Amsler grid

(omz′lĕr)

[Marc Amsler, Swiss ophthalmologist, 1891-1968]
A grid of lines with a center black dot used by patients with macular degeneration to detect early worsening of their disease. Loss of vision in part of the grid or distortion of the lines (metamorphopsia) requires emergent evaluation for possible fluid or blood in the macula.

Amsler grid is a sample topic from the Taber's Medical Dictionary.

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