title: Decline of photopic multifocal electroretinogram responses with age is due primarily to preretinal optical factors.
abstract: Age-related changes in photopic retinal function were evaluated topographically with the multifocal electroretinogram (mfERG). Thirty-two subjects between the ages of 16 and 69 participated. There was a strong dependence on age for all mfERG response measures that was strongest for the group of central retinal responses (i.e., within 5 deg eccentricity) and approximately equal for responses between 5 and 20 deg. After adjustment for crystalline lens optical density and pupil diameter, significant effects of age were limited to central first-order (i.e., within 5 deg) and second-order response kernels. Simulation studies support an optical basis for the observed age-related changes. It is concluded that mfERG changes between the ages of 20 and 70 are due predominantly to preretinal optical factors.
authors.affiliation: Discoveries in Sight Research Laboratories, Devers Eye Institute, Portland, Oregon 97208-3950, USA.
authors.forename: Brad
authors.initials: B
authors.lastname: Fortune
authors.forename: Chris A
authors.initials: CA
authors.lastname: Johnson
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D000375:Aging / Q000502:physiology*; D003198:Computer Simulation; D004596:Electroretinography; D006801:Humans; D008875:Middle Aged; D008954:Models, Biological; D012160:Retina / Q000502:physiology*