In terms of balancing price and quality 1 59 index polycarbonate lenses accommodate most prescriptions and are extra durable.
Lens thickness best frames for high prescription.
Those who have a mild prescription of say 2 00 diopter do not need high index lenses because their lenses will already not be very thick nor have a distortion issue.
The eye area may appear smaller or seem to recede.
But for thick lenses a small frame works best as the thickness of the lens must be increased to accommodate the width of the frame.
Another option for your prescription eyeglasses is to purchase high refractive index lenses.
These ultra light ultra sleek lenses are the thinnest kind developed yet and accommodate the highest prescriptions possible.
When you have a medium or strong prescription you need a high index lens to keep your lenses thin.
If you have thick prescription lenses rimless or semi rimless frames may not be strong or sturdy enough to hold thick lenses.
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Works best in rimless and semi rimless frames.
It is nearly impossible for opticians to create a lens of a certain thickness to fit inside frames with sharp angles.
The thinner and lighter 1 67 index up to 45 thinner and 45 lighter than the 1 5 lens.
However if you have a higher prescription of say 7 00 diopter the high index lens will not only be thinner and lighter but cause minimal distortion.
1 74 index lenses are the thinnest lenses for high prescriptions available.
All three lenses are made with similar materials so the choice of index comes down to your prescription strength.
Thinner lenses are lightweight and more stylish and can accommodate many kinds of vision needs including higher prescriptions.
However narrow frame shapes may be too small to accommodate heavy lenses.
5 rimless frames also tend to be lightweight and may not be a good fit for a thick lens or a lens made of heavy material.
Essentially the best frame shape for a strong prescription is a smaller round or oval frame.
High index lenses have good optical clarity 100 uv protection and excellent durability.
They currently come in indices of 1 61 1 67 and 1 74.
Thicker lenses are more affordable but can only accommodate lower vision correction needs.
When choosing the best frames for high prescription it is important to pick the right frame material lens and company here are four tips that will save you a lot of time money and hassle.
Widening the prescription leads to distortion so the bigger the frame the more distortion there is.
Metal full frames are a great choice.