1.Glaucoma
There are several types, but they all put pressure on the optic nerve at the back of your eye that connects to your brain. You may not have symptoms at first, or you might start to lose your side vision. But you don’t notice because it happens so slowly. If you don’t treat it, the pressure can lead to permanent vision loss.
2.Cataracts
When the lens of your eye looks cloudy, it’s called a cataract. This blocks light, and everything looks hazy. Poor control of blood sugar can speed up the process. You’re more likely to get cataracts with diabetes — and you’ll probably get them at a younger age. Surgery can replace the cloudy lens with a clear artificial one, but diabetic retinopathy sometimes gets worse afterward if your blood sugar isn’t under good control.