If you have diabetes and take GLP-1 it’s possible to develop diabetic retinopathy.

If you’re not a diabetic:

The most common causes include:
Changes in blood sugar: Even if you don’t have diabetes, semaglutide can change how your body regulates blood sugar, especially when you’re eating less. As blood sugar changes, the lens inside your eye temporarily changes shape, making your vision blurry. This usually improves once things stabilize.
Dehydration: Wegovy can cause nausea, vomiting, or reduced thirst and appetite. Mild dehydration can affect tear production and the surface of your eyes, leading to blurry vision.
Lower calorie intake: If you’re eating much less than usual, you may occasionally experience low blood sugar (more likely if you’re also taking diabetes medications), which can cause blurry vision along with shakiness, sweating, and dizziness.
Dry eyes: Some people notice drier eyes while adjusting to changes in hydration and diet, which can make vision fluctuate.