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April 1989

Use of Cross-Polarized Light in Anterior Segment Photography

Author Affiliations

From the Eye Research Institute of Retina Foundation (Drs Fariza, Jalkh, and Medina), Retina Associates (Drs Fariza and Jalkh and Mr O'Day), and the Department of Ophthalmology, Harvard Medical School (Drs Fariza and Jalkh), Boston; and NASA, California Institute of Technology, Pasadena, Calif (Dr Medina).

Arch Ophthalmol. 1989;107(4):608-610. doi:10.1001/archopht.1989.01070010622044

• A photographic technique improved the quality of anterior segment photography by using one polarizer in the illumination path and another polarizer that was perpendicularly oriented to the first in front of the camera film back. A significant improvement was noted by impartial masked observers who assessed standard photographs of the iris, conjunctiva, and sclera. A crosslike artifact, observed in photographs using cross-polarizers, was present and originated from corneal birefringence. The significance of the artifact and its possible diagnostic applications were determined.