It is the motion of the eyeball during lid closure and is a reflex between the occulomotor and the facial nerves. There are 4 types-
1. Normal- Upward and outward movement of
the eyeball.
2. Inverse- Upward but inward movement.*
3. Reverse- Downward movement.*
4. Perverse- Lateral movement.
*Some authors opine that inverse is downward and outward while reverse is upward and inward.
The Bell's phenomenon is of importance in ptosis and lag ophthalmos surgeries .
-Sushrut
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