It seems from the history that you are having glaucoma
and for glaucoma you are on treatment with timolol, brimonidine and latanoprost
. Along with this you are on atrovastatin for treatment of elevated cholesterol
The symptoms you are having like pain behind the eye and blurring of vision may not be related to side effects of drugs. They indicate increase in intraocular pressure
and hence you need to undergo examination by ophthalmologist or preferably by a glaucoma specialist for evaluation of glaucoma.