Aspheric poly or high index? - index of /privates/
I keep getting different information / views of each site optical shop. I want the best for my lenses, 8 1 / 2 year old daughter, and I mean aesthetically, but also for his vision. She has a pair of glasses since the age of 5 months. We have increased the last 2 or 3? Years, but now it's time for a new pair, so I'm still undecided. Store personal small loans at high interest rates is the right way, Wal-Mart, for example, says policeman is so thin, aspheric, and will not put a child under 18 years of high ....
I do not want to pay a ton for the high-index aspherical if Poly is so good.
Your recipe is R SPH 6.5, 1.5 cyl, axis x180. L 6.75, 1.50, X170.
Side note: I do not understand what the cylinder and shaft, or even what they mean, or if the question to decide what type of lens. Thank you!
Friday, January 29, 2010
Index Of /privates/ Aspheric Poly Or High Index?
6 comments:
The difficulty is the correction of astigmatism. The axis is the meridian that astigmatism is placed on the lens. It is part of the total power of the lens.
This was written by an ophthalmologist because of the number + Cyl. It use to be converted to the form - easy to use, it is R: + 8.00 to 1.50 x 90 ... L: + 8.25 to 1.50 x 80
With so high SPH (sphere) the number, polycarbonate, or even be considered.
POLYCARB is nearly as high of a poor quality optics sales. The truth is a 3.00 + is the limit that the police should be used. Your daughter is + 8.00
With a target of a high refractive index to be your vision stronger, and the chromatic aberration on the edges of the lens as you would cop.
HELLO - index aspherical lens may be as important as the higher powers.
Aspheric Poly is not as thin as an objective index can be high, it is not true.
Even with a high rate, it will be a wide enough target, so it is certainly not the risk of rupture, WHI am usually the only advantage of Poly.
You can use both, depending on the structure you choose, but the main thing that is showing the lenses with a choice of diving, the thinner the lens laboratory that it is incompatible with this requirement can produce in the context that you choose have.
In addition, a high optical depth of the index of various materials can be calculated through its subsidiaries, which help in the decision to ... if they `t, not good!
Hello ...
It is true that not choose sometimes venture
the best for our family
But I recommend that Aspherical ...
Besides being thin, which is more aesthetic, has no peripheral aberrations,
osea, if both a grid through the lens to see full and without error in a meridian.
What if the network with the polycarbonate or high index
The network will be distorted in the periphery of the lens is only apparent in the center of the lens.
Select aspherical, in my opinion is the best material for your daughter ... gruaduacion
This provides more security for our children, visually.
CHANCE!
Optometrist!
Hello ...
It is true that not choose sometimes venture
the best for our family
But I recommend that Aspherical ...
Besides being thin, which is more aesthetic, has no peripheral aberrations,
osea, if both a grid through the lens to see full and without error in a meridian.
What if the network with the polycarbonate or high index
The network will be distorted in the periphery of the lens is only apparent in the center of the lens.
Select aspherical, in my opinion is the best material for your daughter ... gruaduacion
This provides more security for our children, visually.
CHANCE!
Optometrist!
Footprints hate cops. Even if a value poly Abbe other materials, many people get on very well with him. It has about 25 years and is much better today than then. Regardless of material to choose, you have a small frame. Make sure that the edges of the lenses are thin. Some prices only optical lenses as thin as possible. Will not be accepted if the outer edge is larger than 2 mm thick. An agreement that their daughters camera will be difficult to break, regardless of the material.
Sunglasses do in life, for a start, so I've seen them all, though unevenly distributed, plus 8 plus 12's, 15's, least of all.
My advice would be to glasses that are round, square or rectangular, do not choose, because they actually show up to the thickness.
Then enjoy a high index lens. Polycarb lenses IMO with a specific recipe, the distortion is much used your daughter to see clearly.
Since your daughter is a 8.00 + -1.50 @ 90 and 8.25 -1.50 @ 80 is a very high prescription. I personally recommend, in good faith Lens High-index 1.67 or 1.74.
Of course it can, an aspherical lens, which means it gets a little flat, but I really believe in this case would be better for them a high rate by thinning and improves clarity of vision.
Since it is only 8, which means that you can ship smaller, which is a good thing, but they can (so-called knives have an advantage because BL) and small thin as possibleANKING (to reduce the thickness of the lens)
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