I have a sister who wears glasses. She has been having problems reading with her glasses and does better with them off. She recently saw her eye dr and was told that she has a mass behind her eyes that is causing the problem. She goes to see a retina specialist soon. I have been having trouble the past two years myself but have never been told this was a possibility. I go yo see my ophthalmologist Monday. What specific tests and things should she check for? What is the condition called? And what should she look for specifically?