Corneal Ring

An annular surface ulcer of the corneal limbus, which corresponds to coalesced ulcers, in a background of marginal keratitis
Etiology Infections—e.g., dysentery, brucellosis, dengue, gonorrhea, hookworms, influenza, TB; connective tissue disease—e.g., SLE—periarteritis nodosa, rheumatoid arthritis, scleroderma, Sjögren syndrome; others—e.g., gold intoxication, ischemia, lethal midline granuloma, leukemia, porphyria, ulcerative colitis, Wegener’s granulomatosis
Segen's Medical Dictionary. © 2012 Farlex, Inc. All rights reserved.
References in periodicals archive ?
At the congress, Dr Arbelaez presented papers on myopia correction, single step transepithelial PRK (TransPRK) with SmartPulse Technology and the combination of this procedure with XTRA (Accelerated Crosslinking) to strengthen the cornea, as well as the new asymmetric intra corneal ring segments (ICR Keraring AS).
Influence of intrastromal corneal ring segment implantation on corneal biomechanical parameters in keratoconic eyes.
Intrastromal corneal ring segments implantation could be also a viable option for effective correction of post-DALK astigmatism [7].
Collagen cross-linking (CXL) and intrastromal corneal ring segments implantation (ICRS) are alternative procedures for KC treatment.
Intacs, also known as intrastromal corneal ring segments (ICRS) is used to manage patients with keratoconus, as an alternative to contact lenses or transplant surgery.
It differs from excimer laser procedures such as Photorefractive Keratectomy (PRK), Laser-Assisted Instrastromal In Situ Keratomileusis (LASIK), and traditional incisional surgeries such as Radial Keratotomy (RK) because no incisions or laser ablations are used to cut or irretrievably remove corneal tissue; and from Intra Corneal Ring (ICR) and Intraocular Lens (IOL) procedures because nothing is inserted into the eye.
For persons who fear poor results from excimer laser surgery or who don't want to risk wound-healing complications, an alternative is the intrastomal corneal ring (ICR).
The Intrastromal Corneal Ring, 7 millimeters in diameter, is inserted into the cornea's periphery, around the lens.
Contributors explain the needs and future potential of retinal prosthetic devices, then get specific with information on retina implants (including noninvasive models), visual prostheses that improve reading, subretinal micro-implants for retinitis pigmentosa, electrode architecture for retinal interfaces, circuit designs that model the properties of the outer and inner retina, retinal stimulation with surface electrode arrays, Glaucoma drainage, corneal regeneration, toric lenses in correction of postkeratoplasty, artificial lenses for the treatment of high myopia, a telescoping prosthetic device and internal corneal ring segments for keratoconus.
And then measurement is performed using a 3.06 mm diameter corneal ring under the cobalt blue.
(2) Furthermore, as in our Case # 2, the signs and symptoms related to topical anesthetic abuse can masquerade as Acanthamoeba keratitis because of similarities such as disproportionate pain, use of bandage contact lenses, and corneal ring infiltration.
Therefore, some treating physicians choose to implant intrastromal corneal ring segments to flatten and stabilize the cornea, to improve vision, and, in some cases, enable the use of contact lenses [3].