With a stroke, it is quite evident that it is not neurologic. Keep in mind, the eye is the ONLY part of the body that one can visualize blood vessels w/o piercing the skin. We can actually see the "pulsing" of the vein. With a stroke, we can often see the actual plaque blocking the blood supply as well.
There are 4 common strokes in the eye.
CRAO Central Retinal Artery Occlusion
CRVO Central Retinal Vein Occlusion
BRAO Branch Retinal Artery Occlusion
BRVO Branch Retinal Vein Occlusion
Either of the "central" occlusions are more devastating to sight as blood is cut off from a good majority of the retina. Either of the "branch" occlusions usually involve a smaller area/quadrant of the eye...may or may not affect the fovea (center/bulls eye of the retina). Regardless, be sure he seeks the consult of the retinal ophthalmologist and not a general ophthalmologist....someone up to speed with latest surgical/laser options. There are options to possibly reabsorb some of the hemorrhaging...therefore, improving visual acuity. Time is key though, sooner the better of course. Next step is to check into systemic disorders as other poster mentioned...hypertension, diabetes, cardiovascular disease. He will likely be placed on a blood thinner (likely already done)..warfarin, coumadin, aspirin, etc.
Good luck.
Jeff
He is 60 years old.
