A nuclear cataract looks gray when seen by a flashlight. If the pupil is widely dilated, the gray opacity is surrounded by a black rim. Through an ophthalmoscope, the cataract looks black against the red reflex.

Peripheral Cataract

A peripheral cataract produces spokelike shadows that point inward—gray against black as seen with a flashlight, or black against red with an ophthalmoscope. A dilated pupil, as shown here, facilitates this observation.

TABLE 5-9 ■ Pupillary Abnormalities n

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