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a learning goal
grasp incremental lens does not rule out the methods and the main reason.
two steps
1. request does not wear those who described how, to encourage them to elaborate.
2. to understand the past history of wear and analysis of the original glasses and the difference between the new glasses.
3. re-marked in the progressive lenses on all the tags: first fluorescent lamp lenses at a 2-point hidden in small imprinting, and then the glasses lens on the surface of the outer lens measuring card (leg-up), 2 hidden in small imprinting at the location on a small map marking t Read more »

one. refractive eye of the system by
aqueous corneal refractive lens vitreous of the four components of the media.
1. cornea: Drive level: 11 ~ 11.5mm in diameter down: 10 ~ 10.5mm
peripheral corneal thickness for: 1.1mm a little thin for the Central (CCT): 0.5 ~ 0.7mm
before the radius of curvature: 7.7mm after the radius of curvature: 6.8mm
refraction Rate: 1.376 transmission rate: 97%
refractive power is about: 43.05D eyes account for the total refractive power of 73%.
2. aqueous: deep in the central chamber of about 2mm. The water content of 0.1ml, after the aqueous cont Read more »

nanotechnology, a term imported from Greece, has been used in engineering, electronics, physics, materials science and manufacturing and other fields. The initial nanotechnology is a British professor AlbertFranks the definition of (nanotechnology): in the 0.1 range to 100 nanometer scale play a key role in the field of science and technology. Brbrbr in many areas of nanotechnology are playing an important role in the drug delivery also Is no exception. Every year, many of the birth of a new transmission technology, though, nanotechnology is still showing a lot of other technologies can n Read more »

Japan Institute of Physics and Chemistry in Britain biotechnology magazine online reported that the agencies and Kyoto University researchers developed the use of human embryonic stem cells cultured retinal cells and efficient new technologies, which help to promote the outcome of the Research on treatment of retinal diseases.
play the role of photoreceptor cells of the retina or retinal cells to provide nutrients to the retinal pigment epithelial cells to change characters, the majority of retinal diseases. Diseases such as retinal transplantation of fetal retinal cells discarded alth Read more »

pressure-paste type of pressure put mirror ball and put pressure prism. Spherical stickers pressure is the use of aspheric optical design principle, pose a series of concentric circles, greatly reduced the thickness of the mirror ball, no matter how much refractive power, the thickness of the lens are only 1mm. Prism is the use of pressure put FRESNEL. The principle of a series of narrow prism of the traditional prism closely arranged in a flat – Zhang thin plastic board composition, similar to reduce the thickness of the lens, 40 △ prism of the pressure patch, the thickness of only lmm. 3M Read more »