News

Home > News > Content
Optometry Phoropter Protect The Human Eye From Visual Health
Sep 26, 2017

Optometry Phoropter is a medical field to protect the human eye as the main content of the medical field, is the ophthalmology and Optometry Phoropter, combined with modern medicine, physical optics, applied optics, biomedical engineering and other knowledge of a professional Strong, involving a wide range of interdisciplinary.

Optometry Phoropter is a medical field to protect the human eye as the main content of the medical field, is the ophthalmology and Optometry Phoropter, combined with modern medicine, physical optics, applied optics, biomedical engineering and other knowledge of a door Professional and extensive, involving a wide range of interdisciplinary. The physical characteristics of Optometry Phoropter are the clinical, scientific and clinical aspects of physical, pathological and optical aspects associated with human eye vision. The focus of research is mainly on visual research, such as myopia, amblyopia, low vision, glasses, contact lenses, refractive surgery and other visual correction of the basis of clinical research.

Now, a lot of medical colleges and universities set up as optics. In the first two years of school, the basic knowledge of medicine, including anatomy, physiology, histology, pathology and so on, and a certain degree of study of internal medicine, surgery, pediatrics, gynecology and so on. In the junior year, you need to learn more professional courses, such as ophthalmology, application of optical, physical optics, ophthalmic special examination, ophthalmology diagnosis, instrumentation, contact lens, optical optics, glasses, low Visual acuity, Optometry Phoropter and so on. In short, Optometry Phoropter is a discipline for the purpose of improving vision.

Optometry Phoropter glasses to correct the principle of vision is to achieve the correct vision of 1.5 as a standard or to achieve the 1.0 corrected visual acuity as standard? What is more scientific and practical? "," Myopia using the lowest negative mirror to get the best corrected visual acuity, hyperopia using the highest positive mirror to obtain the best corrected visual acuity, this statement is applicable to any correctable refractive properties (including myopia, hyperopia, Astigmatism, anisometropia, amblyopia, etc.) "," Why the distance of 0.5 meters of myopia, complete correction of the degree of near vision will often exceed -2.00DS "In the face of these repeated mention and discussion of the problem, this paper on the basis of some basic concepts of optics Some of these issues are discussed.

Vision is an important indicator of visual function. Snellen suggested that the value of 1 'as a normal vision of the unit, then recognized as normal vision of 1.0. But there are individual differences in normal vision. 1980 years in 22 provinces and cities in our students vision survey, found that many students can achieve the imagination of the decimal point of 2.0 visual acuity (24%), 3.0 or more is not uncommon. Individual differences in normal vision showed that even if the corrected visual acuity of 1.0 or 1.5 was achieved under good regulatory control,Optometry Phoropter it was not possible to determine that the ocular refraction should be in a positive state or that the eye was not impaired. Two examples can illustrate the problem.

The refraction obtained from the far point refers to the refractive of the eye, and the data obtained by the refractive examination are eyepiece refractive. Table 1 also shows that the frame glasses are changed with the distance from the vertex to the primary point of the lens. It can be seen that the actual customer wear glasses refraction does not mean the far point of the reciprocal eye refraction.

The closer the detection distance, the smaller the pupil, the greater the depth of focus. Assuming someone, looking at the distance of 0.5m from the pupil when the pupil to produce 1.00D depth, watching 5m distance from the standard only 0.50D depth. Far point of 0.5m eye refraction theory for the -2.00DS, but taking into account the role of 1.00D depth of focus, then the eye's actual eye refractive should be -2.50DS. Converted to 12mm lens on the glasses from the refractive point was -2.58DS, also consider the 5m distance from the visual standard is also subject to 0.50D depth, 0.20D regulation of the role, then the MPMVA measured glasses refractive should be -2.13DS.





Copyright © Hangzhou Mocular Medical Technology Inc. All Rights Reserved.Tel: +86-571-81875029