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Eye Exams - Slit-lamp Exam

The slit-lamp examination looks at structures that are at the front of the eye (the anterior segment): The eyelid, the sclera (whites outer structure of the eye), conjunctiva (membranes lining the eyelid and sclera srface), iris (colored part of the eye), natural crystalline lens, and the cornea (thin transparent membrane that covers the iris and the lens). The slit-lamp is an instrument used with a high-intensity light source that can be focused to shine as a slit. It is used with the biomicroscope (an optical instrument that is like a microscope with two eyepieces).

The slit-lamp exam may detect findings of any disease of the eye. Some of these diseases may be:
  • cataract
  • corneal injury
  • macular degeneration
  • presbyopia
  • retinal detachment
  • retinal vessel occlusion
  • retinitis pigmentosa
  • Sjogren syndrome
  • uveitis

Photo of an eye doctor using a slit-lamp on a patient
A slit-lamp, with its high magnification, allows the
eye care professional to examine the front of the eye.


Image courtesy of the National Eye Institute


For more information visit MEDLINEplus

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