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Moshkovitz A, Lev M, Polat U. Crowding under scotopic and photopic vision in albino and normal-sighted participants. Sci Rep 2024; 14:8234. [PMID: 38589506 PMCID: PMC11001935 DOI: 10.1038/s41598-024-58369-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2023] [Accepted: 03/28/2024] [Indexed: 04/10/2024] Open
Abstract
Crowding is a phenomenon in which the ability to recognize an object in a clutter deteriorates. It is, therefore, a fundamental aspect of object recognition and crucial in deciphering resolution. For visually impaired individuals, deficiency in crowding has a tremendous effect on vision and may reflect and predict the amount of deterioration in vision. It is well established that albinos suffer much more from crowding than normally sighted individuals under daylight luminance conditions. However, to our knowledge, this study is the first to investigate crowding in albino participants under low light conditions. In this study, we explored the crowding effect in a group of albino participants (n = 9) and a control group of normally sighted participants (n = 9). Crowding was conducted under daylight (photopic vision) and low light (scotopic vision). We measured the visual acuity threshold under crowding in three-letter spacing (0.5, 1, and 1.5) and compared it to a single target. Results indicate that albino participants experienced stronger crowding than the control under the photopic condition, while crowding under the scotopic condition was apparent in the albino but abolished for the control group. These findings highlight the importance of considering luminance when discussing the visually impaired population in general. In particular, it suggests that crowding in albinism is based on a peripheral-like mechanism and may indicate a cessation in visual development.
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Affiliation(s)
- Avital Moshkovitz
- School of Optometry and Vision Sciences, Faculty of Life Sciences, Bar-Ilan University, Ramat Gan, Israel
| | - Maria Lev
- School of Optometry and Vision Sciences, Faculty of Life Sciences, Bar-Ilan University, Ramat Gan, Israel
| | - Uri Polat
- School of Optometry and Vision Sciences, Faculty of Life Sciences, Bar-Ilan University, Ramat Gan, Israel.
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Wygnanski-Jaffe T, Moshkovitz A, Kushner BJ, Belkin M, Yehezkel O. Binocular Home Treatment for Amblyopia: Gains Stable for One Year. Am J Ophthalmol 2024; 262:199-205. [PMID: 38360334 DOI: 10.1016/j.ajo.2024.02.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2023] [Revised: 02/03/2024] [Accepted: 02/05/2024] [Indexed: 02/17/2024]
Abstract
PURPOSE To report the long-term outcomes of a noninferiority randomized controlled trial (RCT) with a binocular eye-tracking-based home treatment (CureSight; NovaSight, Ltd.) in patients with amblyopia. DESIGN Prospective, multicenter, nonrandomized, long-term follow-up observational study of an RCT. METHODS Forty-three children 4 to <9 years of age with anisometropic, small-angle strabismic, or mixed-mechanism amblyopia were initially treated for 16 weeks (NCT05185076) with CureSight. In this planned observational follow-up study, 38 patients with no additional amblyopia treatment were evaluated at 12 weeks post-treatment, and 27 were evaluated at 1-year post-treatment. The main outcome measures were visual acuity (VA), stereoacuity, and amblyopia recurrence at 12- and 52-week post-treatment. RESULTS At 12-week post-treatment, improvement in amblyopic eye VA was maintained vs baseline (0.27 ± 0.14 logMAR, P< .0001), with no change vs the end-of-treatment visit (P > .05). At 1 year there was a partial reduction in the amblyopic eye VA gain of 0.085±0.1 logMAR compared to end-of-treatment (P = .001), but the residual gain of 0.20±0.14 logMAR compared to baseline was statistically significant (P < .0001). Gains in stereoacuity and binocular VA were maintained vs baseline at both 12-weeks and 1-year post-treatment (P < .0001), with no change vs end-of-treatment (P > .05). Amblyopia recurrence (a worsening of ≥2 logMAR levels compared with end-of-treatment) occurred in 2/38 patients at 12-weeks post-treatment (5.3%), and in 5/27 patients at 1-year post-treatment (20.4%). CONCLUSIONS VA and stereopsis gains following binocular treatment with CureSight were maintained at 1 year without additional treatment.
