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三棱镜制作移位(The prism makes the shift)
三棱镜制作移位(The prism makes the shift)
Optimization design of prism prescription
Source: money group
Date: 2011-06-20 browsing frequency: 294
Wen: pan xuelong
For binocular visual function, at present our country most hospital eye not to carry out the relevant testing and evaluation, optical shop workers, more focus on refractive detection, stay on the vision correction and improve.
Binocular function contains two aspects, one is the function of keeping both the eye adjustment and the eye movement together, the other is the function of the central eye fusion function in the brain. In particular, the former cooperation is not necessarily very precise and harmonious, while the latter works hard to overcome the poor conditions of adjustment and collection, (but tries to overcome the existence of visual fatigue). There may not be symptoms or mild discomfort in overcoming limits. With the increase of the function of collaboration, the symptoms of visual fatigue gradually protruding. Such as blurred vision, inability to read and write, and frequent re-vision, computer operation cannot be sustained. Headache, eye pain, bloating, inability to concentrate, the serious person has insomnia, lethargy, upset expression. Binocular vision is not healthy, easy for people to ignore. The popularization of optical and visual projector is a great convenience for binocular vision function detection, and comprehensive optometry is used to assist lens and attach
The lens is used in conjunction with the projector, which can complete the whole inspection project of binocular vision. For prism design:
With the high diopter, the preferred method is to use the mobile light heart, and the prismatic effect formula P delta = F * D, and the D value is calculated. If the diameter of the lens is not enough, the eccentric lens should be customized. The optical center has been designed to indicate that the distance between the pupil and the center of the light should be indicated. If in the prism bar to f
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