Pellucid marginal degeneration (PMD) is a rare ectatic corneal disease involving the inferior part of the cornea. It is difficult to differentiate between keratoconus (KCN) and PMD by slit lamp, especially in the detection of early and subclinical stages of the diseases. Corneal topography is the main diagnostic tool of PMD with characteristic diagnostic patterns “crab-claw” or “butterfly.” PMD could ... إقراء المزيد

PURPOSE: To assess SARS-CoV-2 virus in conjunctival tears and secretions of positive confirmed COVID-19 patients. METHODS: A case series study that included 28 positive COVID-19 patients confirmed with nasopharyngeal swab in the period 18– 28 May 2020 at Sohag Tropical Medicine Hospital. Tears and conjunctival secretions of these confirmed positive cases were collected with disposable sampling swabs at interval of ... إقراء المزيد

PURPOSE To compare the efficacy of implanting a single Keraring segment according to a novel Q‐value‐based nomogram (QN) to that of segment implantation according to the manufacturer's standard nomogram (SN), for keratoconus treatment. METHODS This was a prospective, randomized controlled trial of 104 patients (104 eyes) with Amsler‐Krumeich grade 1 or 2 keratoconus, and type 1 or 2 cone asymmetry ... إقراء المزيد

PURPOSE: To evaluate the corneal and conjuctival manifestations of patients with positive Coronavirus Disease 2019 (COVID-19) in Sohag Province, Egypt. PATIENTS& METHODS: 63 patients who suffered from COVID-19 in the period 10–24 May 2020 at Sohag Tropical Medicine Hospital were enrolled in this study; they were subjected to anterior segment examination by the portable slit lamp or bedside examination. RESULTS: ... إقراء المزيد

The rate of laser refractive corneal surgery incredibly increased over the last two decades. Thus, the need to understand corneal imaging and how to evaluate candidates of LASIK become a crucial step to avoid long-term complications. This book aims to illustrate how to interpret the corneal tomography printout «Pentacam Corneal Tomography» with detailed case-based examples for better clinical correlation. I ... إقراء المزيد