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Affiliation(s)
- Tamara Wygnanski-Jaffe
- Goldschleger Eye Institute, Sheba Medical Center (T.W.-J.), Tel Hashomer, Israel; Sackler Faculty of Medicine, Tel-Aviv University (T.W.-J., M.B.), Tel-Aviv, Israel
| | | | - Burton J Kushner
- Department of Ophthalmology and Visual Sciences, University of Wisconsin (B.J.K.), Madison, Wisconsin, USA
| | - Michael Belkin
- Sackler Faculty of Medicine, Tel-Aviv University (T.W.-J., M.B.), Tel-Aviv, Israel; Goldschleger Eye Research Institute, Sheba Medical Center (M.B.), Tel Hashomer, Israel
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Zhu W, Tian T, Yehezkel O, Wygnanski-Jaffe T, Moshkovitz A, Lin J, Hu C, Liu R. A Prospective Trial to Assess the Efficacy of Eye-Tracking-Based Binocular Treatment versus Patching for Children's Amblyopia: A Pilot Study. Semin Ophthalmol 2023; 38:761-767. [PMID: 37339068 DOI: 10.1080/08820538.2023.2223275] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/06/2022] [Revised: 05/01/2023] [Accepted: 05/04/2023] [Indexed: 06/22/2023]
Abstract
PURPOSE To assess visual acuity (VA) and stereoacuity (SA) improvements in children with amblyopia treated with either binocular dichoptic treatment or patching treatment. METHODS In this pilot prospective coherent study, 34 participants between 4 and 9 years of age with unilateral anisometropic amblyopia and without history of prior amblyopia treatment were enrolled into three groups. Full treatment group (FTG; n = 12): participants were prescribed the binocular dichoptic treatment to watch for 90 minutes per day, 5 days a week. Part-time treatment group (PTTG; n = 8): participants were prescribed the same binocular treatment as FTG, 90 minutes per day, 3 days per week. Patching treatment group (PTG; n = 14): participants wore an adhesive patch over the dominant eye for 2 hours per day, 7 days per week. Amblyopic-eye distance visual acuity (DVA), near visual acuity (NVA) and SA were evaluated at baseline, 4, 8, and 12 weeks. RESULTS At 12 weeks, mean amblyopic-eye DVA improved 1.8 lines (95% CI, 1.1-2.5) in FTG, 1.5 lines (95% CI, 0.4-2.7) in PTTG and 3.0 lines (95% CI, 2.0-4.0) in PTG. The amblyopic-eye NVA improved 2.9 lines (95% CI, 2.4-3.5) in FTG, 1.7 lines (95% CI, 0.5-3.0) in PTTG and 2.8 lines (95% CI, 1.8-3.9) in PTG. The SA improved 0.38 log-arcseconds (95% CI, 0.24-0.53) in FTG, 0.59 log-arcseconds (95% CI, 0.36-0.82) in PTTG and 0.40 log-arcseconds (95% CI, 0.13-0.67) in PTG. No significant differences were found in DVA, NVA or SA improvement between FTG and PTG at 12 weeks. CONCLUSIONS VA and SA after binocular dichoptic treatment produced a similar therapeutic outcome to patching, suggesting a potential value for binocular therapy when treating anisometropic moderate degree of Children's amblyopia.
