My sister in law is on hydroxychloroquine for rhuemetoid arthritis. She has difficulty taking any mess because she reacts. She was in a pool yesterday exercisingin the sun, felt like she got eg. Suntan lotion in her eye. By evening both eyes were burning and hurting and very sensitive to light. She is still experiencing light sensitivity and pain today. Since she is from Canada and presently on holidays in USA, and her doctor cannot be reached until Monday, I am wondering how serious this is, what could it be, and what you recommend she do until Monday.