red eye droopy eyelid headaches

i experience random red-eye with fuzzy vision, droopy eye-lid and headaches. it could last days, even weeks, then disappear for just as long. i've been through several tests, including an mri and ct scan. i've seen an opthamologist, neurologist, cornea specialist, retina specialist and plastic surgeon. the only conclusion, thus far, is that i have fluid leaking into my retina. however, they feel that this is not provoking the other symptoms i am experiencing. what are some possibilities of diagnoses.