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Zhang T, Huang F, Gao N, Du M, Cheng H, Huang W, Ji Y, Zheng S, Wan W, Hu K. Three-Dimensional Quantitative Description of the Implantable Collamer Lens in the Ocular Anterior Segment of Patients With Myopia. Am J Ophthalmol 2023; 252:59-68. [PMID: 36933857 DOI: 10.1016/j.ajo.2023.03.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2022] [Revised: 02/22/2023] [Accepted: 03/05/2023] [Indexed: 03/19/2023]
Abstract
PURPOSE To describe the 3-dimensional (3D) location of the implantable collamer lens (ICL) quantitatively in the posterior ocular chamber of patients with myopia. DESIGN Cross-sectional study. METHODS To obtain visualization models before and after mydriasis, an automatic 3D imaging method based on swept-source optical coherence tomography was created. Parameters like the ICL lens volume (ILV), the tilt of the ICL and crystalline lens, the vault distribution index, and topographic maps were evaluated to describe the ICL location. Using a paired sample t test and the Wilcoxon signed rank test, the difference between nonmydriasis and postmydriasis conditions was compared. RESULTS The study investigated 32 eyes from 20 patients. The 3D central vault did not differ significantly before (P = .994) or after mydriasis (P = .549) compared with the 2D central vault. After mydriasis, the 5-mm ILV decreased by 0.85 mm2 (P = .016), and the vault distribution index increased significantly (P = .001). The ICL and the crystalline lens exhibited tilt (nonmydriasis: ICL total tilt 3.78 ± 1.85 degrees, lens total tilt 4.03 ± 1.53 degrees; postmydriasis: ICL total tilt 3.84 ± 1.56 degrees, lens total tilt 4.09 ± 1.64 degrees). The phenomenon of asynchronous tilt of the ICL and lens was found in 5 eyes, leading to the spatially asymmetric distribution of the ICL-lens distance. CONCLUSION The 3D imaging technique provided exhaustive and reliable data for the anterior segment. The visualization models offered multiple perspectives on the ICL in the posterior chamber. Before and after mydriasis, the intraocular ICL position was described by the 3D parameters.
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Affiliation(s)
- Tong Zhang
- From Chongqing Medical University (T.Z., F.H., N.G., M.D., H.C., W.H., W.W., K.H.) and The First Affiliated Hospital of Chongqing Medical University (Y.J., S.Z., W.W., K.H.), Chongqing Key Laboratory of Ophthalmology, Chongqing Eye Institute, Chongqing Branch (Municipality Division) of National Clinical Research Center for Ocular Diseases, Chongqing, China
| | - Fanfan Huang
- From Chongqing Medical University (T.Z., F.H., N.G., M.D., H.C., W.H., W.W., K.H.) and The First Affiliated Hospital of Chongqing Medical University (Y.J., S.Z., W.W., K.H.), Chongqing Key Laboratory of Ophthalmology, Chongqing Eye Institute, Chongqing Branch (Municipality Division) of National Clinical Research Center for Ocular Diseases, Chongqing, China
| | - Ning Gao
- From Chongqing Medical University (T.Z., F.H., N.G., M.D., H.C., W.H., W.W., K.H.) and The First Affiliated Hospital of Chongqing Medical University (Y.J., S.Z., W.W., K.H.), Chongqing Key Laboratory of Ophthalmology, Chongqing Eye Institute, Chongqing Branch (Municipality Division) of National Clinical Research Center for Ocular Diseases, Chongqing, China
| | - Miaomiao Du
- From Chongqing Medical University (T.Z., F.H., N.G., M.D., H.C., W.H., W.W., K.H.) and The First Affiliated Hospital of Chongqing Medical University (Y.J., S.Z., W.W., K.H.), Chongqing Key Laboratory of Ophthalmology, Chongqing Eye Institute, Chongqing Branch (Municipality Division) of National Clinical Research Center for Ocular Diseases, Chongqing, China
| | - Hong Cheng
- From Chongqing Medical University (T.Z., F.H., N.G., M.D., H.C., W.H., W.W., K.H.) and The First Affiliated Hospital of Chongqing Medical University (Y.J., S.Z., W.W., K.H.), Chongqing Key Laboratory of Ophthalmology, Chongqing Eye Institute, Chongqing Branch (Municipality Division) of National Clinical Research Center for Ocular Diseases, Chongqing, China
