Vision care device
A vision and light source technology, applied in medical science, diagnostic signal processing, eye exercisers, etc., can solve problems such as treating the symptoms but not the root cause, incomplete vision training, unsightly eyes, etc., to improve refractive power and solve vision problems. Correction of problems, restoration or effects of refractive power
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[0044] First, the principle of the present invention is explained as follows:
[0045] Parallel light rays are focused into a point after passing through a certain lens, and the distance between this point and the lens center is the focal length.
[0046] Diopter or power, which is expressed in English as "Dioptre", is a unit for measuring the refractive power of a lens. The length of the focal length f indicates the refractive power. The shorter the focal length, the greater the refractive power. The reason for myopia is that the refractive power of the eye is too large, and the refractive power of hyperopic people is too weak. The reciprocal of the focal length is called the lens power, or diopter, and is used Means: φ = 1 f
[0047] The power of a convex lens (such as a hyperopic lens) is positive (+), and the power of a concave lens (such as a myopic lens) is negative (-).
[0048] The unit of diopter is abbreviated as D, and the unit of the International System of...
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