نتایج جستجو برای: pentacam
تعداد نتایج: 460 فیلتر نتایج به سال:
مقدمه: این مطالعه جهت مقایسه ی مقادیر اندازه گیری شده ی ضخامت مرکز قرنیه با دستگاه های orbscan ii، ultrasound و pentacam در بیماران کاندیدای عمل photorefractive keratectomy (prk) انجام گرفت. روش ها: این مطالعه، یک مطالعه ی توصیفی- تحلیلی بود که در سال 1392 به مدت یک سال در بیمارستان فیض شهر اصفهان انجام شد. نمونه ی مورد بررسی، شامل 84 چشم از 84 بیمار که کاندیدای عمل prk بودند و سابقه ی عمل جراح...
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...
Background: Chronic angle-closure glaucoma (CACG) is a visually destructive disease. Effective management of CACG requires identifying eyes with narrow angle.
 Objective: To compare pentacam gonioscopy in detecting angles CACG.
 Method: We enrolled 101 glaucoma. Gonioscopy was performed on all eyes. Using Shaffer’s grading, subjects were classified into angle closure and open angle. A...
Background; Central corneal thickness (CCT) measurements are important for determining intraocular pressure (IOP), examining endothelium activity, and assessing patients before after refractive surgery . Contact non-contact techniques can be used to assess CCT, Aim objectives: in individuals with healthy corneas, CCT values taken three distinct devices: noncontact specular microscope, anterior ...
Purpose: To assess the repeatability of central corneal thickness measurement at the geometrical center (Central Corneal Thickness CCT) given by the Pentacam High Resolution (HR) Comprehensive Eye Scanner (Oculus, Wetzlar, Germany) over time. Methods: Prospective, single center, observational study. Two separate CCT measurements were taken by the Pentacam corneal tomography exam (CTm) 3 to 12 m...
AIM To evaluate the changes in the anterior segment parameters of the subjects with primary angle closure suspect (PACS) before and after laser iridotomy (LI) using the Pentacam and gonioscopy. METHODS Forty-eight eyes of 48 PACS were included. Anterior chamber angle (ACA), central anterior chamber depth (ACD), anterior chamber volume (ACV) and central corneal thickness (CCT) were recorded fr...
PURPOSE This study determined to assess the degree of agreement between anterior chamber depth (ACD) measurements obtained using three different devices and to analyse the relationship between ACD and spherical equivalent (SE) refraction. METHODS In this cross-sectional study, 42 eyes of 42 patients with a mean SE of - 4.69 +/- 4.61 D (range 0.00 D to - 14.88 D) were analysed. Measurements of...
BACKGROUND To evaluate and compare the astigmatism prediction errors taken with the Pentacam measurements, Baylor nomogram, and Barrett formula for toric intraocular lens (IOL) implantation. METHODS Phacoemulsification with toric Precizon IOL implantation was performed in 41 eyes with corneal astigmatism (range, 1 to 5 diopters (D)) determined by IOLMaster and SimK on Pentacam. Preoperative c...
PURPOSE Many systems try to replace Placido disc-based topographers, such as those based in Scheimpflug principles. The purpose of this study is to check if they are interchangeable. METHODS Quantitative analysis evaluated data obtained from EyeSys and Pentacam, i.e. simulated keratometric values, in addition to flattest and steepest keratometric values. Sixty-three maps from each device (Eye...
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