCID: PMC7825350 DOI: 10.3390/jcm10020174] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2020] [Revised: 01/02/2021] [Accepted: 01/04/2021] [Indexed: 12/13/2022] Open
Abstract
Retinal shape presents a clinical parameter of interest for myopia, and has commonly been inferred indirectly from peripheral refraction (PRX) profiles. Distortion-corrected optical coherence tomography (OCT) scans offer a new and direct possibility for retinal shape estimation. The current study compared retinal curvatures derived from OCT scans vs. PRX measurements in three refractive profiles (0° and 90° meridians, plus spherical equivalent) for 25 participants via Bland–Altman analysis. The radial differences between both procedures were correlated to axial length using Pearson correlation. In general, PRX- and OCT-based retinal radii showed low correlation (all intraclass correlation coefficients < 0.21). PRX found flatter retinal curvatures compared to OCT, with the highest absolute agreement found with the 90° meridian (mean difference +0.08 mm) and lowest in the 0° meridian (mean difference +0.89 mm). Moreover, a negative relation between axial length and the agreement of both methods was detected especially in the 90° meridian (R = −0.38, p = 0.06). PRX measurements tend to underestimate the retinal radius with increasing myopia when compared to OCT measurements. Therefore, future conclusions from PRX on retinal shape should be made cautiously. Rather, faster and more clinically feasible OCT imaging should be performed for this purpose.
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Measurement of the peripheral aberrations of human eyes: A comprehensive review. NANOTECHNOLOGY AND PRECISION ENGINEERING 2020. [DOI: 10.1016/j.npe.2020.05.001] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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Wolffsohn JS, Kollbaum PS, Berntsen DA, Atchison DA, Benavente A, Bradley A, Buckhurst H, Collins M, Fujikado T, Hiraoka T, Hirota M, Jones D, Logan NS, Lundström L, Torii H, Read SA, Naidoo K. IMI - Clinical Myopia Control Trials and Instrumentation Report. Invest Ophthalmol Vis Sci 2019; 60:M132-M160. [PMID: 30817830 DOI: 10.1167/iovs.18-25955] [Citation(s) in RCA: 86] [Impact Index Per Article: 17.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
Abstract
The evidence-basis based on existing myopia control trials along with the supporting academic literature were reviewed; this informed recommendations on the outcomes suggested from clinical trials aimed at slowing myopia progression to show the effectiveness of treatments and the impact on patients. These outcomes were classified as primary (refractive error and/or axial length), secondary (patient reported outcomes and treatment compliance), and exploratory (peripheral refraction, accommodative changes, ocular alignment, pupil size, outdoor activity/lighting levels, anterior and posterior segment imaging, and tissue biomechanics). The currently available instrumentation, which the literature has shown to best achieve the primary and secondary outcomes, was reviewed and critiqued. Issues relating to study design and patient selection were also identified. These findings and consensus from the International Myopia Institute members led to final recommendations to inform future instrumentation development and to guide clinical trial protocols.
