While you may not notice anything wrong in its very early stages, an optometrist may tell you that you have early signs of keratoconus. Unchecked, you’ll notice an inability to focus properly, mild blurring of vision, slightly distorted vision, where straight lines look bent or wavy. You may have an increased sensitivity to light and glare. You may see redness in your eyes and experience swelling. You may be getting worse, quickly.