BASICS DESCRIPTION • Uncommon, usually unilateral, affects conjunctiva and/or cornea • Seen more commonly in children and young adults • Due to type IV hypersensitivity reaction to microbial agents •…

BASICS DESCRIPTION • Named after the French ophthalmologist Albert Terson who described the condition in 1900 • Originally defined as vitreous hemorrhage in the setting of subarachnoid hemorrhage • Definition…

BASICS DESCRIPTION Blood that is under the conjunctiva. This can be spontaneous, associated with incidental trauma or obvious trauma, or recurrent, which may be associated with underlying systemic disease. RISK…

Sunir Garg BASICS DESCRIPTION • Lens-induced uveitis results from an autoimmune reaction to crystalline lens protein released from surgical or accidental trauma (phacoantigenic endophthalmitis) or leaked from a hypermature cataract…

BASICS DESCRIPTION Retinal microaneurysms are focal dilations of retinal capillaries that appear as tiny red dots in the retina on ophthalmoscopy. They are most commonly found in the macula and…

BASICS DESCRIPTION Toxic keratoconjunctivitis is an inflammation of the bulbar and palpebral conjunctiva with corneal involvement due to exposure to foreign substance(s). RISK FACTORS • Use of topical ophthalmic medications,…

Susan WhitmerMargaret E. M. Scott BASICS DESCRIPTION • Leber hereditary optic neuropathy (LHON) is usually a unilateral acute or subacute painless profound visual loss (20/200 or worse), followed in weeks…

Carol L. Shields BASICS DESCRIPTION • The term “ocular surface squamous neoplasia (OSSN)” describes a spectrum of conjunctival and corneal epithelial dysplasia ranging from conjunctival/corneal intraepithelial dysplasia (CIN) to squamous…

BASICS DESCRIPTION Schnyder’s corneal dystrophy (SCD) is a rare bilateral condition characterized with slowly progressive abnormal deposition of lipids in the cornea. EPIDEMIOLOGY Incidence • Unknown • Worldwide largest pedigree…

BASICS DESCRIPTION • A full thickness defect in the neurosensory retina. • May be round/oval (retinal hole), horseshoe shaped (retinal tear), irregularly shaped or semicircular/adjacent to the ora serrata (dialysis)….