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Posterior keratoconus, a distinct disorder despite its similar name, is a rare abnormality, usually congenital, which causes a nonprogressive thinning of the inner surface of the cornea, while the curvature of the anterior surface remains normal. Usually only a single eye is affected. [20] Post-LASIK ectasia is a complication of LASIK eye surgery.
Posterior keratoconus, a rare condition, usually congenital, which causes a nonprogressive thinning of the inner surface of the cornea, while the curvature of the anterior surface remains normal. Usually only a single eye is affected. Post-LASIK ectasia, a complication of LASIK eye surgery. [5]
Post-LASIK ectasia is a condition similar to keratoconus where the cornea starts to bulge forwards at a variable time after LASIK, PRK, or SMILE corneal laser eye surgery. [1] However, the physiological processes of post-LASIK ectasia seem to be different from keratoconus.
While corneal topography relies on reflected light from the front (anterior) of the cornea, a technique called corneal tomography also provides a measure of the back (posterior) shape of the cornea. [ 11 ] [ 12 ] [ 13 ] A measure called CorT total includes this posterior corneal data and more accurately reflects refraction compared with regular ...
Beginning in 1936, Japanese ophthalmologist Tsutomu Sato conducted research in anterior and posterior keratotomy, an early form of refractive surgery that attempted to treat keratoconus, myopia and astigmatism by making incisions in the cornea. [20] Enhanced flattening was noted with longer and deeper incisions.
'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.
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.
Axenfeld–Rieger syndrome is a rare autosomal dominant [2] disorder, which affects the development of the teeth, eyes, and abdominal region. [3]Axenfeld–Rieger syndrome is part of the so-called iridocorneal or anterior segment dysgenesis syndromes, [4] which were formerly known as anterior segment cleavage syndromes, anterior chamber segmentation syndromes or mesodermal dysgenesis.