نتایج جستجو برای: intraocular lens power calculation formula
تعداد نتایج: 724342 فیلتر نتایج به سال:
Purpose To determine the unknown preoperative K readings (Kpre) to be used in history-based methods, for intraocular lens (IOL) power calculation in patients who have undergone myopic photorefractive keratectomy (PRK). Methods A regression formula generated from the left eyes of 174 patients who had undergone PRK for myopia or for myopic astigmatism was compared with other methods in 168 righ...
前眼部光干渉断層計（OCT）のトーリックカリキュレーターにはKeratometry（K）を用いたBarrett Toric式（BT式）と、Fourier Real power Cylinder（FRCyl）を用いたCASIA Toric式（CT式）があり、両式による術後乱視誤差を検討した。
PURPOSE This study tests the hypothesis that the keratometric value derived from Orbscan II mean power maps, when used in an intraocular lens (IOL) calculation formula, at a specific measurement zone, will accurately determine the power of an IOL for planned cataract surgery in patients who have undergone prior myopic laser-assisted in situ keratomileusis (LASIK). METHODS This is a two-part s...
Purpose To compare two calculators for toric intraocular lens (IOL) calculation and to evaluate the prediction of refractive outcome. Methods Sixty-four eyes of forty-five patients underwent cataract surgery followed by implantation of a toric intraocular lens (Zeiss Torbi 709 M) calculated by a standard industry calculator using front keratometry values. Prediction error, median absolute err...
PURPOSE To use optical coherence tomography (OCT) to measure corneal power and improve the selection of intraocular lens (IOL) power in cataract surgeries after laser vision correction. METHODS Patients with previous myopic laser vision corrections were enrolled in this prospective study from two eye centers. Corneal thickness and power were measured by Fourier-domain OCT. Axial length, anter...
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