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Affiliation(s)
- Wenqing Zhu
- Department of Ophthalmology, Eye and ENT Hospital of Fudan University, Shanghai, China
- NHC Key Laboratory of Myopia (Fudan University), Shanghai, China
| | - Tian Tian
- Department of Ophthalmology, Eye and ENT Hospital of Fudan University, Shanghai, China
- NHC Key Laboratory of Myopia (Fudan University), Shanghai, China
| | | | - Tamara Wygnanski-Jaffe
- Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel
- Goldschleger Eye Institute, Tel Aviv, Israel
| | | | - Jin Lin
- Department of Ophthalmology, Eye and ENT Hospital of Fudan University, Shanghai, China
- NHC Key Laboratory of Myopia (Fudan University), Shanghai, China
- Key Laboratory of Myopia, Chinese Academy of Medical Sciences (Fudan University), Shanghai, China
| | - Chanling Hu
- Department of Ophthalmology, Eye and ENT Hospital of Fudan University, Shanghai, China
- NHC Key Laboratory of Myopia (Fudan University), Shanghai, China
- Key Laboratory of Myopia, Chinese Academy of Medical Sciences (Fudan University), Shanghai, China
| | - Rui Liu
- Department of Ophthalmology, Eye and ENT Hospital of Fudan University, Shanghai, China
- NHC Key Laboratory of Myopia (Fudan University), Shanghai, China
- Key Laboratory of Myopia, Chinese Academy of Medical Sciences (Fudan University), Shanghai, China
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Wygnanski-Jaffe T, Kushner BJ, Moshkovitz A, Belkin M, Yehezkel O. An Eye-Tracking-Based Dichoptic Home Treatment for Amblyopia: A Multicenter Randomized Clinical Trial. Ophthalmology 2023; 130:274-285. [PMID: 36306974 DOI: 10.1016/j.ophtha.2022.10.020] [Citation(s) in RCA: 9] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2022] [Revised: 10/18/2022] [Accepted: 10/18/2022] [Indexed: 11/06/2022] Open
Abstract
PURPOSE Comparing visual outcomes after use of a novel binocular eye-tracking-based home treatment (CureSight; NovaSight, Ltd) with patching. DESIGN Prospective, multicenter, randomized, masked, controlled, noninferiority pivotal trial. PARTICIPANTS One hundred three children 4 to < 9 years with anisometropic, small-angle strabismic or mixed-mechanism amblyopia were randomized 1:1 to either CureSight treatment or patching. METHODS The CureSight treatment uses combined anaglyph glasses and an eye tracker to induce real-time blur around the fellow eye fovea in dichoptic streamed video content. Participants used the device for 90 minutes/day, 5 days/week for 16 weeks (120 hours). The patching group received 2 hours of patching 7 days/week (224 hours). The prespecified noninferiority margin was 1 line. MAIN OUTCOME MEASURES The primary outcome was the improvement in the amblyopic eye visual acuity (VA), modeled with a repeated measures analysis of covariance. Secondary outcomes included stereoacuity, binocular VA, and treatment adherence rates, analyzed by a 1-sample Wilcoxon test within each group and a 2-sample Wilcoxon test comparing groups. Safety outcomes included the frequency and severity of study-related adverse events (AEs). RESULTS CureSight group VA improvement was found to be noninferior to patching group improvement (0.28 ± 0.13 logarithm of the minimum angle of resolution [logMAR] [P < 0.0001] and 0.23 ± 0.14 logMAR [P < 0.0001], respectively; 90% confidence interval [CI] of difference, -0.008 to 0.076). Stereoacuity improvement of 0.40 log arcseconds (P < 0.0001) and improved binocular VA (0.13 logMAR; P < 0.0001) were observed in the binocular treatment group, with similar improvements in the patching group in stereoacuity (0.40 log arcseconds; P < 0.0001) and binocular VA (0.09 logMAR; P < 0.0001), with no significant difference between improvements in the 2 groups in either stereoacuity (difference, 0; 95% CI, -0.27 to -0.27; P = 0.76) or binocular VA (difference, 0.041; 95% CI, -0.002 to 0.085; P = 0.07). The binocular treatment group had a significantly higher adherence than the patching group (91% vs. 83%; 95% CI, -4.0% to 21%; P = 0.011). No serious AEs were found. CONCLUSIONS Binocular treatment was well tolerated and noninferior to patching in amblyopic children 4 to < 9 years of age. High adherence may provide an alternative treatment option for amblyopia. FINANCIAL DISCLOSURE(S) Proprietary or commercial disclosure may be found after the references.
