Acutely, early symptoms include a painful, photophobic, red watery eye. This is due to active corneal inflammation resulting in vascular invasion and stromal necrosis which can be diffuse or localized. This causes the pinkish discoloration of what was a clear transparent normal corneal tissue (called Salmon patch of Hutchinson). Such vascularization is likely to result in blurring of vision secondary to corneal stromal scarring, the presence of ghost vessels, and thinning of the cornea, especially if it involves the visual axis.
Interstitial keratitis
Peripheral ulcerative keratitis
Nummular keratitis
Neurotrophic keratitis
Granular corneal dystrophy
Diffuse lamellar keratitis
Lattice corneal dystrophy
Macular corneal dystrophy