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Affiliation(s)
- James S Wolffsohn
- Ophthalmic Research Group, Aston University, Birmingham, United Kingdom
| | - Pete S Kollbaum
- Indiana University, School of Optometry, Bloomington, Indiana, United States
| | - David A Berntsen
- The Ocular Surface Institute, College of Optometry, University of Houston, Houston, Texas, United States
| | - David A Atchison
- School of Optometry and Vision Science, Institute of Health and Biomedical Innovation, Queensland University of Technology, Australia
| | | | - Arthur Bradley
- Indiana University, School of Optometry, Bloomington, Indiana, United States
| | - Hetal Buckhurst
- School of Health Professions, Peninsula Allied Health Centre, Plymouth University, Plymouth, United Kingdom
| | - Michael Collins
- School of Optometry and Vision Science, Institute of Health and Biomedical Innovation, Queensland University of Technology, Australia
| | - Takashi Fujikado
- Department of Applied Visual Science, Osaka University Graduate School of Medicine, Osaka, Japan
| | - Takahiro Hiraoka
- Department of Ophthalmology, Faculty of Medicine, University of Tsukuba, Ibaraki, Japan
| | - Masakazu Hirota
- Department of Applied Visual Science, Osaka University Graduate School of Medicine, Osaka, Japan
| | - Debbie Jones
- School of Optometry and Vision Science, University of Waterloo, Waterloo, Ontario, Canada
| | - Nicola S Logan
- Ophthalmic Research Group, Aston University, Birmingham, United Kingdom
| | | | - Hidemasa Torii
- Department of Ophthalmology, Keio University School of Medicine, Tokyo, Japan
| | - Scott A Read
- School of Optometry and Vision Science, Institute of Health and Biomedical Innovation, Queensland University of Technology, Australia
| | - Kovin Naidoo
- African Vision Research Institute, University of KwaZulu-Natal, Durban, South Africa
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Sella S, Duvdevan-Strier N, Kaiserman I. Unilateral Refractive Surgery and Myopia Progression. J Pediatr Ophthalmol Strabismus 2019; 56:78-82. [PMID: 30889260 DOI: 10.3928/01913913-20181212-02] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/06/2018] [Accepted: 10/29/2018] [Indexed: 11/20/2022]
Abstract
PURPOSE To compare the progression of myopia in eyes that underwent unilateral refractive surgery with non-operated eyes. METHODS Three patients who underwent refractive myopic correction in one eye are described. The collected preoperative and postoperative data included age, gender, subjective refraction, best corrected visual acuity, and uncorrected visual acuity. RESULTS The first patient (19-year-old woman) had photorefractive keratectomy in her left eye and the myopic progression was 1.20 diopters (D) (3 years postoperatively) compared to -2.50 D in her non-operated eye. The second patient (30-year-old man) had laser-assisted in situ keratomileusis in his left eye with a myopic progression of 0.25 D compared to 0.75 D in his non-operated eye (10 years postoperatively). The third patient (22-year-old man) underwent photorefractive keratectomy in his right eye with no myopic progression compared to -1.50 D in his non-operated eye (3 years postoperatively). CONCLUSIONS These three cases suggest that refractive surgery for myopia correction may be associated with a slower progression of myopia postoperatively. [J Pediatr Ophthalmol Strabismus. 2019;56(2):78-82.].
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Queirós A, Amorim-de-Sousa A, Lopes-Ferreira D, Villa-Collar C, Gutiérrez ÁR, González-Méijome JM. Relative peripheral refraction across 4 meridians after orthokeratology and LASIK surgery. EYE AND VISION 2018; 5:12. [PMID: 29796404 PMCID: PMC5960502 DOI: 10.1186/s40662-018-0106-1] [Citation(s) in RCA: 36] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/19/2017] [Accepted: 05/05/2018] [Indexed: 12/19/2022]
Abstract
Background To characterize the axial and off-axis refraction across four meridians of the retina in myopic eyes before and after Orthokeratology (OK) and LASIK surgery. Methods Sixty right eyes with a spherical equivalent (M) between − 0.75 to − 5.25 D (cylinder <− 1.00 D) underwent LASIK (n = 26) or OK (n = 34) to treat myopia. Axial and off-axis refraction were measured with an open-field autorefractometer before and after stabilized treatments. Off-axis measurements were obtained for the horizontal (35° nasal and temporal retina) and vertical (15° superior and inferior retina) meridians, and for two oblique directions (45–225° and 135–315°) up to 20° of eccentricity. The refractive profile was addressed as relative peripheral refractive error (RPRE). Results OK and LASIK post-treatment results showed an increase of myopic relative refraction at several eccentric locations. At the four meridians evaluated, the M component of the pre-treatment RPRE values was not statistically different (p > 0.05) from the post-treatment RPRE within 30° and 20° of the central visual field after LASIK and OK, respectively. These results demonstrated that the treatment zone warrants an optimal central field of vision. Conclusions The present study gives an overview of RPRE after refractive corneal reshaping treatments (OK and LASIK) across vertical, horizontal and two oblique meridians together. This allows a 3D representation of RPRE at the retina and shows that the myopic shift induced by both treatments is more relevant in horizontal directions.
