The Popularity And Application Of Optometry Equipment

Reflective instrument is an electronic objective optometry equipment, is the combination of refractive technology and electronic computer technology products. There is no need for the subjective judgment of the clinician and the subject, and the refractive parameters are evaluated objectively by the pre-set criteria. As the computer optometry simple, fast, short learning cycle, suitable for rapid access to objective diopter and as the main inspiration of the starting point or for daily eye care screening. Optometry Instruments With the application of high-tech optometry equipment, the accuracy of optometry equipment has been greatly improved, many instruments integrate corneal curvature or corneal topography function, and some manufacturers of instruments and integrated refractometer automatically online, The results directly into the integrated refractometer, easy to use; Optometry Instruments portable optometry equipment can also be used in the surgical process and screening. First, the principle of computer optometry Most of the optometry instrument design principle based on indirect eyepiece, the use of two objective lens or focusing mirror and a beam splitter, the light source directly from the pupil edge into the detection of the cursor can move along the axis of the projection system, The projection lens located in the front focal plane, the image will be at infinity, Optometry Instruments then in the eyes of the retina on the clear focus; if the eye is refractive error, detection of the cursor before and after the move, making it like on the retina, large Part of the optometry instrument is to change the light into the eyes by the degree of convergence to make the cursor clearly on the retina and automatically calculate the eye refraction.

Modern optometry instrument design usually has two main features:

1. Regulatory control For most optometry methods, regulatory control is particularly important. Almost all of the refractors require the subject to watch the test cursor or cursor image, the results stimulate the adjustment and make the results of myopia correction or hyperopia correction, Optometry Instruments although the test cursor through the optical design at infinity, because the instrument is very close to being seized Of the face, it induced the near-perceived regulation, so in the design process, the test cursor "fog visual", before the start of the test, the seizure first saw a "fog" cursor, in order to relax But can not completely remove the near-perceived regulation.

2. Detection of light for the infrared light currently used in the detection of optical instruments are used to detect the wavelength of 800 ~ 950 nm infrared light. The reasons are: ① infrared absorption by the intraocular tissue is less visible light, the reflection of the light through the fundus more. Therefore, Optometry Instruments the detection of light through the intraocular vector after the loss of light energy less, Optometry Instruments especially the measurement of refractive media opacity of the eyes is more important. ② for the eye, the detection of visual and detection of light is not visible, better overcome the measurement caused by the adjustment of the problem. Due to the different production companies, optometry instrument design and structure are also different, the inspectors in the use of optometry equipment before the need to read the instructions in detail. The common structure of the optometry instrument is: ① the cursors watched by the examiner. ② can adjust the jaw and head by, so that the patient's head during the inspection fixed. ③ joystick can be before and after, up and down, left and right movement to adjust and adjust the location of the subject's eyes. ④ monitor shows the location of the eye and the measurement results. ⑤ printing device.

Optometry instrument, also known as refractive combination mirror, as the name suggests, is to test a variety of test instruments together, is currently recognized as the main international optometry equipment. Optometry instrument can not only complete the myopia, hyperopia, astigmatism, presbyopia and binocular refractive balance and other conventional refractive quantitative examination, Optometry Instruments and can achieve multiple special visual test function. Optometry equipment from the visual inspection instrument, projector and optometry combination of three parts. Compared with the traditional manual insert optometry method, the use of optometry equipment, with convenient, fast and accurate features, can eliminate the stack of test lenses caused by the integrated lens degree error. In addition, the use of optometry equipment, to carry out a complete visual function testing and quantitative analysis, which is almost impossible to use other optometry methods can not be achieved.

At present, the domestic optometry sector is more unified optometry standards are: see clearly, see comfortable, see lasting. "See clearly, see comfortable" need optometrists to optometry patients with refractive examination (that is, narrow sense of optometry) and try to wear, Optometry Instruments and "see a lasting" you need to visualize the visual function of patients with the analysis. But most of the optical shop optometry has been stuck in the narrow sense of optometry. Optometry equipment in China's popularity and application, has a very important significance, will greatly enhance the level of scientific optometry technology, Optometry Instruments for the glasses retail store operators, the use of optometry equipment for a complete optometry inspection is also required by professional ethics The From a competitive point of view, the use of optometry optometry, is a professional level of optometry signs, optical shop to enhance their competitiveness as an effective means.