OXFORD DICTIONARY
nictitate, v.intr. close and open the eyes; blink or wink.
nictitating membrane a clear membrane forming a third eyelid in amphibians, birds, and some other animals, that can be drawn across the eye to give protection without loss of vision.
nictitation n.
med.L nictitare frequent. of L nictare blink
ROGET THESAURUS
nictitate
Dimsightedness
VB
be dimsighted, see double, have a mote in the eye, have a mist before the eyes, have a film over the eyes, see through a prism, see through a glass darkly, wink, blink,
nictitate, squint, look askant, askant askance, screw up the eyes, glare, glower, nictate, dazzle, loom.