Age-Dependence of the Peripheral Defocus of the Isolated Human Crystalline Lens.

Autor:	Maceo Heilman B; Ophthalmic Biophysics Center, Bascom Palmer Eye Institute, University of Miami Miller School of Medicine, Miami, Florida, United States.; Department of Biomedical Engineering, University of Miami College of Engineering, Coral Gables, Florida, United States., Mohamed A; Ophthalmic Biophysics, LV Prasad Eye Institute, Hyderabad, Telangana, India.; Brien Holden Vision Institute, Sydney, New South Wales, Australia.; School of Optometry and Vision Science, University of New South Wales, Sydney, New South Wales, Australia., Ruggeri M; Ophthalmic Biophysics Center, Bascom Palmer Eye Institute, University of Miami Miller School of Medicine, Miami, Florida, United States.; Department of Biomedical Engineering, University of Miami College of Engineering, Coral Gables, Florida, United States., Williams S; Ophthalmic Biophysics Center, Bascom Palmer Eye Institute, University of Miami Miller School of Medicine, Miami, Florida, United States.; Department of Biomedical Engineering, University of Miami College of Engineering, Coral Gables, Florida, United States., Ho A; Ophthalmic Biophysics Center, Bascom Palmer Eye Institute, University of Miami Miller School of Medicine, Miami, Florida, United States.; Department of Biomedical Engineering, University of Miami College of Engineering, Coral Gables, Florida, United States.; Brien Holden Vision Institute, Sydney, New South Wales, Australia.; School of Optometry and Vision Science, University of New South Wales, Sydney, New South Wales, Australia., Parel JM; Ophthalmic Biophysics Center, Bascom Palmer Eye Institute, University of Miami Miller School of Medicine, Miami, Florida, United States.; Department of Biomedical Engineering, University of Miami College of Engineering, Coral Gables, Florida, United States.; Brien Holden Vision Institute, Sydney, New South Wales, Australia., Manns F; Ophthalmic Biophysics Center, Bascom Palmer Eye Institute, University of Miami Miller School of Medicine, Miami, Florida, United States.; Department of Biomedical Engineering, University of Miami College of Engineering, Coral Gables, Florida, United States.
Jazyk:	angličtina
Zdroj:	Investigative ophthalmology & visual science [Invest Ophthalmol Vis Sci] 2021 Mar 01; Vol. 62 (3), pp. 15.
DOI:	10.1167/iovs.62.3.15
Abstrakt:	Purpose: To characterize the peripheral defocus of isolated human crystalline lenses and its age dependence. Methods: Data were acquired on 116 isolated lenses from 99 human eyes (age range, 0.03-61 years; postmortem time, 40.1 ± 21.4 hours). Lenses were placed in a custom-built combined laser ray tracing and optical coherence tomography system that measures the slopes of rays refracted through the lens for on-axis and off-axis incidence angles. Ray slopes were measured by recording spot patterns as a function of axial position with an imaging sensor mounted on a positioning stage below the tissue chamber. Delivery angles ranged from -30° to +30° in 5° increments using a 6 mm × 6 mm raster scan with 0.5-mm spacing. Lens power at each angle was calculated by finding the axial position that minimizes the root-mean-square size of the spot pattern formed by the 49 central rays, corresponding to a 3-mm zone on-axis. The age dependence of the on-axis and off-axis optical power and the relative peripheral defocus (difference between off-axis and on-axis power) of lenses were quantified. Results: At all angles, lens power decreased significantly with age. Lens power increased with increasing delivery angle for all lenses, corresponding to a shift toward myopic peripheral defocus. There was a statistically significant decrease in the lens peripheral defocus with age. Conclusions: The isolated human lens power increases with increasing field angle. The lens relative peripheral defocus decreases with age, which may contribute to the age-related changes of ocular peripheral defocus during refractive development.
Databáze:	MEDLINE
Externí odkaz:	Zobrazit plný text záznamu