Definition Preoperative preparation prior to planned lens extraction. Key Features Ophthalmic and medical considerations in the preoperative evaluation of lens surgery include: • The morphology of lens opacities and the…
Definition Limbal stem cell deficiency is a devastating condition that can occur as the end result of a diverse set of etiologies. There are multiple surgical options to treat this…
Definition A multifactorial disease of the ocular surface characterized by deficient tear production and/or excessive tear evaporation, leading to loss of homeostasis of the tear film. Key Features • Symptoms:…
Definition Disorders with corneal, external, and other anterior segment manifestations of systemic diseases and syndromes. Key Feature • External and anterior segment ocular anomalies as well as systemic abnormalities. Associated…
Definition An inherited, bilateral disorder in which an abnormal substance accumulates in the cornea. Key Features • Characteristically bilateral. • Progressive. • Isolated to the cornea. Associated Features • Usually…
Definition Secondary deterioration or deposition in the cornea, distinct from dystrophies. Key Features • Common. • Bilateral usually. • Typically does not affect vision. Associated Features • Increased prevalence with…
Definition Developmental abnormalities of the cornea present at birth. Key Features • Inherited or sporadic but not acquired. • Generally involve dysgeneses of anterior segment mesenchyme. • Frequent association with…
Definition Diseases affecting the innermost layer of the cornea, which is in charge of regulating the hydration state of the corneal stroma. Key Features • Bilateral presentation. • Corneal clarity…
IN THIS CHAPTER Additional content available online at ExpertConsult.com Definition A normally transparent intraocular structure whose function is to alter the pathway of light that has entered the eye to…
Definition Herpes simplex viral infection of the cornea. Key Features • Dendritic ulcer: classic feature of epithelial disease. • Focal endotheliitis (disciform keratitis): classic feature of stromal disease. Associated Features…
