AMETROPIA: ITS PREVALENCE
نویسندگان
چکیده
منابع مشابه
Problems in comparisons of data for the prevalence of myopia and the frequency distribution of ametropia.
PURPOSE There is currently great interest in comparing data for the prevalence of myopia in different parts of the world, particularly in view of the suggestion that, in recent decades, marked increases have occurred in prevalence among children and young adults in some areas. This work investigates the factors that affect the comparison and interpretation of sets of myopia prevalence data for ...
متن کاملThe binocular accommodative response in uncorrected ametropia.
PURPOSE To measure the changes in astigmatism and in the degree of anisometropia when ametropes respond to accommodative stimulation. METHODS The accommodative responses of ametropes were binocularly measured with an improved photorefractometer (PR-1100), which objectively measured binocular refraction in all meridians simultaneously, when a visual fixation target was shown in natural space a...
متن کاملRetinal image in axial and refractive ametropia.
THERE are some features relative to the size of the retinal images in these two conditions which are of general interest, though they are rarely discussed. Axial Ametropia.-The " basic " (blurred) retinal image is smallest in hyperopia, intermediate in emmetropia, and largest in myopia. The size of a blurred retinal image is best taken from the points in the diffusion circles at the extremities...
متن کاملLenticular accommodation in relation to ametropia: the chick model.
Our goal was to determine whether experimentally induced ametropias have an effect on lenticular accommodation and spherical aberration. Form-deprivation myopia and hyperopia were induced in one eye of hatchling chicks by application of a translucent goggle and +15 D lens, respectively. After 7 days, eyes were enucleated and lenses were optically scanned prior to accommodation, during accommoda...
متن کاملIris-Fixated Intraocular Lenses for Ametropia and Aphakia
Implantation of intraocular lens with Iris-fixation is a safe, efficient and predictable surgical procedure, which empowers the refractive surgeon with singular capabilities. Among their advantages are the reversibility, preservation of accommodation and a broad spectrum of ametropic correction. This lens also appears to be a valid option, with a favorable complication rate, for the treatment o...
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ژورنال
عنوان ژورنال: British Journal of Ophthalmology
سال: 1924
ISSN: 0007-1161
DOI: 10.1136/bjo.8.2.91