Measuring image distortions arising from age-related macular degeneration: An Iterative Amsler Grid (IAG).

ABSTRACT: Metamorphopsia, perceived as distortion of a shape, is experienced in age-related macular degeneration (AMD): straight lines appear to be curved and wavy to AMD patients and some other retinal pathologies. Conventional clinical assessment largely relies on asking patients to identify irregularities in Amsler Grids - a standardized set of equally spaced vertical and horizontal lines. Perceived distortions or gaps in the grid are a sign of macular pathology. Here, we developed an iterative Amsler Grid (IAG) procedure to obtain a quantifiable map of visual deformations. Horizontal and vertical line segments representing metamorphopsia are displayed on a computer screen. Line segments appearing distorted are adjusted by participants using the computer mouse to change their orientation in sever

SUBMITTER: Ayhan I 

PROVIDER: S-EPMC8906453 | biostudies-literature | 2022 Mar

REPOSITORIES: biostudies-literature