نتایج جستجو برای: emmetropia

تعداد نتایج: 336  

Journal: :The British journal of ophthalmology 1986
S M Thompson V Mohan-Roberts

Sixty-five patients underwent intracapsular cataract extraction with implantation of Binkhorst iris-clip intraocular lenses (IOLs). For 31 patients the IOL was of a standard power. Thirty-four patients had axial length measurement and keratometry preoperatively, and IOLs calculated to produce emmetropia or 1 dioptre of myopia were implanted. There was no significant difference in the range of p...

2017
Guido Maiello Lenna Walker Peter J. Bex Fuensanta A. Vera-Diaz

We evaluated the ability of emmetropic and myopic observers to detect and discriminate blur across the retina under monocular or binocular viewing conditions. We recruited 39 young (23-30 years) healthy adults (n = 19 myopes) with best-corrected visual acuity 0.0 LogMAR (20/20) or better in each eye and no binocular or accommodative dysfunction. Monocular and binocular blur discrimination thres...

Journal: :Investigative ophthalmology & visual science 1997
B C Jiang

PURPOSE To evaluate the differences in accommodative function between subjects with emmetropia and those with late-onset myopia (LOM). METHODS This study suggests a modified model of static accommodation, in which an accommodative sensory gain as a linear operator is added to simulate the sensory part of the system. Results derived from the model show that the sensory part not only affects th...

2014
Mohd Zulfaezal Che Azemin Norsyazwani Mohamad Daud Fadilah Ab Hamid Ilyanoon Zahari Abdul Halim Sapuan

OBJECTIVE The aim of this study was to compare the retinal vasculature complexity between emmetropia, and myopia in younger subjects. METHODS A total of 82 patients (24.12 ± 1.25 years) with two types of refractive conditions, myopia and emmetropia were enrolled in this study. Refraction data were converted to spherical equivalent refraction. These retinal images (right eyes) were obtained fr...

2016
Xiaohong Liu Hehua Ye Qi Zhang Xuan Cai Wenjing Yu Siyi Yu Tianyu Wang Wuyi Lu Xiang Li Peiquan Zhao

BACKGROUND Myopia subjects usually have long axial lengths and are predisposed to deep anterior chamber depths and open angles. Jiangning eye study is a randomized, population based study in Shanghai to determine whether myopia has an effect on the prevalence of occludable angles. METHODS A total of 2478 residents aged 50 years and over were randomly selected, and 2044 (82.5%) individuals of ...

2015
Sang-Yeob Kim Byeong-Yeon Moon Hyun Gug Cho

[Purpose] To investigate the changes in body balance under ametropic conditions induced by spherical lenses in an upright position. [Subjects and Methods] Twenty subjects (10 males, 10 females) of average age 23.4±2.70 years participated and they were fully corrected by subjective refraction. To induce ametropic conditions (binocular myopia and hyperopia), lenses of ±0.50 D, ±1.00 D, ±1.50 D, ±...

2006
Kerry Assil Y. Ralph Chu Frank A. Bucci David R. Hardten

• Maximizing Wavefront-Guided Laser Vision Correction Outcomes with Iris Registration Technology • Enhancing Wavefront-Optimized Results with Wavefront-Guided LASIK • Mixing and Matching Multifocal IOLs: Best of Both Worlds? • Achieving Spectacle Independence with Premium Lens Technology • Understanding Refractive Lenticular Patients • The Role of Intermediate Vision in the Aging Population • A...

2013
Reza Zarei Ramin Daneshvar Mohammad Soleimani Mohammad Razzaghi Sasan Moghimi Yadollah Eslami Ghasem Fakhraie Seyed Ali Tabatabaei

Purpose: To compare retinal nerve fiber layer (RNFL) profile in subjects with myopia and emmetropia using GDx variable corneal compensator (VCC) Methods: Besides ophthalmologic standard examination (refraction, visual acuity and slit-lamp examination, applanation tonometry, and funduscopy), perimetry and scanning laser polarimetry (SLP) were performed. 171 healthy age-matched subjects with low ...

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