Haidinger's brushes
noun plural
Hai·ding·er's brush·es
| \ ˈhī-diŋ-ərz-ˈbrəsh-əz
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Medical Definition of Haidinger's brushes
: a faint blue and yellow dumbbell-shaped image that is produced in the human eye by the selective absorption of polarized light by the yellow macular pigment of the fovea and can be used to detect polarized light without special equipment