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Doctor insights on: Polishing Polycarbonate Lenses

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Is polycarbonate eyeglass lens expensive?

Is polycarbonate eyeglass lens expensive?

A little more: Polycarbonate lenses have a higher index of refraction and can be made a little thinner which lightens the eyeglasses and makes them more comfortable. So they charge a little more for them. I consider eyeglass costs way too high for the technology and manufacturing costs, but it is an industry charging what the public will put up with. ...Read more

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Are polycarbonate lenses helpful?

Are polycarbonate lenses helpful?

Yes: These are high index eyeglass lense materials which allow a thinner eyeglass and for a given power of lens, are lighter than glass or ordinary plastics. This is helpful to the nose which would otherwise have to support a heavier lense. ...Read more

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Can one remove scratches from eyeglasses with polycarbonate lenses?

Can one remove scratches from eyeglasses with polycarbonate lenses?

Not easily: Scratches in polycarbonate lenses involve the removal of plastic in the scratch. To smooth it out you would need to grind this away which would alter the power of the lense and might induce some distortion. Check with an optical shop to see if some correction is possible or replacement is needed. ...Read more

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Can people with myopia wear toric lenses?

Can people with myopia wear toric lenses?

Yes: Toric lenses are used to correct astigmatism so if you have myopia and astigmatism you can wear toric lenses. If you only have myopia you will not need them. ...Read more

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Are spherical contact lenses recommended for astigmatisms?

Are spherical contact lenses recommended for astigmatisms?

Depends: On how much astigmatism is present. People with small amounts of astigmatism (usually 1 diopter or less) see well with spherical contact lenses. ...Read more

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Are polycarbonate lenses the only viable option for rimless eyeglasses?

Are polycarbonate lenses the only viable option for rimless eyeglasses?

No: There are other materials which can be used, trivex for example. ...Read more

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Disposable contact lenses good for anisometropia?

Disposable contact lenses good for anisometropia?

Yes: Actually any contact lens is good for anisometropia. This term means that there is a significant difference in the prescription of the eyes which can make it difficult for the brain to fuse the images from the two eyes into one. The contact lenses allow the eyes to see images which are more alike in size which makes it easier to fuse the images. ...Read more

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Are toric contact lenses effective for my astigmatism?

Are toric contact lenses effective for my astigmatism?

If fit properly: Wearing toric contact lenses is a common way to correct astigmatism. They are comfortable and easy to use. ...Read more

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Polycarbonate vs plastic lenses best for high myope?

Probably polycarb: Polycarbonate lenses are "high index" lenses . They are often used in high myopes to allow for the glasses to be thinner and lighter. They do have more chromatic aberration though. Discuss the various pros and cons with your optician before deciding what it right for you. ...Read more

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Is wearing contact lens better or spectacles?

Is wearing contact lens better or spectacles?

Personal choice: There are a few refractive needs that contact lenses will correct better such as high myopia and keratoconus. But for most, the visual needs can be met with either device. So it is a personal choice about convenience and cosmetics for most. ...Read more

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Could myopia reverse when using convex lens (magnifying lens).?

Could myopia reverse when using convex lens (magnifying lens).?

No: Lenses do not change the eye. A convex lens would be the opposite of what a myope needs which is a concave lens. ...Read more

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Can contact lenses correct astigmatism?

Can contact lenses correct astigmatism?

Mostly: Hard lenses can do this for most cases. Thee are a variety of soft toric lenses which also correct astigmatism. ...Read more

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Can aspheric eyeglass lenses help nearsighted people?

Aspheric glasses: Aspheric glasses may minimize induction of aberrations in nearsighted people but usually not to a clinically significant degree. That being said you are better off spending your money on high index glass to minimize the thickness and weight of your glasses. Contact lenses are also a very good option. ...Read more

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Are crizal lenses recommended for myopic eyes?

Are crizal lenses recommended for myopic eyes?

Maybe: Crizal is an anti-reflective and anti-scratch coating that will allow more light through your glasses and make them last longer. It is a reasonable investment. ...Read more

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Yellow sclera when wearing contact lens?

Same: Th color of the sclera should not be affected by contact lens wear. If anything , the conjunctiva may be a little injected (red) with cl use.If you are only seeing a color change on the white of the eye next to the pigmented iris, you may be noticing a handling tint found on most contacts. ...Read more

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What are ortho-k lenses used for: myopia (nearsightedness) or astigmatism?

What are ortho-k lenses used for: myopia (nearsightedness) or astigmatism?