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Affiliation(s)
- Tamara Wygnanski-Jaffe
- Goldschleger Eye Institute, Sheba Medical Center, Tel Hashomer, Israel; Sackler Faculty of Medicine, Tel-Aviv University, Tel-Aviv, Israel
| | - Burton J Kushner
- Department of Ophthalmology and Visual Sciences, University of Wisconsin, Madison, Wisconsin
| | | | - Michael Belkin
- Sackler Faculty of Medicine, Tel-Aviv University, Tel-Aviv, Israel; Goldschleger Eye Research Institute, Sheba Medical Center, Tel Hashomer, Israel
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Yehezkel O, Wygnanski-Jaffe T, Belkin M, Moshkovitz A. A novel eye-tracking-based binocular therapeutic improves visual performances in amblyopic children: a pilot study. J Vis 2022. [DOI: 10.1167/jov.22.14.4497] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022] Open
Affiliation(s)
| | - Tamara Wygnanski-Jaffe
- Goldschleger Eye Institute, Tel-Hashomer, Israel
- Sackler Faculty of Medicine, Tel- Aviv University, Tel-Aviv, Israel
| | - Michael Belkin
- Goldschleger Eye Institute, Tel-Hashomer, Israel
- Sackler Faculty of Medicine, Tel- Aviv University, Tel-Aviv, Israel
| | - Avital Moshkovitz
- NovaSight LTD., Airport City, Israel
- Bar-Ilan University. Ramat Gan, Israel
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Moshkovitz A, Maria Lev M, Polat U. The central visual field might mediate night vision. J Vis 2022. [DOI: 10.1167/jov.22.14.4262] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022] Open
Affiliation(s)
| | | | - Uri Polat
- Bar-Ilan University, Ramat Gan Israel
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Zou L, Tian T, Wygnanski-Jaffe T, Yehezkel O, Wang S, Moshkovitz A, Sun X, Liu H, Liu R. Effectiveness and repeatability of eye-tracking-based test in strabismus measurement of children. Semin Ophthalmol 2021; 37:502-508. [PMID: 34814794 DOI: 10.1080/08820538.2021.2002918] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Abstract
OBJECTIVES To assess the effectiveness of an eye-tracking-based test (ETBT) to measure eye deviation angle vs. a manual prism alternating cover test (PACT) in children with strabismus. DESIGN The prospective, masked, cross-sectional study included 95 children aged 1.8 years and older. Eye deviation was tested twice by each of ETBT and PACT. Each subject underwent four strabismus measurements, two by the ETBT and two by PACT. In each test, subjects were fixated on accommodative targets at 50 cm, with habitual optical correction allowed. Masked examiners compared the manual PACT results with those of the ETBT. RESULTS There was a high correlation (about 90%) between the ETBT and PACT. Repeatability of ETBT was higher than that of PACT (correlation coefficients of 0.99 and 0.91 respectively, p < .002). Age, strabismus type, and eye deviation measurement did not affect repeatability of ETBT. However, in PACT, results could not be correlated between the two examiners when the deviation was larger than 40 prism diopters. CONCLUSIONS The ETBT was effective in measuring eye deviation in children as young as 1.8 years. The ETBT showed higher repeatability compared to PACT.
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Affiliation(s)
- Leilei Zou
- Department of Ophthalmology, Eye and ENT Hospital of Fudan University, Shanghai, China.,NHC Key Laboratory of Myopia (Fudan University), Shanghai, China.,Key Laboratory of Myopia, Chinese Academy of Medical Sciences (Fudan University), Shanghai, China.,Department of Ophthalmology, Shanghai Children's Medical Center, School of Medicine, Shanghai Jiao Tong University, Shanghai, China
| | - Tian Tian
- Department of Ophthalmology, Eye and ENT Hospital of Fudan University, Shanghai, China.,NHC Key Laboratory of Myopia (Fudan University), Shanghai, China.,Key Laboratory of Myopia, Chinese Academy of Medical Sciences (Fudan University), Shanghai, China
| | - Tamara Wygnanski-Jaffe
- Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel.,Goldschleger Eye Institute, Tel Hashomer, Israel
| | | | - Shu Wang
- Department of Ophthalmology, Eye and ENT Hospital of Fudan University, Shanghai, China.,NHC Key Laboratory of Myopia (Fudan University), Shanghai, China.,Key Laboratory of Myopia, Chinese Academy of Medical Sciences (Fudan University), Shanghai, China
| | - Avital Moshkovitz
- School of Optometry and Vision Sciences, Faculty of Life Sciences, Bar-llan University, Ramat Gan, Israel
| | - Xinghuai Sun
- Department of Ophthalmology, Eye and ENT Hospital of Fudan University, Shanghai, China.,NHC Key Laboratory of Myopia (Fudan University), Shanghai, China.,Key Laboratory of Myopia, Chinese Academy of Medical Sciences (Fudan University), Shanghai, China
| | - Hong Liu
- Department of Ophthalmology, Shanghai Children's Medical Center, School of Medicine, Shanghai Jiao Tong University, Shanghai, China
| | - Rui Liu
- Department of Ophthalmology, Eye and ENT Hospital of Fudan University, Shanghai, China.,NHC Key Laboratory of Myopia (Fudan University), Shanghai, China.,Key Laboratory of Myopia, Chinese Academy of Medical Sciences (Fudan University), Shanghai, China
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Abstract
Contrast sensitivity is mostly used as a tool for testing aspects of visual functions. Infantile nystagmus is a pathological phenomenon that affects the spatial-temporal visual functions due to spontaneous oscillating movements of the eyes. We examined the spatial-temporal aspects of nystagmus perception, aiming to investigate the mechanisms underlying the deterioration of their visual performance. We tested the monocular and binocular contrast sensitivity of nystagmus and normally sighted subjects by measuring contrast detection of a Gabor target with spatial frequencies slightly above the cutoff threshold of each subject (nystagmus ~3; controls = 9cpd; presentation times 60–480 ms). The dominant eye of nystagmus revealed large differences over the non-dominant eye, highlighting the superiority of the dominant over the non-dominant eye in nystagmus. In addition, binocular summation mechanism was impaired in majority of the nystagmus subjects. Furthermore, these differences are not attributed to differences in visual acuity. Moreover, the visual performance in nystagmus continue to improve for longer presentation time compared with controls and was longer in the poor eye. Since the results are not due to differences in eye movements and strabismus, we suggest that the differences are due to developmental impairment in the visual system during the critical period.
