Diabetes can affect the eyes in several ways:

1. Diabetic Retinopathy: This is the most common eye complication of diabetes.

2. Macular Edema: Diabetic retinopathy can lead to macular edema, where fluid accumulates in the macula (the center of the retina).

3. Cataracts: People with diabetes are more likely to develop cataracts at a younger age.

4. Glaucoma: Diabetes can increase the risk of developing glaucoma, which is a group of eye conditions that can damage the optic nerve, leading to vision loss. 

5.Vision Changes: Diabetes can cause rapid changes in blood sugar levels, leading to temporary changes in vision, such as blurriness

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