Common Warning Signs Of Photokeratitis

Constricted Pupils

The corneal damage and inflammation caused by photokeratitis may result in constriction of the pupils. Located in the middle of the irises, the pupils allow light to enter the eyes. In healthy individuals, the pupil constricts in response to bright light; this is considered a protective mechanism. Healthy pupil size in bright light is between two to four millimeters. Constricted pupils can be assessed by an ophthalmologist. In a room with dim lighting, the ophthalmologist will direct the patient to look at an object in the distance. Next, they will shine a light into one eye at a time to check how the patient's pupil responds and to record its size. If one or both pupils are found to be an abnormal size, the eye doctor may need to perform additional examinations. Generally, constricted pupils due to photokeratitis will return to normal size within forty-eight hours. If the patient notices their pupils remain constricted beyond this period or one pupil is a different size to the other, they should see an eye health specialist as soon as possible.

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