Your eye issue at first reminded me of the prodroma or aura Cleo would get with classic migraine symptoms; HOWEVER, the light headedness, low BP, fainting, could be either medicinally related or present another issue your General Practitioner should know about. I have not had this combo, except when on a blood pressure management med which gave me a 79 over 39 and I was near to passing out especially upon standing up.

See your doc, please?
Mark56:hug :