Hello, today I visited Ophthalmologist because I have ghosting vision when looking on white on black background or at night. Also my day vision got a bit worse but not as much as at night. I have this till summer 2016 and appeared suddenly when I saw moon like 1,5 times. I am 19yo. Ophthalmologist told me that I have irregular astigmatism based on some machine test in both eyes (90° and 86°). And my DLI index in left eye is 5,57 (right eye 10). What does it mean? Does it mean I have keratoconus? Thanks