purpose: to compare thickness of central cornea measured using pentacam, orbscan ii, and ultrasound pachymeter methods: patients with no history of corneal diseases or systemic diseases affecting eyes, who did not wear contact lens or use eye medications, and who with no previous history of corneal surgery were selected for this study. central corneal thickness (cct) was measured by three metho...

baradaran rafii ar, md; motevasseli t, md*; yazdizadeh f, md; ansari sh, md; karimian f, md; sadoughi mm, md; kiani h ocular tissue engineering research center, shahid beheshti university of medical sciences, tehran, iran * corresponding author: [email protected] purpose: to compare anterior segment indices measured by two scheimpflug camera; galilei and pentacam. methods: in this observa...

Rotating Scheimpflug imaging technology is used by instruments such as the Pentacam (Oculus) to measure the anterior and posterior corneal surfaces, as well as other anterior segment structures. Initially, Scheimpflug photography was used to obtain images of lens opacities for objective evaluation, but Pentacam-Scheimpflug camera is much wider in its clinical applications as a diagnostic tool f...

purpose: to compare orbscan ii and pentacam keratometry readings in terms of their agreement with a manual javal type keratometer methods: in this retrospective study, records of patients who had refractive surgery were reviewed. we extracted data of 765 eyes which had keratometry with the javal keratometer of these, 577 had orbscan ii and 200 eyes had pentacam acquisitions. minimum (min-k) and...

Purpose: This study examines agreement between the devices Anterion® and Pentacam HR® used for corneal pupil measurements in healthy eyes. Methods: The parameters compared two were: anterior Km (D), K2 K1 axis (°), astigmatism K max posterior CCT (μm), thinnest point thickness X-coordinate (mm), Y-coordinate diameter center-corneal vertex distance (mm) (angle kappa), centroid angle (mm). Result...

PURPOSE To evaluate the accuracy of central corneal power measurements by Scheimpflug imaging (Pentacam) for eyes that had corneal refractive surgery. METHODS This study comprised two groups: a pilot group of 100 eyes with prior hyperopic or myopic LASIK that did not have cataract surgery, and a test group of 41 eyes with prior radial keratotomy (RK) and cataract surgery. In the pilot group, ...

قدرت تفکیک دستگاه طیف‌نگار جرمی به صورت مستقیم شدت یون خروجی و انرژی آن بستگی دارد. مقدار تولید شده جریان باریکه الکترونی وابسته است. از جمله وظایف مدار کنترل چشمه برخورد تنظیم برای رسیدن بهینه می‌باشد. در ساخت پارامترهایی نظیر تثبیت آن، دقیق پتانسل الکتریکی لنز الکترودهای یونی بسیار حایز اهمیت این مقاله با قابلیت انتشار الکترون، پتانسیل نقاط طراحی ساخته شد. کنترلر بر روی طیف نگار 44Varian MAT ...

Primary angle-closure glaucoma (PACG) is a major form of glaucoma in Asia. It is a leading cause of blindness worldwide. Laser peripheral iridotomy (LPI) is the standard firstline intervention in both acute and chronic forms. It is successful in preventing recurrence of acute attacks and virtually eliminates the risk of an acute attack in the fellow eye. Peripheral iridotomy eliminates pupillar...