Palpebral fissure

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Palpebral fissure
Front of left eye with eyelids separated to show medial canthus. (Palpebral fissure, visible but not labeled, is artificially widened.)
Latin rima palpebrarum
Gray's subject #227 1025
Dorlands/Elsevier r_14/12711768

Palpebral fissure is the anatomic name for the separation between the upper and lower eyelids. In the adult this measures about 10mm vertically and 30 mm horizontally.

It can be reduced in size in fetal alcohol syndrome.[1]

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