To test for nocturnal lagophthalmos, the head is tilted back, as if in a prone position, and the eyes are closed. If there is a gap between the upper and lower eye lids, tear film may evaporate during sleep. Sometimes the head is tilted forward.
To test for nocturnal lagophthalmos, the head is tilted back, as if in a prone position, and the eyes are closed. If there is a gap between the upper and lower eye lids, tear film may evaporate during sleep. Sometimes the head is tilted forward.