What could be causing intense eye pain?

Several things. Intense eye pain can be from angle closure glaucoma (associated with loss of vision), scleritis (very red eye), corneal ulcers (from contact lenses or trauma), iritis (worse in sunlight) and several other things. These are all serious problems and you should go to the er if you have this.

Related Questions

What could be causing my intense eye pain and queasiness?

Eye pain. Eye pain is often described as burning, sharp, shooting, dull, gritty, a feeling of "something in my eye, " aching, pressure, throbbing, or stabbing. Sometimes eye pain is confused with other symptoms, such as a headache, sinus pain, toothache, or a migraine.Eye pain is a common reason for people to seek medical care from their doctor (or an ophthalmologist, a specialist who deals only with eyes). Read more...
See Eye MD. Only an examination can reveal the answer to this question. Read more...