Causes of Photokeratitis


Photokeratitis often occurs at high altitudes where there is highly reflective snow.  It is termed radiation keratitis and snow blindness if it occurs due to reflection from the snow.  Sunlight reflecting off of sand and water further increases exposure to ultraviolet (UV) radiation and can cause photokeratitis.  The condition may also occur with a solar eclipse or by lightening, although these circumstances are very rare.  Artificial sources of UVB rays can also cause photokeratitis.  Examples include sun tanning beds, photographic flood lamps, electric sparks and even halogen desk lamps. 

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