نتایج جستجو برای: ocular axial length

تعداد نتایج: 404364  

Journal: :Investigative ophthalmology & visual science 2010
Scott A Read Michael J Collins Beata P Sander

PURPOSE To investigate the short-term influence of imposed monocular defocus on human optical axial length (the distance from anterior cornea to retinal pigment epithelium) and ocular biometrics. METHODS Twenty-eight young adult subjects (14 myopes, 14 emmetropes) had eye biometrics measured before and 30 and 60 minutes after exposure to monocular (right eye) defocus. Four different monocular...

M Mokhtari Dizji M.R Mansori M.R Zarin SH SHahbazi

Background & Aims: Age-related macular degeneration (ARMD) is one of the common retina disorders that can lead to loss of vision by increase in age. In this study, the efficacy of a non-invasive ultrasound technique for the evaluation of alastic properties of eye in the diagnosis of ARMD has been evaluated. Methods: For estimation of the elastic modulus of eye, spatial loading system designed a...

2017
Yin Guo Li Juan Liu Ping Tang Yan Yun Lv Yi Feng Liang Xu Jost B Jonas

PURPOSE To investigate factors associated with ocular axial elongation and myopia progression during a 4-year follow-up in primary school children in Beijing. METHODS This school-based study included 382 grade-1 children at baseline in 2011 (age:6.3±0.4 years) with 305 (79.8%) returning for the follow-up examination in 2015. At baseline and in yearly follow-up examinations, the children under...

Journal: :The British journal of ophthalmology 1998
D F Garway-Heath A R Rudnicka T Lowe P J Foster F W Fitzke R A Hitchings

AIMS To compare methods available to correct the magnification of images that result from the optics of the eye and identify errors, and source of error, of the methods. METHODS 11 methods were applied to ocular biometry data from three independent cohorts. Each method was compared with the method of Bennett, which uses most biometric data. The difference between each method and Bennett's is ...

Journal: :The British journal of ophthalmology 2003
R George P G Paul M Baskaran S Ve Ramesh P Raju H Arvind C McCarty L Vijaya

AIM To compare ocular biometric values in a population based sample of eyes with occludable angles, angle closure glaucoma, and normal subjects. METHOD 2850 subjects from a population based glaucoma prevalence study underwent complete ocular examination including indentation gonioscopy. Ocular biometry was performed in all subjects classified to have occludable angles (n = 143); angle closure...

Journal: :Archivos de la Sociedad Espanola de Oftalmologia 2008
E Yebra-Pimentel J M González-Méijome C García-Resúa M J Giráldez-Fernández

PURPOSE To report the relationship between different optical ocular components and the influence of axial length on emmetropization. METHODS 109 young university students, divided into five groups, were enrolled in this study: emmetropes, hyperopes, low myopes, moderate myopes and high myopes. Intraocular parameters and topographic corneal analyses were performed by ultrasonography and videok...

2015
Hassan Hashemi Mehdi Khabazkhoob Mohammad Hassan Emamian Mohammad Shariati Mohammad Miraftab Abbasali Yekta Hadi Ostadimoghaddam Akbar Fotouhi

PURPOSE To investigate the association between ocular biometrics such as axial length (AL), anterior chamber depth (ACD), lens thickness (LT), vitreous chamber depth (VCD) and corneal power (CP) with different refractive errors. METHODS In a cross-sectional study on the 40 to 64-year-old population of Shahroud, random cluster sampling was performed. Ocular biometrics were measured using the A...

Journal: :Investigative ophthalmology & visual science 2010
Jos J Rozema Thomas J T P Van den Berg Marie-José Tassignon

PURPOSE To determine the dependency of straylight on ocular biometry. METHODS This prospective study included 518 eyes of 277 volunteers of diverse ethnic backgrounds with healthy eyes of various iris colors. The eyes had retinal straylight tested using a commercial psychophysical device. Ocular axial length and refraction were also measured with an ocular biometer and an autorefractometer, r...

2015
Jingyi Wang Ying Li Yumei Jin Xue Yang Chan Zhao Qin Long

Purpose. To evaluate the corneal biomechanical parameters in myopic and emmetropic eyes using Corneal Visualization Scheimpflug Technology (CorVis ST). Methods. 103 myopic and emmetropic eyes of 103 patients were examined. Corneal biomechanical parameters, axial length, and mean keratometry were measured using CorVis ST, IOL Master, and topography, respectively. Corneal biomechanical properties...

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