Myopia, the Use of Concave Glasses for near Work in Low Degrees of
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چکیده
منابع مشابه
بررسی عوامل مرتبط با پیشرفت نزدیک‌بینی در مراجعه‌کنندگان نزدیک‌بین به مرکز چشم‌پزشکی بیمارستان ولیعصر(عج) بیرجند در سال 1391
Background and Aim: Myopia is one of the most prevalent complaints of patients referring to ophthalmologists. Regarding the progressive nature of this complication, it was decided to assess the patients referring to the eye clinic of Valieasr hospital in Birjand (in 2012). Materials and Methods: In this cross- sectional survey,with simple non-probable sampling, a total of 403 myopic patients...
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Basic control theory equations are developed showing conventional exponential system response of refraction vs. time R(t) with a characteristic system time constant, in response to a step change of near work environmental conditions. Details from preliminary experimental design using reading glasses at the U.S. Naval Academy at Annapolis are discussed. The conclusion is that (+) Add lenses, use...
متن کاملTheory and Experiments. (+) Add Reading Glasses to Prevent Myopia
Basic control theory equations are developed showing conventional exponential system response of refraction vs. time R (t) with a characteristic system time constant, in response to a step change of near work environmental conditions. Details from preliminary experimental design using reading glasses at the U.S. Naval Academy at Annapolis are discussed. The conclusion is that (+) add lenses, us...
متن کاملAttitudes of students, parents, and teachers toward glasses use in rural China.
OBJECTIVE To use focus groups to understand barriers to glasses use among children in rural China. METHODS Separate focus groups were conducted between December 17, 2007, and August 5, 2008, for the following 3 groups at each of 3 schools in rural China: children aged 14 to 18 years with myopia of less than -0.5 diopters in both eyes, those children's parents, and those children's teachers. P...
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In this paper, a one-dimensional photonic crystal filter based on the [SiO2/ZrO2] bilayer have been designed for application in safety glasses for working in 350-nm wavelength. High power lasers with low wavelength e.g. 350-nm have very high power which can cause serious damage to the operator’s eyes. In this paper using the transfer matrix method and theoretical calculation in MATLAB software ...
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عنوان ژورنال:
دوره 34 شماره
صفحات -
تاریخ انتشار 2017