On Amsler grid testing for age-related macular degeneration, which finding indicates metamorphopsia?

On Amsler grid testing for age-related macular degeneration, which finding indicates metamorphopsia?

• A. Modified color vision
• B. Distorted grid lines
• C. Clear, straight lines
• D. No change

Answer: (B)

Metamorphopsia is the perception of distortion in vision. In an Amsler grid, you fixate the center and expect the grid lines to look straight. If the lines appear bent, wavy, or distorted, that signals metamorphopsia from macular dysfunction such as AMD. Distorted grid lines are the telltale sign, whereas changes in color vision or seeing straight lines with no distortion suggest no metamorphopsia.

Metamorphopsia is the perception of distortion in vision. In an Amsler grid, you fixate the center and expect the grid lines to look straight. If the lines appear bent, wavy, or distorted, that signals metamorphopsia from macular dysfunction such as AMD. Distorted grid lines are the telltale sign, whereas changes in color vision or seeing straight lines with no distortion suggest no metamorphopsia.