What Is a Phoroptor?
An optometry instrument checks the light gathered after it enters the eyeball. It uses the state of the emmetropic eye as a standard to measure the degree of divergence between the examined eye and the emmetropic eye.
- Chinese name
- Optometry
- Foreign name
- optometry uni
- Definition
- Check the convergence of light after entering the eyeball
- Standard
- Face up
- Use
- Diagnostic Optometry
- An optometry instrument checks the light gathered after it enters the eyeball. It uses the state of the emmetropic eye as a standard to measure the degree of divergence between the examined eye and the emmetropic eye.
- Optometry is the main method to clarify refractive error, which occupies a considerable workload in clinical work. In the past, traditional retinal examination methods were time-consuming and laborious, and extremely difficult to master. After the 1970s, a new type of automatic optometry came into being, using infrared, electronic, computing and other technical means to check the concentration of light after entering the eyeball.
- Optometry refraction can be used as a diagnostic optometry for soft contact lens fitting. It does not require dilation and can quickly measure the refractive power. The refraction results of the refractor are automatically printed without conversion. Generally, a patient can be measured within a few seconds to a few minutes, and the refractive error can be quickly measured, providing more accurate refractive power and interpupillary distance for lens correction.
- The accuracy of the refractor is affected by many factors, such as the poor fit of the patient's head and eyes, moving around, the focus of the eye on the refractor is not concentrated enough, so that the relaxation adjustment is not enough, which will definitely affect the accuracy of the diopter test result, Repeated inspections vary widely in degree. For children and patients with refractive interstitial turbidity, the error of the computer optometry test is large, and even the refractive power cannot be checked. Therefore, it is not appropriate to use the computer-based refractive power as the sole basis for opticianship. Computer optometry cannot replace the optometrist's optometry and lens correction techniques, and only provides a useful reference for manual optometry.
- Optometry can quickly measure the general situation of refractive error, which can provide a useful reference for understanding the consumer's refractive level and a large number of outpatient optometry.
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