purpose: to compare intraocular pressure (iop) readings measured by the ocular response analyzer (ora) with those measured by the goldmann applanation tonometer (gat) in keratoconic eyes following penetrating keratoplasty (pkp) and to evaluate the influence of anatomical and biomechanical properties of the grafts on iop measurements. methods: this cross-sectional study was conducted on 45 kerat...

Background: Glaucoma is the world's leading cause of preventable irreversible blindness. The most important risk factor of glaucoma is increase in the intraocular pressure.Hence, timely screening by accurate IOP measurements is of utmost importance. In recent years, Tonopen has emerged as an alternative to Goldmann applanation tonometer which is the ‘gold standard’ for IOP measurement because o...

Material and Methods: This study was conducted in ophthalmology department PNS Shifa, Karachi. From March 2013 to Jan 2015 for 23 months. A total of 350 glaucoma suspect patients were selected. A detailed history of ocular or systemic diseases was taken. Intraocular pressure (IOP) was measured using Goldmann Applanation tonometer. Optical Coherence Tomography (OCT) images were taken using Heide...