Primary infection<unk> ic blepharitis Primary infection most commonly manifests as blepharoconjunctivitis i.e. infection of lids and conjunctiva that heals without scarring. Lid vesicles and conjunctivitis are seen in primary infection. Corneal involvement is rarely seen in primary infection. Recurrent eye infection Recurrent<unk>  of the eye is caused by reactivation of the virus in a latently infected sensory ganglion, transport of the virus down the nerve axon to sensory nerve endings, and subsequent infection of ocular surface. The following classification of<unk>  is important for understanding this disease: Dendritic ulcer (Epithelial keratitis) Fluorescein-stained cornea: geographic epithelial defects This classic<unk> ic lesion consists of a linear branching corneal ulcer (dendritic ulcer). During eye exam the defect is examined after staining with fluorescein dye. The underlying cornea has minimal inflammation. Patients with epithelial keratitis complain of foreign-body sensation, light sensitivity, redness and blurred vision. Focal or diffuse reduction in corneal sensation develops following recurrent epithelial keratitis. In immune deficient patients or with the use of corticosteroids the ulcer may become large and in these cases it is called geographic ulcer. Disciform keratitis (Endothelial keratitis) Endothelial keratitis manifests a central endothelitis in a disc-shaped manner. Longstanding corneal edema leads to permanent scarring and is the major cause of decreased vision associated with HSV. Localized endothelitis (localized inflammation of corneal endothelial layer) is the cause of disciform keratitis. Other forms * Metaherpetic ulcer : is not due to live virus, results from inability of the corneal surface to heal. * Necrotizing keratitis * Keratouveitis : is usually granulomatous uveitis with large keratic precipitates on the corneal endothelium.
Herpes simplex keratitis
Nummular keratitis
Neurotrophic keratitis
Fungal keratitis
Acanthamoeba keratitis
Diffuse lamellar keratitis
Peripheral ulcerative keratitis
Interstitial keratitis