A Slit-lamp is an medical instrument that your optometrist will use to examine the health of your vision. The Slit Lamp, also called a biomicroscope, provides your optometrist a magnified view of the internal structures the eye. This view includes the lens behind the pupil, which allows your eye doctor to thoroughly exanimate your eyes signs of infection or disease.
The slit lamp is an illuminated binocular microscope, mounted on a tall table that includes a chin rest and head band to position the patient's head comfortably. With the help of hand-held lenses, your optometrist can also use the slit-lamp to examine the retina (the light-sensitive inner lining of the back of the eye.)