Father is partially blind. he is taking medication for hypertension. is hypertension a cause for this ?

Maybe related: Patients with hypertension are more likely to develop eye disease. They are a greater risk for vascular diseases that can affect the retina such as vein occlusions, and optic nerve disease such as non-arteritic ischemic optic neuropathy. If your father has diabetes, hypertension can exacerbate diabetic macular edema a common cause of visual loss in diabetics. Go to your eye doctor to be sure.