THE EXCENTRIC ASTIGMATISM PRK, A PHOTOREFRACTIVE METHOD TO CORRECT CORNEAL ASTIGMATISM USING TEE 193-NM EXCIMERLASER HUETZ,W.W., EOFFMANN,P.C., ECKHARDTJ3.B. Pumore: The Excentric Astigmatism PRK is a method to correct comeal astigmatism with two peripheral ablations which are performed outside an untreated central zone. Method% Two peripheral ablations of 3.4 mm diameter are performed outside ...

AIM To determine the relation between epithelial hyperplasia and regression of effect after photorefractive keratectomy (PRK). METHODS Seventy unilaterally treated patients with PRK were examined. All eyes had been treated with the Summit excimer laser 27 (SD 7) months previously with zone diameters of 4.1 to 5.0 mm. The untreated fellow eyes served as controls. Epithelial thickness was measu...

To report the possibility of post myopic photorefractive keratectomy (PRK) haze treatment in a patient with expressed reluctance for any additional laser therapy. Seven months after bilateral PRK with subsequent development of corneal haze and refractive regression in both eyes, a 37-old-year male patient presented a best-spectacle corrected visual acuity (BSCVA) of 20/30 in the right eye and o...

PURPOSE An increase in corneal temperature has been implicated in subepithelial haze after surface photorefractive keratectomy. We aimed to determine if cooling the cornea by means of hydration between ablations and immediately after final surface ablation in PRK reduces haze. METHODS One hundred five eyes of 61 patients with myopia ranging from -6.00 to -9.75 D were included. One of the surg...

INTRODUCTION Chilled saline is commonly used to irrigate the ocular surface after photorefractive keratectomy (PRK) and is often considered by the patients to be uncomfortable. Room temperature (non-chilled) saline may be a safe and less painful alternative. OBJECTIVES To compare pain and visual outcomes after irrigating the ocular surface with chilled saline versus room temperature saline in...

Purpose: To compare changes in posterior corneal elevation, anterior chamber depth (ACD), anterior chamber volume (ACV) and corneal volume (CV) after laser in situ keratomileusis (LASIK ) and photorefractive keratectomy (PRK) for low to moderate myopia by pentacam imaging Methods: In this prospective comparative case series, 105 consecutive myopic eyes randomly scheduled for LASIK (n=59) or PRK...

PURPOSE To evaluate the optical quality after laser in situ keratomileusis (LASIK) or serial photorefractive keratectomy (PRK) using a double-pass system and to follow the recovery of optical quality after laser vision correction. METHODS This study measured the visual acuity, manifest refraction and optical quality before and one day, one week, one month, and three months after laser vision ...

PURPOSE To evaluate the efficacy and safety of topographically guided excimer laser photoablation to retreat unsuccessful myopic and hyperopic photorefractive keratectomy (PRK) and laser in situ keratomileusis (LASIK). SETTING Eye Clinic, San Salvatore Hospital, University of L'Aquila, L'Aquila, Italy. METHODS At least 3 months after primary PRK (Group A) or primary LASIK (Group B), 48 eyes...

PURPOSE The corneal change induced by refractive procedures influence both the postoperative refractive status and the ocular spherical aberration (SA). We evaluated changes in corneal SA after three types of surface ablation: phototherapeutic keratectomy (PTK), myopic photorefractive keratectomy (PRK), and myopic wavefront-guided laser epithelial keratomileusis (LASEK). METHODS Twenty-six ey...

PURPOSE To describe the incidence and risk factors associated with microbial keratitis in a large population of laser vision correction (LVC) patients. SETTING Optical Express centers, Glasgow, United Kingdom. DESIGN Retrospective case series. METHODS Records were searched to identify all cases of presumed microbial keratitis after LVC between January 1, 2008, and April 1, 2015. Consecuti...