Change in Vision
If things suddenly start to appear blurry, a dip in your blood sugar levels may be the cause. Hypoglycemia, especially in individuals with diabetes, can potentially trigger visual symptoms, such as blurred vision, “black spots,” or even double vision. Low glucose levels aren’t the only thing that can affect your eyesight, though. In fact, high blood sugar can also affect eyesight by causing lens swelling. Persistent visual changes should be discussed with your doctor as soon as possible to rule out other potential causes.