Search results
Results from the WOW.Com Content Network
Keratoconus is the most common grounds for conducting a penetrating keratoplasty, generally accounting for around a quarter of such procedures. [60] The corneal transplant surgeon trephines a lenticule of corneal tissue and then grafts the donor cornea to the existing eye tissue, usually using a combination of running and individual sutures.
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. [3]
However, it may not be as specific as corneal pachymetry, because corneal topography only evaluates the degree and distribution of surface irregularities on the cornea, not the thickness of the cornea. [5] Corneal topography may show a "crab claw-like" appearance, a finding that is seen in both keratoconus and in pellucid marginal degeneration.
(H18.6) Keratoconus — degenerative disease: the cornea thins and changes shape to be more like a cone than a parabole (H19.3) Keratoconjunctivitis sicca — dry eyes (H20.0) Iritis — inflammation of the iris (H20.0, H44.1) Uveitis — inflammatory process involving the interior of the eye; Sympathetic ophthalmia is a subset.
Dry eye syndrome can lead to blurred vision, instability of the tear film, increased risk of damage to the ocular surface such as scarring of the cornea, and changes in the eye including the neurosensory system. [2] [6] Dry eye occurs when either the eye does not produce enough tears or when the tears evaporate too quickly. [2]
It is caused when aqueous humour fails to adequately drain from the eye, resulting in pressure build-up. [10] Keratoconus: vision problems can be caused when the cornea thins and distorts into a conical shape. While the cause is unknown, Keratoconus is believed to be congenital, and can be exacerbated by allergies and eye rubbing. [11]
Corneal hydrops is an uncommon complication seen in people with advanced keratoconus or other corneal ectatic disorders, [1] and is characterized by stromal edema due to leakage of aqueous humor through a tear in Descemet's membrane. [2]
Superior limbic keratoconjunctivitis (SLK, Théodore's syndrome [1]) is a disease of the eye [2] characterized by episodes of recurrent inflammation of the superior cornea and limbus, as well as of the superior tarsal and bulbar conjunctiva. [3] It was first described by F. H. Théodore in 1963. [4]