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Reprinted from 270609521 at 20:05 on September 1, 2010 Reading (loading. ..) Comments (0) Category: Personal Diary
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we know to look too far below the progressive view is near the top (look near the top of a very special is to look too far below, is said to look at the top of the aircraft instruments aircraft passing below the staff to see the land,
nike hyperdunk shoes, but presbyopia can drive the aircraft is questionable. is not discussed here ),
lebron iii, then it is important that under the eyes can spin through a smaller increase to reach the next zone. By the graph we can easily see that the outer surface of the eye need gradual swing angle is relatively small, which means the same under the additional light,
nike kobe v, with a smaller frame height can be easily added to the next zone. The inner surface of the evolutionary need more backspin, which means the need for greater vertical height of the frame.
we understand why this progressive design of the outer surface brightness, because only the design of the outer surface of the eye before the next rotation angle of the smallest light can easily reach the near zone, we can achieve a smaller Dispensing height. Research has shown that the higher degree of human presbyopia (ie, the greater ADD), under the rotation capacity of the poorer eye, this time to select the outer surface of the more progressive the. Since the photometric design
that only the outer surface of the ideal, why do the inner surface progressive it? Because the eye is not the only swing angle as a physical problem, there are even more important factor, that is vision. We look at the following figure in the field of vision on both internal and external design differences:
The figure shows, there is no doubt progressive inner surface of a larger viewing area,
kobe v shoes, a more broad perspective. We know that is a progressive piece of peripheral astigmatism area, if the design, including surface brightness, wearing glasses are not easy to feel the interference of the surrounding area astigmatism, looking away when you can just as easily as a single optical chip to adapt. This suggested to us that in the gradual assembly of films, both the outer surface of the inner surface progressive or gradual reduction of as much as possible away from the eye lens, wide field of vision will improve, reducing the customer on the peripheral aberrations discomfort.
That said for a long time may make people even more confused: I recommend to their customers or the inner surface of the outer surface of gradual progressive? Here to talk about my personal point of view.
course depends on the lateral view of the size of the luminosity of the design, but most of all depends on the added light. Imagine if the rate of light is zero (that is, single-ray film), that regardless of the brightness on the outside or inside the design, vision is not what it is. Will mean a small increase of light presbyopia is not serious, mean look far to see the past than the large demand, which means very strong spin under the eye, so I chose progressive inner surface is ideal.
Add Everbright (ADD> 1.75), and progressive pieces worn by the people, choose the outer surface of the inner surface progressive than the strong, as worn around the astigmatism and progressive people have a certain tolerance while watching the dependence on glasses and almost the highest capacity of the eye and relatively less backspin, then select the outer surface of the eye gradually to more easily can reach the near by areas, more conducive to see near.
big plus for those who wear the beginning of the light is concerned, is the worst glasses, and also the distribution area of most complaints. If you select the outer surface of gradual, the next spin is no problem, but the vision problems; if the election within the surface, but the vision is not a problem of a long channel to see the past; it seems nothing is the ideal choice. Weigh both internal and external, must select the preferred design of the rigid lenses,
nike basketball shoes, even though peripheral astigmatism steeper,
nba shoes, but the maximum relative light district, also easy to overlook areas of astigmatism. increase of more than 2.50D
under the initial wear are concerned, will need to double-sided composite design with the lens, the longitudinal design of the outer surface brightness, horizontal design of the inner surface brightness. Otherwise, do not with gradual, and the customer is living death, the success rate of optical shops for less than 30% of the trouble, it is better to change with two-light good.
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