Amsler, J. W.

J. W. Amsler is known for creating the Amsler Grid, a tool used by eye care professionals to detect and monitor changes in the central visual field, particularly related to macular health. The grid is a square with a pattern of horizontal and vertical lines, with a dot in the center. Patients look at the dot and report any distortions, blurriness, or missing areas. This simple test helps identify conditions like age-related macular degeneration early, enabling timely intervention to preserve vision.