| | - Wanyao Huang
- From Chongqing Medical University (T.Z., F.H., N.G., M.D., H.C., W.H., W.W., K.H.) and The First Affiliated Hospital of Chongqing Medical University (Y.J., S.Z., W.W., K.H.), Chongqing Key Laboratory of Ophthalmology, Chongqing Eye Institute, Chongqing Branch (Municipality Division) of National Clinical Research Center for Ocular Diseases, Chongqing, China
| | - Yan Ji
- The First Affiliated Hospital of Chongqing Medical University, Chongqing Key Laboratory of Ophthalmology, Chongqing Eye Institute, Chongqing Branch (Municipality Division) of National Clinical Research Center for Ocular Diseases, Chongqing, China
| | - Shijie Zheng
- The First Affiliated Hospital of Chongqing Medical University, Chongqing Key Laboratory of Ophthalmology, Chongqing Eye Institute, Chongqing Branch (Municipality Division) of National Clinical Research Center for Ocular Diseases, Chongqing, China
| | - Wenjuan Wan
- From Chongqing Medical University (T.Z., F.H., N.G., M.D., H.C., W.H., W.W., K.H.) and The First Affiliated Hospital of Chongqing Medical University (Y.J., S.Z., W.W., K.H.), Chongqing Key Laboratory of Ophthalmology, Chongqing Eye Institute, Chongqing Branch (Municipality Division) of National Clinical Research Center for Ocular Diseases, Chongqing, China.; The First Affiliated Hospital of Chongqing Medical University, Chongqing Key Laboratory of Ophthalmology, Chongqing Eye Institute, Chongqing Branch (Municipality Division) of National Clinical Research Center for Ocular Diseases, Chongqing, China..
| | - Ke Hu
- From Chongqing Medical University (T.Z., F.H., N.G., M.D., H.C., W.H., W.W., K.H.) and The First Affiliated Hospital of Chongqing Medical University (Y.J., S.Z., W.W., K.H.), Chongqing Key Laboratory of Ophthalmology, Chongqing Eye Institute, Chongqing Branch (Municipality Division) of National Clinical Research Center for Ocular Diseases, Chongqing, China.; The First Affiliated Hospital of Chongqing Medical University, Chongqing Key Laboratory of Ophthalmology, Chongqing Eye Institute, Chongqing Branch (Municipality Division) of National Clinical Research Center for Ocular Diseases, Chongqing, China..
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Di Y, Li Y, Luo Y. Prediction of Implantable Collamer Lens Vault Based on Preoperative Biometric Factors and Lens Parameters. J Refract Surg 2023; 39:332-339. [PMID: 37162400 DOI: 10.3928/1081597x-20230207-03] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/11/2023]
Abstract
PURPOSE To establish and validate the accuracy of implantable collamer lens (ICL) vault size prediction formula based on preoperative biometric factors and lens parameters. METHODS This study included 300 patients (300 eyes) with Visian ICL V4c (STAAR Surgical) implantation. They were randomly divided into the formula establishment group and formula validation group. Anterior segment measurements, ICL V4c size and power, and vault 1 week postoperatively were collected from all patients. Multiple linear regression analysis was performed to establish the prediction formula. Mean absolute error (MAE), median absolute error (MedAE), root mean square error (RMSE), and Bland-Altman diagrams were used to evaluate the prediction formula. RESULTS Anterior chamber depth (ACD) had the greatest influence on vault 1 week after ICL V4c implantation, followed by ICL V4c size and angle-to-angle distance (ATA). The prediction formula was obtained according to the partial regression coefficient, which was vault (mm) = -1.279 + 0.291 × ACD (mm) + 0.210 × ICL V4c size (mm) - 0.144 × ATA (mm) (R2 = 0.661). In the formula validation group, the mean predictive vault, MAE, MedAE, and RMSE were 628.10, 135.09, 130.42, and 150.46 µm, respectively. The Bland-Altman diagram showed the predictive vault was in good agreement with the actual vault. CONCLUSIONS A novel ICL V4c vault prediction formula was developed and shown to be an effective method for predicting the vault to reduce surgical complications. [J Refract Surg. 2023;39(5):332-339.].
