الفهرس 
Anatomy of the CorneaOnly 14 pages are availabe for public view
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Abstract
Summary
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Summary
Keratoconus is the most common primary corneal ectatic disorder. It is a bilateral and asymmetric corneal degeneration characterized by localized corneal thinning which leads to protrusion of the thinned cornea. The incidence and prevalence in the general population in USA has been estimated to be between 5 and 23, and 5.4 per 10,000, respectively. Many studies have been conducted in different parts of the world to assess the prevalence of the disease. In Egypt, there is no many studies about prevalence of Keratoconus.
Identifying patients at risk for subclinical keratoconus and distinguishing a normal from a pathologic case at its earliest stage have been elusive goals for refractive surgeons. Recent modalities in corneal imaging as Tomography helped a lot in detecting the disease in its earliest stages.
This pilot prospective study used Pentacam (oculus) to detect the prevalence of Keratoconus / Keratoconus suspect in patients coming for LASIK for correction of Myopia or Myopic astigmatism.
The study included 389 patients, their Pentacam records were reviewed and data such as K reading, thinnest location was collected.
The study revealed a keratoconus prevalence of 7%, higher than the commonly cited figures of (0.05–0.23%) for western countries, and almost similar to other studies conducted in other parts of the Middle East as Jerusalem, Palestine and Assiri province in Saudi Arabia.