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Keratoconus begins as a bulge in your cornea, causing it to develop a cone-like shape. The change in corneal shape is gradual. It causes blurry or distorted vision due to the deflection of light by the cone shape. You may develop other complications like irregular astigmatism and progressive myopia. You may also experience light sensitivity and glare.
Diabetes affects more than your pancreas—it can also affect your eyes. As such, you need to get your blood sugar under control because it can affect your vision. You could be taking good care of yourself, ensuring your blood sugar is under control. But the longer you have diabetes, the higher the likelihood of getting diabetic eye disease.