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Affiliation(s)
- António Queirós
- 1Clinical & Experimental Optometry Research Lab-CEORLab, Center of Physics (Optometry), University of Minho, Braga, Portugal
| | - Ana Amorim-de-Sousa
- 1Clinical & Experimental Optometry Research Lab-CEORLab, Center of Physics (Optometry), University of Minho, Braga, Portugal
| | - Daniela Lopes-Ferreira
- 1Clinical & Experimental Optometry Research Lab-CEORLab, Center of Physics (Optometry), University of Minho, Braga, Portugal
| | - César Villa-Collar
- 2Department of Optics and Optometry, European University of Madrid, Madrid, Spain
| | | | - José Manuel González-Méijome
- 1Clinical & Experimental Optometry Research Lab-CEORLab, Center of Physics (Optometry), University of Minho, Braga, Portugal
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González-Méijome JM, Carracedo G, Lopes-Ferreira D, Faria-Ribeiro MA, Peixoto-de-Matos SC, Queirós A. Stabilization in early adult-onset myopia with corneal refractive therapy. Cont Lens Anterior Eye 2016; 39:72-7. [DOI: 10.1016/j.clae.2015.06.009] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2014] [Revised: 06/02/2015] [Accepted: 06/30/2015] [Indexed: 12/29/2022]
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González-Méijome JM, Faria-Ribeiro MA, Lopes-Ferreira DP, Fernandes P, Carracedo G, Queiros A. Changes in Peripheral Refractive Profile after Orthokeratology for Different Degrees of Myopia. Curr Eye Res 2015; 41:199-207. [PMID: 25803198 DOI: 10.3109/02713683.2015.1009634] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
PURPOSE The purpose of this study was to evaluate the effect of orthokeratology for different degrees of myopia correction in the relative location of tangential (F(T)) and sagittal (F(S)) power errors across the central 70° of the visual field in the horizontal meridian. METHODS Thirty-four right eyes of 34 patients with a mean age of 25.2 ± 6.4 years were fitted with Paragon CRT (Mesa, AZ) rigid gas permeable contact lenses to treat myopia (-2.15 ± 1.26D, range: -0.88 to -5.25D). Axial and peripheral refraction were measured along the central 70° of the horizontal visual field with the Grand Seiko WAM5500 open-field auto-refractor. Spherical equivalent (M), as well as tangential (FT) and sagittal power errors (FS) were obtained. Analysis was stratified in three groups according to baseline spherical equivalent: Group 1 [M(Baseline) = -0.88 to -1.50D; n = 11], Group 2 [M(Baseline) = -1.51 to -2.49D; n = 11], and Group 3 [M(Baseline) = -2.50 to -5.25D; n = 12]. RESULTS Spherical equivalent was significantly more myopic after treatment beyond the central 40° of the visual field (p < 0.001). FT became significantly more myopic for all groups in the nasal and temporal retina with 25° (p ≤ 0.017), 30° (p ≤ 0.007) and 35° (p ≤ 0.004) of eye rotation. Myopic change in FS was less consistent, achieving only statistical significance for all groups at 35° in the nasal and temporal retina (p ≤ 0.045). CONCLUSIONS Orthokeratology changes significantly FT in the myopic direction beyond the central 40° of the visual field for all degrees of myopia. Changes induced by orthokeratology in relative peripheral M, FT and FS with 35° of eye rotation were significantly correlated with axial myopia at baseline.
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Affiliation(s)
- José Manuel González-Méijome
- a Clinical & Experimental Optometry Research Lab, School of Sciences (Optometry), University of Minho , Braga , Portugal and
| | - Miguel A Faria-Ribeiro
- a Clinical & Experimental Optometry Research Lab, School of Sciences (Optometry), University of Minho , Braga , Portugal and
| | - Daniela P Lopes-Ferreira
- a Clinical & Experimental Optometry Research Lab, School of Sciences (Optometry), University of Minho , Braga , Portugal and
| | - Paulo Fernandes
- a Clinical & Experimental Optometry Research Lab, School of Sciences (Optometry), University of Minho , Braga , Portugal and
| | - Gonzalo Carracedo
- b Department of Optics II (Optometry and Vision) , School of Optics, Universidad Complutense de Madrid , Madrid , Spain
| | - Antonio Queiros
- a Clinical & Experimental Optometry Research Lab, School of Sciences (Optometry), University of Minho , Braga , Portugal and
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