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Affiliation(s)
- Avital Moshkovitz
- School of Optometry and Vision Sciences, Faculty of Life Sciences, Bar-Ilan University, Ramat Gan, Israel
| | - Maria Lev
- School of Optometry and Vision Sciences, Faculty of Life Sciences, Bar-Ilan University, Ramat Gan, Israel
| | - Uri Polat
- School of Optometry and Vision Sciences, Faculty of Life Sciences, Bar-Ilan University, Ramat Gan, Israel.
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Arens-Arad T, Farah N, Lender R, Moshkovitz A, Flores T, Palanker D, Mandel Y. Cortical Interactions between Prosthetic and Natural Vision. Curr Biol 2019; 30:176-182.e2. [PMID: 31883811 DOI: 10.1016/j.cub.2019.11.028] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2019] [Revised: 10/14/2019] [Accepted: 11/07/2019] [Indexed: 01/15/2023]
Abstract
Outer retinal degenerative diseases, such as retinitis pigmentosa (RP) and age-related macular degeneration (AMD), are among the leading causes of incurable blindness in the Western world [1]. Retinal prostheses have been shown to restore some useful vision by electrically stimulating the remaining retinal neurons [2]. In contrast to inherited retinal degenerative diseases (e.g., RP), typically leading to a complete loss of the visual field, in AMD patients the disease is localized to the macula, leaving the peripheral vision intact. Implanting a retinal prosthesis in the central macula in AMD patients [3, 4] leads to an intriguing situation where the patient's central retina is stimulated electrically, whereas the peripheral healthy retina responds to natural light stimulation. An important question is whether the visual cortex responds to these two concurrent stimuli similarly to the interaction between two adjacent natural light stimuli projected onto healthy retina. Here, we investigated the cortical interactions between prosthetic and natural vision based on visually evoked potentials (VEPs) recorded in rats implanted with photovoltaic subretinal implants. Using this model, where prosthetic and natural vision information are combined in the visual cortex, we observed striking similarities in the interactions of natural and prosthetic vision, including similar effect of background illumination, linear summation of non-patterned stimuli, and lateral inhibition with spatial patterns [5], which increased with target contrast. These results support the idea of combined prosthetic and natural vision in restoration of sight for AMD patients.