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Duan L, Dang G, Ge J, Gao Y, Wang L. Visual function assessment of Chinese cataract patients after individual aspheric intraocular lens implantation according to preoperative cornea spherical aberration. Technol Health Care 2022; 31:831-839. [PMID: 36442220 DOI: 10.3233/thc-220154] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
BACKGROUND: Aspheric intraocular lens (IOLs) implantation has been widely applied in cataract surgery. However, there is no consensus on the optimal guidance for the operations in IOLs implantation. OBJECTIVE: This study evaluated the visual function of Chinese cataract patients six months after cataract surgery with two different guiding ideologies. METHODS: We evaluated 50 patients (61 eyes) with implantation of different aspheric IOLs (SN60WF IOLs, ZCB00 IOLs, PY-60AD IOLs, AO IOLs) 6 months after cataract surgery. Twenty-four patients (30 eyes) under individual implantation were ascribed to group 1 and 26 patients (31 eyes) with randomized implantation were ascribed to the control group (group 2). Postoperatively parameters included monocular best-corrected visual acuity (BCVA), contrast sensitivity (CS), total spherical aberration Z (4, 0) at 5 mm pupil size, and patient satisfaction. The quality of life after operation was assessed through the National Eye Institute Visual Function Questionnaire-25 (NEI VFQ-25). RESULTS: Six months after cataract operation, the contrast sensitivity with glare of group 1 at 2.5∘ was 0.697 ± 0.027, and 0.532 ± 0.049 in group 2. Besides, there was no significant difference at any other special frequency. The mean spherical aberration Z (4, 0) at 5 mm pupil size in group 1 was 0.015 ± 0.028 um, and in group 2 was 0.043 ± 0.109 um, with a significant difference (p< 0.01). The mean scores obtained from NEI VFQ-25 were not significantly different. CONCLUSION: It is effective to implant aspheric IOLs individually according to preoperative corneal spherical aberration. Patients obtained better contrast sensitivity with glare at 2.5∘, but there was no significant difference in BCVA, contrast sensitivity at other special frequency, and subjective visual function.
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Affiliation(s)
- Lian Duan
- Department of Ophthalmology, Qianfoshan Hospital Affiliated to Shandong University, Jinan, Shandong, China
- Department of Ophthalmology, Qianfoshan Hospital Affiliated to Shandong University, Jinan, Shandong, China
| | - Guangfu Dang
- Department of Ophthalmology, Qianfoshan Hospital Affiliated to Shandong University, Jinan, Shandong, China
- Department of Ophthalmology, Qianfoshan Hospital Affiliated to Shandong University, Jinan, Shandong, China
| | - Jinling Ge
- Mingshui Eye Hospital, Jinan, Shandong, China
- Department of Ophthalmology, Qianfoshan Hospital Affiliated to Shandong University, Jinan, Shandong, China
| | - Yang Gao
- Department of Ophthalmology, Qianfoshan Hospital Affiliated to Shandong University, Jinan, Shandong, China
| | - Lihua Wang
- Department of Ophthalmology, Shandong Provincial Hospital Affiliated to Shandong University, Jinan, Shandong, China
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Mahmoud MSED, AbdelHalim AS, Zein HA. Effect of Light Conditions and Accommodation on Implantable Phakic Contact Lens Vault by Anterior Segment Optical Coherence Tomography. Clin Ophthalmol 2022; 16:1439-1447. [PMID: 35547401 PMCID: PMC9084507 DOI: 10.2147/opth.s359296] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2022] [Accepted: 04/11/2022] [Indexed: 11/26/2022] Open
Abstract
Purpose To investigate the dynamic pupil and vault changes in eyes with implantable phakic contact lens (IPCL) under photopic and scotopic settings, as well as during accommodation using the anterior segment optical coherence tomography (AS-OCT). Methods A prospective observational study included consecutive 36 eyes of myopic patients who underwent IPCL V2.0 implantation. Under photopic and scotopic light settings, as well as during accommodation, all patients were scanned using CASIA OCT (CASIA2; TOMEY, Nagoya, Japan). The pupil size, the vault (distance between the back surface of the IPCL and the anterior lens capsule), ACD-lens (distance between the posterior corneal surface and the anterior lens surface), IPCL-lens (distance between the posterior corneal surface and the anterior IPCL surface), and lens thickness (LT) were the study parameters. Results The vault was significantly lower under photopic conditions (p-value<0.001). The pupil size was significantly smaller in photopic conditions (p-value<0.001). LT (p-value=0.975) and ACD-lens (p-value=0.917) were not significantly different between scotopic and photopic conditions, while the ACD-IPCL was significantly larger during photopic conditions (p-value=0.013). There were significant changes in all parameters between accommodative and non-accommodative conditions. Conclusion The IPCL vault decreased significantly under photopic light conditions and accommodation.
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Affiliation(s)
- Mohamed Salah El-Din Mahmoud
- Ophthalmology Department, Faculty of Medicine, Minia University, Minia, Egypt
- Correspondence: Mohamed Salah El-Din Mahmoud, Ophthalmology Department, Faculty of Medicine, Minia University, Minia, Egypt, Tel +20 1003321802, Email ;
| | | | - Hosny Ahmed Zein
- Ophthalmology Department, Faculty of Medicine, Minia University, Minia, Egypt
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