epithelial microcysts

microcysts, epithelial

Very small, round vesicles containing fluid and cellular debris observed on the surface of the cornea under slit-lamp examination in some types of corneal dystrophy and in wearers of extended wear contact lenses, due to chronic hypoxia. They appear to originate in the basal layer of the corneal epithelium as a result of cellular necrosis. They can be seen by slit-lamp examination using a magnification of at least ✕20. If caused by extended wear contact lenses, the patient should be advised to change to daily wear contact lenses of high oxygen transmissibility. Syn. microepithelial cysts.
References in periodicals archive ?
Epithelial oedema characterises the third stage and fine epithelial microcysts are noted with irregular surface texture observed on sclerotic scatter.
Ophthalmologic consultation showed bilateral multiple diffuse corneal epithelial microcysts and mild superficial punctate epitheliopathy (Figure 1).
Systemic use at high doses may also produce corneal and conjunctival epithelial toxicity, with conjunctival hyperemia, punctate keratopathy, and corneal epithelial microcysts (4).
In patients with (ABMD) and a history of RCES, the HRT II RCM showed an abnormal epithelial basement membrane protruding forward into the corneal epithelium, the presence of epithelial microcysts and normal superficial epithelial cells and stroma.
In patients with a history of previous trauma to the involved eye, episodes of pain on awakening, and epithelial microcysts, the diagnosis constitutes minimal clinical challenge.