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In this representative case of unilateral PEX, the fundus photographs show that the retinal artery diameter is narrower in the PE+ right eye (A, C) than in the PE- left eye (B, D). In this case, CRAE and CRVE are 121.3 and 165.5 microns, respectively, in the PE+ eye, and 127.9 and 181.4 microns, respectively, in the PE- eye. (C, D) Higher magnification of the optic disc in A and B, respectively. Magnifications, in A and B ×1; in C and D ×2.5.
