نتایج جستجو برای: keratorefractive surgery
تعداد نتایج: 341593 فیلتر نتایج به سال:
Background : Posterior corneal elevation changes are keys to early diagnosis of corneal ectasia after keratorefractive surgery, so it is important to use an accurate method for measuring posterior corneal elevation. The purpose of this study is investigating posterior corneal elevation changes with Pentacam(HR) on patients underwent photorefractive keratectomy. Methods: In this clinical tri...
JANUARY 2006 I CATARACT & REFRACTIVE SURGERY TODAY I 19 Contrast acuity testing continues to be paramount now that presbyopic correction is part of our clinical armamentarium. Key is how much the correction of presbyopia degrades distance visual function. Until now, this question has not been answered adequately. In general, I am astounded that we embarked on keratorefractive surgery 25 years a...
A hydrogel intracorneal lens for refractive keratoplasty must have predictable and stable optics when implanted in the corneal stroma. A series of experiments was performed to evaluate the hydrogel hydration stability when in the corneal stromal environment. Hydrogel ICLs of 54%, 63%, 66% and 71% water content showed no loss of hydration (by weight) after one week in the rabbit corneal stroma. ...
purpose: to compare orbscan ii and ultrasonic pachymetry for measurement of central corneal thick-ness (cct) in eyes scheduled for keratorefractive surgery. methods: cct was measured using orbscan ii and then by ultrasonic pachymetry in 100 eyes of 100 patients who were scheduled for excimer laser refractive surgery. paired t-test was used for comparing the results. results: using an acoustic f...
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