The computer refractometer is developed by integrating modern optics and computer technology. It is an automated instrument that measures the refractive error of the eye according to the focusing principle of the eyeball and the visual characteristics of the human eye, thereby objectively measuring the refractive state of the eye.
How does a computer refractometer check the refractive state of our eyes?
The principle of computer optometry: the principle of Scheiner, the principle of focimeter, the principle of retinoscopy, but these three principles are all through the movable lens in the computer, so that a clear image is obtained on the retina of the inspected eye, and then through different The method measures the degree or displacement of the required lens, and obtains the diopter of the eye to be inspected.
The computer refractometer is an objective optometry instrument that emits a beam of infrared light of a specific wavelength, passes through the cornea, lens, aqueous humor, retina and other eye organs, and finally projects to the retina, and then reflects back into the optical system of the instrument. , CCD receives the light signal and converts it into an electrical signal. Use the integral formula to calculate the useful signal, and decompose the data of spherical mirror, cylinder mirror, axis position and so on.
Analyze the types of myopia through computer refractometer data, mainly around axial myopia and curvature myopia.