Im not medical student or doctor but i will try to use any logic haha Can be any kind of myopia or tumor. I dont know name of disease but this is my logic hahahah maybe im worong.
Keratoconus ; cornea thins and gradually bulges outward into a cone shape. A cone-shaped cornea causes blurred vision and may cause sensitivity to light and glare. Keratoconus usually affects both eyes and generally occurs in people ages 10 to 25.