Publication
Title
Retinal shadows produced by myopia control spectacles
Author
Abstract
Purpose: To analyse ocular coherence tomography (OCT) images of the retinal shadows caused by defocus and diffusion optics spectacles. Methods: One eye was fitted successively with the Hoya Defocus Incorporated Multiple Segments (DIMS) spectacle lens, two variations of the +3.50 D peripheral add spectacle (DEFOCUS) and the low-contrast dot lens (Diffusion Optics Multiple Segments, DOMS); each at a vertex distance of 12 mm. Simultaneously, a retinal image of the macular region with central fixation was obtained using infrared OCT. The corneal power and intraocular distances were determined using an optical biometer. Results: The retinal images for the DIMS and DOMS lenses showed patterns of obvious retinal shadows in the periphery, while the central 10-11 degrees remained clear. The DEFOCUS lens produced a darkened peripheral area. Dividing the size of the retinal pattern, measured with the calliper of the OCT software, by the actual size on the spectacle lens gave a magnification of 0.57 times. Based on the ocular biometry, the magnification of the retinal patterns was estimated at 0.46 times, meaning that the shadows in the OCT images were slightly further away from the fovea than where the wearer would observe them. The source of this discrepancy was probably the angle of the scanning OCT beam, which was not parallel to the optical axis. Conclusion: With device-specific correction, retinal OCT images can help visualise the regions affected by the defocus or lowered contrast induced by myopia control spectacles. This is of potential value for improving myopia therapies.
Language
English
Source (journal)
Ophthalmic and physiological optics. - Guildford
Publication
Hoboken : Wiley , 2023
ISSN
0275-5408
DOI
10.1111/OPO.13228
Volume/pages
44 :1 (2023) , p. 214-218
ISI
001065136400001
Pubmed ID
37642972
Full text (Publisher's DOI)
Full text (publisher's version - intranet only)
UAntwerpen
Faculty/Department
Research group
Publication type
Subject
Affiliation
Publications with a UAntwerp address
External links
Web of Science
Record
Identifier
Creation 30.10.2023
Last edited 20.12.2023
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