نتایج جستجو برای: axial myopia

تعداد نتایج: 55497  

2016
Junbo Rong Yuan Wang Lijuan Wei Dongmei Zhu Jinsong Zhang

The aims of this study was to observe the variation in subfoveal choroidal thickness (SFCT) in patients with highly myopic macular complicated by choroidal neovascularization (CNV) and to compare choroidal thickness in these eyes with highly myopic eyes without CNV, matched with the others group by ages, genders, eye axial length and diopter. 72 cases with 72 eyes, confirmed with high myopia in...

Journal: :Vision Research 2007
David Troilo Nicole Quinn Kayla Baker

Accommodation may indirectly influence visually guided eye growth by affecting the retinal defocus signal used to guide growth. Specifically, increased lags of accommodation associated with low stimulus-response (S-R) function slopes will impose increased hyperopic blur on the retina and may induce axial elongation and myopia. The purpose of this study was (1) to measure accommodation in awake,...

2013
Malgorzata Mrugacz

Myopia, also known as nearsightedness, is the most common eye disorder worldwide. In myopic peoples, the image of distant objects falls in front of the retina, either as the eye is too long (axial myopia), the cornea is too convex or the index of refraction of the lens is too high (refractive myopia). The light enteringthe eye is not focused correctly and distant ob‐ jects look blurred [1]. The...

2016
Puspendu Das Ruma Das Praveer Kumar Shrivastava Abhisek Mondal

Introduction: Myopia or short sightedness, is that form of refractive error wherein parallel rays of light come to a focus in front of the sentient layer of the retina when the eye is at rest; the eye is thus relatively too large, and the condition is the opposite to that of hypermetropia. Aims and objectives of the research were to find out whether there is a correlation between axial length, ...

2003
A J Lee S-M Saw G Gazzard A Cheng D T H Tan

Aim: To assess whether intraocular pressure (IOP) is associated with refractive error or axial length in children. Methods: Of subjects from the Singapore Cohort Study of the Risk Factors for Myopia (SCORM), 636 Chinese children aged 9–11 years from two elementary schools underwent non-contact tonometry, cycloplegic autorefraction, and Ascan biometry during 2001. For analyses, refractive error ...

Journal: :Investigative ophthalmology & visual science 2011
Donald O Mutti Loraine T Sinnott G Lynn Mitchell Lisa A Jones-Jordan Melvin L Moeschberger Susan A Cotter Robert N Kleinstein Ruth E Manny J Daniel Twelker Karla Zadnik

PURPOSE To investigate whether relative peripheral hyperopia is a risk factor for either the onset of myopia in children or the rate of myopic progression. METHODS The risk of myopia onset was assessed in 2043 nonmyopic third-grade children (mean age ± SD = 8.8 ± 0.52 years) participating in the Collaborative Longitudinal Evaluation of Ethnicity and Refractive Error (CLEERE) Study between 199...

Journal: :Investigative ophthalmology & visual science 2011
Padmaja Sankaridurg Brien Holden Earl Smith Thomas Naduvilath Xiang Chen Percy Lazon de la Jara Aldo Martinez Judy Kwan Arthur Ho Kevin Frick Jian Ge

PURPOSE To determine whether a novel optical treatment using contact lenses to reduce relative peripheral hyperopia can slow the rate of progress of myopia. METHODS Chinese children, aged 7 to 14 years, with baseline myopia from sphere -0.75 to -3.50 D and cylinder ≤1.00 D, were fitted with novel contact lenses (n = 45) and followed up for 12 months, and their progress was compared with that ...

Journal: :American journal of ophthalmology 2013
Bruce H Koffler James J Sears

PURPOSE To compare the safety and efficacy of orthokeratology as a nonsurgical treatment for myopia in children with alternate methods, such as soft contact lenses, rigid gas permeable lenses, and spectacles, throughout multiple studies. DESIGN Perspective with literature review. METHODS Analysis of recent studies to determine the safety and effectiveness of orthokeratology versus soft cont...

Journal: :Investigative ophthalmology & visual science 2009
Yi-Shan Qian Ren-Yuan Chu Ji C He Xing-Huai Sun Xing-Tao Zhou Nai-Qing Zhao Dan-Ning Hu Matthew R Hoffman Jin-Hui Dai Xiao-Mei Qu Kristina E Yi-Hwa Pao

PURPOSE To investigate the influence of color vision on myopia development by testing refraction error and axial length of the eye for high school students with and without color vision deficiency (CVD). METHODS A school-based cross-sectional, cluster sample study was conducted to test the color vision and refractive error of 16,539 high school students. Students were screened for CVD using a...

Journal: :Optometry and vision science : official publication of the American Academy of Optometry 2013
Jeffrey J Walline Katie L Greiner M Elizabeth McVey Lisa A Jones-Jordan

PURPOSE Previous studies on soft multifocal contact lens myopia control published in the peer-reviewed literature reported findings of noncommercial contact lenses worn for 1 year or less. This study sought to determine the progression of myopia and axial elongation of children fitted with commercially available distance center soft multifocal contact lenses for 2 years. METHODS Eight- to ele...

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