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Keratoconus (KC) is a disorder of the eye that results in progressive thinning of the cornea. [3] The protrusion of the cornea may result in blurry vision , double vision , nearsightedness , irregular astigmatism , [ 4 ] and light sensitivity leading to poor quality-of-life .
Keratoconus, a progressive, noninflammatory, bilateral, asymmetric disease, characterized by paraxial stromal thinning and weakening that leads to corneal surface distortion. [ 2 ] Keratoglobus , a rare noninflammatory corneal thinning disorder, characterised by generalised thinning and globular protrusion of the cornea.
Keratoconjunctivitis is frequently caused by viral infections in and around the eyes. A particularly common cause of this is the herpes simplex virus.In some people, the infection may become chronic and keratoconjunctivitis may present during flare-ups of variable frequency.
Brittle-cornea syndrome is characterized by the progressive thinning of the cornea, early-onset progressive keratoglobus or keratoconus, nearsightedness, hearing loss, and blue sclerae. [5] [36] Classic symptoms, such as hypermobile joints and hyperelastic skin, are also seen often. [37] It has two types. Type 1 occurs due to variations in the ...
Pellucid marginal degeneration (PMD) is a degenerative corneal condition, often confused with keratoconus. It typically presents with painless vision loss affecting both eyes. It typically presents with painless vision loss affecting both eyes.
Corneal cross-linking (CXL) with riboflavin (vitamin B 2) and UV-A light is a surgical treatment for corneal ectasia such as keratoconus, [2] PMD, and post-LASIK ectasia. It is used in an attempt to make the cornea stronger. According to a 2015 Cochrane review, there is insufficient evidence to determine if it is useful in keratoconus. [3]
'Ordinary' keratoconus is almost never called 'anterior keratoconus', but simply as keratoconus. (A google for "anterior keratoconus" produced 182 hits; one for "keratoconus -anterior" produced 376,000). I used the qualifier there to distinguish from posterior keratoconus, which is a different disease, as did my source for that section.
Also, the alignment of the measurement can be difficult, especially with eyes that have keratoconus, a significant astigmatism, or sometimes after refractive surgery. Corneal topography instruments generate a measurement called simulated keratometry (SimK), which approximates the classic measurement of the widely used keratometer .