Hello and thanks for your question. It sounds as though he may have a corneal abrasion or corneal ulcer (infected corneal abrasion). For this reason I think he needs to see an ophthalmologist to get this properly diagnosed. He should be feeling better after 48 hours if nothing were seriously wrong. Does that make sense?
You can also start using some artificial tears 4-5x/day and some cool compresses to see if that helps him feel better. But if this doesn't cause a fairly quick improvement in his symptoms, then i would take him to an ophthalmologist.
Do you have any other questions about this that I can help you with?
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My opinion is solely informative and does not constitute a formal medical opinion or recommendation. For a formal medical opinion and/or recommendation you must see an eye doctor.