Cornea

Corneal infection by Acanthamoeba is a rare occurrence. Patients are most often soft contact lens wearers, although this is not universal; additional historical elements may include recent ocular trauma and exposure to soil or contaminated water.

Signs and Symptoms A patient with bacterial keratitis will present with a typically unilateral, painful, photophobic, injected eye. Visual acuity may be reduced, and profuse...

Signs and Symptoms Band keratopathy can afflict any patient regardless of age, sex or race. Early in the course of the disease, individuals tend to...

Signs and Symptoms Corneal abrasion is one of the most common urgent clinical entities in practice.1-11 Patients present with some or all of the following:...

Signs and Symptoms Typically, corneal foreign body injuries present as an emergency following acute injury, making them a common urgent clinical entity of ophthalmic practice.1-12...

Signs and Symptoms Epithelial basement membrane dystrophy (EBMD), also known as anterior basement membrane dystrophy and Cogan’s microcystic dystrophy, is one of the more commonly...

Signs and Symptoms Patients with filamentary keratitis typically present with variable reports of ocular discomfort, ranging from grittiness and mild foreign body sensation to pronounced...

Signs and Symptoms First described by Austrian ophthal-mologist Ernst Fuchs in 1910, the endothelial disorder that bears his name is a bilateral—though often asymmetric—condition, and...

Signs and Symptoms Granular corneal dystrophy is a bilateral condition that affects the central regions of the corneal stroma while sparing the periphery.1-3 Two distinct...

Signs and Symptoms The herpes simplex virus (HSV) is a common pathogen in developed regions of the world and a frequent source of ocular infection....

Signs and Symptoms Immune stromal keratitis (ISK), historically referred to as interstitial keratitis, may be seen as either an active corneal inflammation or as an...

Keratoconus is the most common cause of degenerative corneal ectasia worldwide and the single most common reason for keratoplasty in the developed world. It is a non-inflammatory pathology wherein the cornea aberrantly assumes a cone shape, leading to corneal protrusion, tissue thinning, myopia, irregular astigmatism, metamorphosis and vision impairment.

Signs and Symptoms Marginal keratitis is defined as a peripheral corneal inflammatory response.1-4 The condition is also known as sterile keratitis, infiltrative keratitis, peripheral keratitis,...

Signs and Symptoms A number of corneal anomalies are present at birth. They may be caused by idiopathic genetic alterations, mutations or exposure to a...

Signs and Symptoms Mooren’s ulcer represents an idiopathic, inflammatory, marginal or peripheral ulceration of the cornea. There are two recognized presentations, which were initially described...

Signs and Symptoms Patients with Salzmann’s nodular degeneration are often asymptomatic, particularly in the early stages of the disease. Some may present with subjective glare,...

Terrien’s marginal degeneration is one of the peripheral corneal degenerations. The entity has been recognized for more than 90 years. It may be unilateral or bilateral, affect individuals at any age

Signs and Symptoms Thygeson’s superficial punctate keratitis (TSPK) represents a corneal epitheliopathy of unknown etiology. It was first described in 1950 by Phillips Thygeson as...

Toxic keratoconjunctivitis (TKC), sometimes referred to as chemical keratitis or toxic follicular conjunctivitis, describes a condition in which the ocular surface is exposed to a noxious substance either acutely or chronically, with resultant deleterious effects to the structure and function of these tissues.

Signs and Symptoms Traumatic corneal lacerations and perforations are invariably accompanied by a recent history of ocular injury. Typically, this involves a sharp object such...

Vortex keratopathy, also known as corneal verticillata, describes a unique presentation of corneal deposition in a classic arborizing or whorl-shaped pattern. The condition occurs secondary to exogenous medications or systemic disease.