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Affiliation(s)
- Tamar Arens-Arad
- Faculty of Life Sciences, School of Optometry and Vision Science, Bar-Ilan University, Max ve-Anna Webb St, Ramat Gan 5290002, Israel; Bar-Ilan Institute for Nanotechnology and Advanced Materials (BINA), Bar-Ilan University, Max ve-Anna Webb St, Ramat Gan 5290002, Israel
| | - Nairouz Farah
- Faculty of Life Sciences, School of Optometry and Vision Science, Bar-Ilan University, Max ve-Anna Webb St, Ramat Gan 5290002, Israel; Bar-Ilan Institute for Nanotechnology and Advanced Materials (BINA), Bar-Ilan University, Max ve-Anna Webb St, Ramat Gan 5290002, Israel
| | - Rivkah Lender
- Faculty of Life Sciences, School of Optometry and Vision Science, Bar-Ilan University, Max ve-Anna Webb St, Ramat Gan 5290002, Israel; Bar-Ilan Institute for Nanotechnology and Advanced Materials (BINA), Bar-Ilan University, Max ve-Anna Webb St, Ramat Gan 5290002, Israel
| | - Avital Moshkovitz
- Faculty of Life Sciences, School of Optometry and Vision Science, Bar-Ilan University, Max ve-Anna Webb St, Ramat Gan 5290002, Israel; Bar-Ilan Institute for Nanotechnology and Advanced Materials (BINA), Bar-Ilan University, Max ve-Anna Webb St, Ramat Gan 5290002, Israel
| | - Thomas Flores
- Hansen Experimental Physics Laboratory, Stanford University, 452 Lomita Mall, Stanford, CA 94305, USA
| | - Daniel Palanker
- Hansen Experimental Physics Laboratory, Stanford University, 452 Lomita Mall, Stanford, CA 94305, USA; Ophthalmology, Stanford University, 452 Lomita Mall, Stanford, CA 94305, USA
| | - Yossi Mandel
- Faculty of Life Sciences, School of Optometry and Vision Science, Bar-Ilan University, Max ve-Anna Webb St, Ramat Gan 5290002, Israel; Bar-Ilan Institute for Nanotechnology and Advanced Materials (BINA), Bar-Ilan University, Max ve-Anna Webb St, Ramat Gan 5290002, Israel.
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Bennett A, Davidovitch E, Beiderman Y, Agadarov S, Beiderman Y, Moshkovitz A, Polat U, Zalevsky Z. Corneal thickness measurement by secondary speckle tracking and image processing using machine-learning algorithms. J Biomed Opt 2019; 24:1-10. [PMID: 31797646 PMCID: PMC7005539 DOI: 10.1117/1.jbo.24.12.126001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 06/26/2019] [Accepted: 11/04/2019] [Indexed: 06/10/2023]
Abstract
Corneal thickness (CoT) is an important tool in the evaluation process for several disorders and in the assessment of intraocular pressure. We present a method enabling high-precision measurement of CoT based on secondary speckle tracking and processing of the information by machine-learning (ML) algorithms. The proposed configuration includes capturing by fast camera the laser beam speckle patterns backscattered from the corneal-scleral border, followed by ML processing of the image. The technique was tested on a series of phantoms having different thicknesses as well as in clinical trials on human eyes. The results show high accuracy in determination of eye CoT, and implementation is speedy in comparison with other known measurement methods.
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Affiliation(s)
- Aviya Bennett
- Bar-Ilan University, Faculty of Engineering, Nanotechnology Center, Ramat-Gan, Israel
| | - Elnatan Davidovitch
- Bar-Ilan University, Faculty of Engineering, Nanotechnology Center, Ramat-Gan, Israel
| | - Yafim Beiderman
- Bar-Ilan University, Faculty of Engineering, Nanotechnology Center, Ramat-Gan, Israel
| | - Sergey Agadarov
- Bar-Ilan University, Faculty of Engineering, Nanotechnology Center, Ramat-Gan, Israel
| | - Yevgeny Beiderman
- Bar-Ilan University, Faculty of Engineering, Nanotechnology Center, Ramat-Gan, Israel
| | - Avital Moshkovitz
- Bar-Ilan University, School of Optometry and Vision Science, Ramat-Gan, Israel
| | - Uri Polat
- Bar-Ilan University, School of Optometry and Vision Science, Ramat-Gan, Israel
| | - Zeev Zalevsky
- Bar-Ilan University, Faculty of Engineering, Nanotechnology Center, Ramat-Gan, Israel
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Moshkovitz A, Ziv I, Lev M, Polat U. Spatial and Temporal Visual Perception of Infantile Nystagmus. J Vis 2019. [DOI: 10.1167/19.10.160] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
Affiliation(s)
- Avital Moshkovitz
- School of Optometry and Vision Sciences, Faculty of Life Sciences, Bar-Ilan University. Ramat-Gan, Israel
| | - Inbal Ziv
- School of Optometry and Vision Sciences, Faculty of Life Sciences, Bar-Ilan University. Ramat-Gan, Israel
| | - Maria Lev
- School of Optometry and Vision Sciences, Faculty of Life Sciences, Bar-Ilan University. Ramat-Gan, Israel
| | - Uri Polat
- School of Optometry and Vision Sciences, Faculty of Life Sciences, Bar-Ilan University. Ramat-Gan, Israel
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