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Nictation (Noun)

A reflex that closes and opens the eyes rapidly.

Nouns denoting acts or actions.

The baby's nictation was a natural reflex that helped her eyes adjust to the bright light.
During the medical examination, the doctor observed the patient's nictation to check for any signs of neurological damage.
The researcher studied the nictation of the subjects to understand the relationship between eye movement and cognitive function.
After the eye surgery, the patient's nictation was slower than usual, but it gradually returned to normal.
The newborn's nictation was so rapid that it was almost imperceptible to the naked eye.