Blepharospasm

A spasmodiccontraction of the orbicularis palpebrarum muscle, so that the lids are firmly pressed againstthe globe. Occurs where photophobia is marked.It is reflex from the irritation of the fifth nerve,and occurs in neuralgia of its branches; ininflammation of the conjunctiva or cornea; fromforeign bodies; errors of refraction, etc.

Source: Ophthalmic Dictionary including pronunciation, derivation and definition of the words used in Optometry and Ophthalmology by James J. Lewis, Oph. D. Professor of Optometry in the Northern Illinois College of Ophthalmology and Otology, Chicago.