<prompt> Characteristic feature of Herpes Simplex Keratitis is-Disciform keratitsDendritic UlcerHaabs StriaeBand keratopathy  <response>: Ans. is b i.e., Dendritic Ulcer The Dendritic ulcer is the most common presentation and is a typical lesion of herpes keratitis Most of the ocular infection are caused by HSV-1 except in neonates where eye infection can be caused by HSV-2 through infected genitalia of mother. Ocular involvement by HSV may occur in two forms: -A Primary herpes: - Typically is a unilateral blepharoconjunctivitis which is characterized by vesicles on the skin of lids, follicular conjunctivitis, preauriculars adenopathy and sometimes punctate keratitis.B Recurrent ocular herpes: - After primary infection, recurrent disease may involve any or all layers of the cornea. Recurrent herpatic keratitis is divided into: -1 Epithelial keratitis: - Manifestations of epithelial keratitis include: -i Corneal vesicles: - Vesicles coalesce and erupt to form dendritic or geographic ulcer:ii Superficial punctate keratitisiii Dendritic ulcer: - It is the most common presentation and is a typical lesion of herpes keratitis. There is an associated marked diminution of sensation.iv Geographic ulcer amoeboid ulcer2 Stromal keratitis: - Stromal keratitis may be of two types: -i Disciform keratitis: - This is due to damage to endothelial cells as a result of hypersensitivity reaction to the HSV antigen.ii Diffuse stromal necrotic keratitis: - Caused by active viral invasion and tissue destruction.3 Metaherpatic keratitis Epithelial sterile trophic ulceration: - It is not an active disease, but is a mechanical healing problem at the site of previous herpetic ulcer. 