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Arch Ophthalmol. 1999;117:810.

	Since this article does not have an abstract, we have provided the first 50 words of the full text and any section headings.

Bifocal glasses cataract patients. Dr. W. THOMPSON exhibited a pair of bifocal glasses, made by Borsch, where the refraction in the lower half of glasses increased 2 D., by adding a segment of flint glass to the remaining crown glass. The resulting combination is also achromatic.

Reference: Arch Ophthalmol. 1897;26:437.