keratoglobus


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megalocornea

 [meg″ah-lo-kor´ne-ah]
a developmental anomaly of the cornea, which is of abnormal size at birth and continues to grow, sometimes reaching a diameter of 14 or 15 mm in the adult.

ker·a·to·glo·bus

(ker'ă-tō-glō'bŭs),
Congenital anomaly consisting of an enlarged anterior segment of the eye.
[kerato- + L. globus, ball]

keratoglobus

/ker·a·to·glo·bus/ (ker″ah-to-glo´bus) a bilateral anomaly in which the cornea is enlarged and globular in shape.

keratoglobus

[-glō′bəs]
a congenital anomaly characterized by distension of the cornea and the anterior segment of the eye. Also called megalocornea.

megalocornea

An X-linked recessive, nonprogressive enlargement of the cornea to 13 mm or greater, which is present at birth; 90% of cases occur in males. The cornea and the limbus are enlarged but histologically normal. Associated findings include anterior megalophthalmos, enlarged ciliary ring with zonular stretching (leading to phacodonesis), ectopia lentis, iridodonesis, iris stromal hypoplasia, posterior embryotoxon, transillumination defects, Krukenberg spindles, trabecular meshwork pigmentation, posterior embryotoxon, Rieger anomaly, goniodysgenesis and cataracts. It is usually isolated, but may be associated with other ocular and systemic findings.

keratoglobus

A condition in which the cornea bulges abnormally causing MYOPIA and distorted vision.

keratoglobus

A rare, usually bilateral, protrusion of the cornea with general thinning, especially in the periphery. The condition is usually present at birth and generally does not progress. Some cases may be acquired perhaps as the end-stage of keratoconus. The diameter of the cornea is normal or slightly increased and the intraocular pressure is normal as the condition is not associated with congenital glaucoma. Complications include perforation after minor trauma and corneal hydrops. It is sometimes associated with Leber's congenital amaurosis, Ehlers-Danlos syndrome and blue sclera. Syn. macrocornea. See megalocornea.

keratoglobus

an anomaly in which the cornea is enlarged and globular in shape.
References in periodicals archive ?
Keratoconus, Keratoglobus, Pellucid marginal degeneration, keratectasia following refractive surgery, Stromal opacities/scars sparing Descemet's membrane and Corneal dystrophies involving anterior/deep stroma.
Introducing the 28-lens Zenlens DX set, B+L highlighted that scleral lenses are an invaluable tool for correcting issues such as keratoconus and keratoglobus.
Keratoconus is a degenerative corneal condition and forms a subtype in a group of conditions termed ectasias, derived from the Greek meaning 'dilation or distention of a tubular structure/ the other conditions being pellucid marginal degeneration and keratoglobus.
Other conditions causing cloudy cornea with these breaks (see Figure 2) include keratoglobus and congenital glaucoma, which can be ruled out by noting corneal measurements, axial length, intraocular pressure and optic disc appearance.
Tomography can also be used to identify corneal changes in keratoglobus (see Figure 5).
Keratoglobus may present with stable vision or bilateral visual impairment, and diffuse corneal thinning.
Scleral lenses are used for people with irregular corneas as a result of conditions such as keratoconus and keratoglobus, as well as following corneal transplant, traumatic injury and refractive surgery.
The primary indications for the Rose K2 XL lens are keratoconus, Pellucid Marginal Degeneration (PMD), keratoglobus and post surgical use, but it can be used on any irregular corneal condition, which cannot be successfully fitted within the limbus.
3 degeneration Keratoglobus SynergEyes PS Pentrating (Post-surgery) keratoplasty Intacs Corneal trauma SynergEyes MF Simulataneous multifocal lens for presbyopia Duette Astigmatic and Flex20 (SiHy) spherical ametropia, Dk 84 with normal corneas Lens Name RGP Centre ClearKone Paflufocon D Dk 145 SynergEyes PS (Post-surgery) SynergEyes MF Duette MaxVU Dk 130 Table 4 Material and Dk values of the FlexLens for piggyback systems Material Dk Hefilcon A 13.