In biology, photophobia (adjective: photophobic) refers to negative response to light. Also called “light sensitivity” this is an excessive sensitivity to light and the aversion to sunlight or well-lit places. In ordinary medical terms photophobia is not a morbid fear, but an experience of discomfort or pain to the eyes due to light exposure. May be associated with excessive tearing. There can be many causes including inflammation of the iris or cornea. Extreme sensitivity to, and discomfort from, light. May be associated with excessive tearing.

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