Comparing surgically induced astigmatism calculated by means of simulated keratometry versus total corneal refractive power
نویسندگان
چکیده
منابع مشابه
Comparison of Corneal Power and Astigmatism between Simulated Keratometry, True Net Power, and Total Corneal Refractive Power before and after SMILE Surgery
Purpose. To compare the mean corneal power (Km) and total astigmatism (Ka) estimated by three methods: simulated keratometry (simK), true net power (TNP), and total corneal refractive power (TCRP) before and after femtosecond laser small incision lenticule extraction (SMILE) surgery. Methods. A retrospective, cross-sectional study. SimK, TNP, and TCRP from a Scheimpflug analyzer were obtained f...
متن کاملCalculations of actual corneal astigmatism using total corneal refractive power before and after myopic keratorefractive surgery
PURPOSE To calculate actual corneal astigmatism using the total corneal refractive astigmatism for the 4-mm apex zone of the Pentacam (TCRP4astig) and keratometric astigmatism (Kastig) before and after photorefractive keratectomy or laser in situ keratomileusis. METHODS Uncomplicated 56 eyes after more than 6 months from the surgery were recruited by chart review. Various corneal astigmatisms...
متن کاملThe Effect of Corneal Irregularity on Astigmatism Measurement by Automated versus Ray Tracing Keratometry
The aim of this study was to compare the effect of corneal irregularity on astigmatism assessment using automated keratometry (AK) (IOLMaster) versus ray tracing keratometry (Pentacam). This is an observational case series approved by the institutional review board of Dongguk University Hospital, Goyang, South Korea. A total of 207 eyes of 207 cataract patients were included. Preoperative corne...
متن کاملRefractive versus corneal changes after photorefracive keratectomy for astigmatism.
PURPOSE To define measures of assessing success and subsequent ways to improve excimer laser treatment of astigmatism. METHODS We studied 97 eyes of 79 patients, followed for 12 months, that underwent photorefractive keratectomy (PRK) for myopia and astigmatism with a VISX 20/20 excimer laser. Preoperative spherical equivalent refraction at the corneal plane was between -1.00 and -15.00 D. Me...
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PURPOSE To evaluate surgically induced astigmatism (SIA) after an intravitreal ranibizumab (IVR) injection. METHODS Fifty eight eyes of 58 patients who underwent IVR injection due to age-related macular degeneration (wet form) or macular edema were included in this study. Patients' pre- and postoperative detailed ophthalmologic examinations were done and topographic keratometric values (K1, K...
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ژورنال
عنوان ژورنال: European Journal of Ophthalmology
سال: 2018
ISSN: 1120-6721,1724-6016
DOI: 10.1177/1120672118757666