نتایج جستجو برای: aberrometer
تعداد نتایج: 155 فیلتر نتایج به سال:
BACKGROUND The purpose of this study was to compare corneal power and horizontal corneal diameter (white-to-white [WTW] distance) readings obtained by the Orbscan II topographer and the iTrace aberrometer. METHODS Keratometry readings in the flat (Kf) and steep (Ks) meridians and WTW distance were measured with the Orbscan II and iTrace systems in 100 myopic patients. Statistical evaluation w...
Sir, Recently, a new aberrometer, the iDesign advanced Wavescan studio) has been launched for commercial use. This device is considered as a new, upgraded and more sensitive version of the Wavescan aberrometer (Abbott It has five times greater resolution, encompassing over 1,250 data points through a 7.0‑mm pupil as compared to 240 points for the Wavescan. [1] However, it remains to be seen if ...
Objective accommodation measurements in prepresbyopic eyes using an autorefractor and an aberrometer
We modified a commercial Hartmann-Shack aberrometer and used it to measure ocular aberrations twice at each of 38 points across the central 42 degrees horizontal x 32 degrees vertical visual fields of five young emmetropic subjects. Some Zernike aberration coefficients show coefficient field distributions that were similar to the field dependence predicted by Seidel theory (astigmatism, oblique...
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