woman eye with corneal dystrophy, keratoconus, thinning of the cornea

anatomical astigmatism blind cornea corneal correction diagnosis diagnostic disease dystrophy exam examination eye eyeball eyebrow eyelash eyesight female focus girl health human iris keratoconus lens looking loss macro medical medicine microscope ophthalmic ophthalmologist ophthalmology optic optical optician optometrist optometry patient retina sight thinning tissue topography transplant vision visual