Prevalence of ectatic corneal conditions among keratorefractive candidates
نویسندگان
چکیده
منابع مشابه
Corneal Wound Healing After Keratorefractive Procedures
Bowman’s layer is composed of 22nm heterotypical type I collagen fibrils, which are randomly orientated (mean direction 45o to the corneal surface). Immediately beneath Bowman’s membrane, the cornea is arranged such that there are about 300 lamellae centrally and 500 lamellae peripherally. Each is composed of uniformly paralleldirected, 25nm heterotypical type I collagen fibrils with flattened ...
متن کاملSurgical management of ectatic corneal disorders
Over the last decade there has been a paradigm shift from penetrating keratoplasty (PKP) to lamellar keratoplasty for the management of primary as well as acquired corneal ectasia. Several treatment modalities have emerged including collagen cross-linking, intrastromal implants, laser vision correction, and recent techniques in central and peripheral lamellar keratoplasty. This article reviews ...
متن کاملCorneal Biomechanics in Ectatic Diseases: Refractive Surgery Implications
BACKGROUND Ectasia development occurs due to a chronic corneal biomechanical decompensation or weakness, resulting in stromal thinning and corneal protrusion. This leads to corneal steepening, increase in astigmatism, and irregularity. In corneal refractive surgery, the detection of mild forms of ectasia pre-operatively is essential to avoid post-operative progressive ectasia, which also depend...
متن کاملCalculations of actual corneal astigmatism using total corneal refractive power before and after myopic keratorefractive surgery
PURPOSE To calculate actual corneal astigmatism using the total corneal refractive astigmatism for the 4-mm apex zone of the Pentacam (TCRP4astig) and keratometric astigmatism (Kastig) before and after photorefractive keratectomy or laser in situ keratomileusis. METHODS Uncomplicated 56 eyes after more than 6 months from the surgery were recruited by chart review. Various corneal astigmatisms...
متن کاملSurgical technique: coupling of intrastromal corneal ring segments for ectatic corneal disorders in eye bank corneas
The management of corneal ectasia is evolving, with intrastromal corneal ring segments playing an important role in delaying or eliminating the need for penetrating keratoplasty. This paper describes a modification in the implantation technique of intrastromal corneal ring segments that allows for coupling of the two segments with suture, affording more structural support.
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Journal of the Egyptian Ophthalmological Society
سال: 2019
ISSN: 2090-0686
DOI: 10.4103/ejos.ejos_22_19