Diagnosis is done by direct observation under magnified view of slit lamp revealing the<unk>  on the cornea. The use of fluorescein stain, which is taken up by exposed corneal stroma and appears green, helps in defining the margins of the<unk> , and can reveal additional details of the surrounding epithelium. Herpes simplex<unk> s show a typical dendritic pattern of staining. Rose-Bengal dye is also used for supra-vital staining purposes, but it may be very irritating to the eyes. In descemetoceles, the Descemet's membrane will bulge forward and after staining will appear as a dark circle with a green boundary, because it does not absorb the stain. Doing a corneal scraping and examining under the microscope with stains like Gram's and KOH preparation may reveal the bacteria and fungi respectively. Microbiological culture tests may be necessary to isolate the causative organisms for some cases. Other tests that may be necessary include a Schirmer's test for keratoconjunctivitis sicca and an analysis of facial nerve function for facial nerve paralysis.
Corneal ulcer
Corneal abrasion
Band keratopathy
Bullous keratopathy
Periorbital cellulitis
Lattice corneal dystrophy
Macular corneal dystrophy
Ocular melanosis