Source : Webster's Revised Unabridged Dictionary (1913)

Photophobia \Pho`to*pho"bi*a\, n. [NL., fr. Gr. fw^s, fwto`s,
   light + ? fear.] (Med.)
   A dread or intolerance of light. --Sir T. Watson.

Source : WordNet®

photophobia
     n 1: a morbid fear of light
     2: pain in the eye resulting from exposure to bright light
        (often associated with albinism) [syn: {photalgia}]