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Types of Keratoconus

Corneal Ectasia After Laser eye Surgery
Corneal Ectasia After Laser eye Surgery

Post-LASIK ectasia—or corneal ectasia—is a rare but serious complication of LASIK laser eye surgery. The condition is due to the weakening of the inner layers of the cornea, which occurs during surgery.

Corneal Hydrops
Corneal Hydrops

Acute corneal hydrops occurs in approximately 3% of patients with keratoconus. Although most cases of hydrops are associated with keratoconus due to the prevalence of the disease, the incidence of hydrops is actually higher in other corneal ectatic disorders such as pellucid marginal degeneration and keratoglobus, with some reports being as high as 11% [1-2].

Forme Fruste Keratoconus
Forme Fruste Keratoconus

The term « forme fruste keratoconus (FFKC) » was first proposed by Amsler in 1961, and then refined by Klyce et al. to define the apparently normal contralateral eye in unilateral KC, the forme fruste being « an incomplete, abortive, or unusual form of a syndrome or disease ».

image: healio.com
Keratoconus
Keratoconus

Keratoconus is caused by a decrease in protective antioxidants in the cornea. The cornea cells produce damaging by-products, like exhaust from a car. Normally, antioxidants get rid of them and protect the collagen fibers.

source: webmd.com
Keratoglobus
Keratoglobus

Keratoconus is caused by a decrease in protective antioxidants in the cornea. The cornea cells produce damaging by-products, like exhaust from a car. Normally, antioxidants get rid of them and protect the collagen fibers.

source: webmd.com
image: pixshark.com
Pellucid Marginal Degeneration
Pellucid Marginal Degeneration

Pellucid marginal degeneration (PMD), is a degenerative corneal condition, often confused with keratoconus. It is typically characterized by a clear, bilateral thinning in the inferior and peripheral region of the cornea, although some cases affect only one eye.

Posterior Keratoconus
Posterior Keratoconus

Keratoconus is a familial condition that usually starts in adolescence, affecting girls more than boys. Spectacles may help at first, the progressive distortion usually calls for correction with hard contact lenses.

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