Vision Exam Breakdown SLIT LAMP EXAM A slit lamp is an upright microscope that allows a practitioner to thoroughly examine the external aspects of the eye: the lids, conjunctiva, corneal tissue, iris, and lens. If the eye is dilated, the internal structures can also be examined in great detail. Abnormalities of these structures may indicate cataracts, macular degeneration, optic nerve disease, or other retinal diseases can be detected.
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