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What is a slit lamp?

Answer: 

Slit lamps are used to observe the health of your cornea, your iris and your lens.

The optician will ask you to place your head against a frame and your chin in a rest while they look through a powerful microscope at each eye.

It's also used in combination with a high powered handheld lens to provide the optician with a 3D view of the back of the eye.

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