Wednesday, August 28, 2019

Bell's phenomenon

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 .


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