Correction of corneal astigmatism is a key element of cataract surgery, since post-surgical residual astigmatism can compromise the patient's uncorrected visual acuity. Toric intraocular lenses (IOLs) compensate for corneal astigmatism at the time of surgery, correcting ocular astigmatism. They are a predictable treatment. However, accurate measurement of corneal astigmatism is mandatory for ch...

PURPOSE The purpose of this study was to determine an arcuate incision (AI) nomogram to treat astigmatism during femtosecond laser-assisted cataract surgery. METHODS This is a retrospective, cohort study. Femtosecond laser (FSL)-assisted transepithelial AIs were created at a 9.0 mm optical zone, 80% depth, centered on the limbus. We modified the manual Donnenfeld limbal relaxing incision nomo...

AIMS To evaluate visual function and vision specific health status in patients undergoing penetrating keratoplasty for keratoconus. METHODS A prospective longitudinal study measuring logMAR visual acuity, contrast sensitivity, disability glare, binocular visual field, stereoacuity, and subjective visual function (VF-14) was conducted on 18 patients with keratoconus undergoing penetrating kera...

Clinical cards of all cataract patients operated on in the eye centre of the University of Port Harcourt Teaching Hospital (UPTH) between 2002 and 2006 were studied. The study comprised 114 eyes of 100 patients who had cataract surgeries done within the 5-year period of this study. The age of the patients ranged from 6 months to 94 years with mean age of 58.84±19.57years. Data obtained from the...

PURPOSE To compare the clinical outcomes between deep anterior lamellar keratoplasty (DALK) and penetrating keratoplasty (PKP) with same-size grafts in patients with keratoconus. METHODS Medical records of 16 eyes from 15 patients treated from June 2005 through April 2011 were retrospectively reviewed. Patients with contact lens intolerance or who were poor candidates for contact lens fitting...

PURPOSE To investigate the effectiveness of femtosecond laser-assisted intrastromal relaxing incisions for astigmatism management and establish laser treatment parameters. METHODS Sixteen eyes of 16 patients had regular astigmatism after penetrating keratoplasty. All sutures had been removed and the refraction was stabilized. Paired arcuate intrastromal incisions were made 180° apart within t...

The term irregular astigmatism is often applied to a distorted corneal topography, whereby two major meridians may not even be easily identified; in simple terms, it can be defined as an “unrefractable” eye. As a consequence, visual function can be severely affected. Conventional treatments are often insufficient and/or unsatisfactory. Spectacles may lead to intolerable aniseikonia, and contact...

INTRODUCTION Descemet's stripping automated endothelial keratoplasty (DSAEK) venting incisions may induce irregular corneal astigmatism. The study examines in vivo and in vitro astigmatic effects of venting incisions. PATIENTS AND METHODS In vivo analysis examined eleven eyes of eleven patients who had received DSAEK with venting incisions. A chart review of the eleven eyes including assessme...

PURPOSE To evaluate and investigate the distribution and repeatability of anterior corneal surface astigmatism measurements (axis and magnitude) using a novel corneal topographer. METHODS Anterior corneal surface astigmatism was investigated in a total of 195 eyes using a novel multicolored spot reflection topographer (Cassini; i-Optics). Two patient groups were studied, a younger-age group A...

PURPOSE To assess the outcome of Ferrara intracorneal ring segments for keratoconus. SETTING Private practice and university hospital, Porto Alegre, Brazil. METHODS In this retrospective noncomparative interventional case series, 51 keratoconus eyes of 47 patients that had Ferrara intracorneal ring segment implantation were reviewed. Uncorrected visual acuity (UCVA), best spectacle-correcte...