When the structure of the cornea is not strong enough to hold the round shape and the cornea bulges outward like a cone -- this condition is called keratoconus. It's caused by a decrease in protective antioxidants in the cornea.
Double vision when looking with just one eye, Objects both near and far looking distorted, Bright lights looking like they have halos around them, Lights streaking, Seeing ghost images, Being uncomfortable driving due to blurry vision
The doctor will diagnose via conducting thorough vision assessment test and examining the topography of the cornea and conducting an orb scan
It is treatable with special eye glasses. If eye-glasses don't provide adequate vision then rigid gas permeable contact lenses are recommended. In the case of progressive keratoconus, a CXL (Collagen Cross-Linking) procedure performed with UV lasers is recommended