Both: Ortho-k is an expensive and non-sensible treatment. With this, you wear contact lenses while you sleep that mould the cornea. This allows better vision. During the day, the cornea reshapes itself to normal. What this means is that you see well for a few hours and your vision fades as the day progresses. A more sensible and cheaper solution is to wear contact lenses during the day. ...Read more

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Is wearing contacts for astigmatism effective?

YES: Absolutely! many of the new astigmatism/toric contact lenses provide both excellent vision and comfort. ...Read more

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Are polycarbonate lenses helpful?

Yes: These are high index eyeglass lense materials which allow a thinner eyeglass and for a given power of lens, are lighter than glass or ordinary plastics. This is helpful to the nose which would otherwise have to support a heavier lense. ...Read more

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Please advise what is the difference between polycarbonate and polyaspheric lenses?

Not related: polycarbonate refers to the material that a lens is made from. Sphericity relates to the way the lens is ground. ...Read more

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Is polycarbonate eyeglass lens expensive?

A little more: Polycarbonate lenses have a higher index of refraction and can be made a little thinner which lightens the eyeglasses and makes them more comfortable. So they charge a little more for them. I consider eyeglass costs way too high for the technology and manufacturing costs, but it is an industry charging what the public will put up with. ...Read more

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What are some alternative names for polycarbonate eyeglass lenses?

Safety glasses.: Polycarbonate (a type of plastic) in cetain thicknesses and specifications, is the type of material used in most industrially used safety glasses. It is reputed to be able to stop a speeding bullet (depends on the speed and type, of course)! most high-index eyeglass lenses these days are made of alternate material with better optic quality than polycarb. ...Read more

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Glasses- polycarbonate lenses, what are these and what are the benefits?

Glasses- polycarbonate lenses, what are these and what are the benefits?

Polycarbonate: Polycarbonate is a shatter-resistant plastic that is used in all children's glasses and in safety glasses. It is also used for certain types of glasses frames because of its toughness. ...Read more

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I was wondering what are the differences between polycarbonate, polycarbonate aspheric, and 1.67 high index lens?

I was wondering what are the differences between polycarbonate, polycarbonate aspheric, and 1.67 high index lens?

Lens materials: Polycarbonate and 1.67 high index are different types of plastics used to make lenses for glasses. Aspheric is a type of lens design. Generally the higher index of the plastic, the thinner the lens can made. Higher index materials may induce more distortion in the periphery of the vision. ...Read more

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Can one remove scratches from eyeglasses with polycarbonate lenses?

Not easily: Scratches in polycarbonate lenses involve the removal of plastic in the scratch. To smooth it out you would need to grind this away which would alter the power of the lense and might induce some distortion. Check with an optical shop to see if some correction is possible or replacement is needed. ...Read more

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Are polycarbonate lenses the only viable option for rimless eyeglasses?

No: There are other materials which can be used, trivex for example. ...Read more

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Polycarbonate vs plastic lenses best for high myope?

Probably polycarb: Polycarbonate lenses are "high index" lenses . They are often used in high myopes to allow for the glasses to be thinner and lighter. They do have more chromatic aberration though. Discuss the various pros and cons with your optician before deciding what it right for you. ...Read more

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I have a crack a polycarbonate eyeglass lens starting at the edge. What would happen if hit by ball?

I have a crack a polycarbonate eyeglass lens starting at the edge. What would happen if hit by ball?

Hit by ball?: If you're wearing these eyeglasses when the ball hits you, you could get a real headache. Take care out there! ...Read more

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Can using polycarbonate lens while using desktop PC with lcd reduce eye fatigue?

Can using polycarbonate lens while using desktop PC with lcd reduce eye fatigue?

No: Polycarbonate is simply a type of plastic. Things that can help include tints, anti-reflective coatings, glare filters on your monitor and adjustments of lighting. Some people also benefit by changing the color settings on their monitors and sitting further away from the screen. Lubricating eye drops are beneficial and, of course, frequent breaks. ...Read more

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I accdently shallowed a small piece of plastic that may have been polycarbonate plastic it was smaller than a dime I think. Will I die?

I accdently shallowed a small piece of plastic that may have been polycarbonate plastic it was smaller than a dime I think. Will I die?

Not likely: Polycarbonate plastic is inert. With relatively small size of dime, it can usually passes through the gastrointestinal tract without overt risk of obstruction within 24 to 72 hours. However, in rare circumstances, the object can cause obstruction if a person has per existing congenital abnormality, such as achalasia, pyloric stenosis, or other intestinal or colonic stricture. ...Read more

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How can I tell if my eyeglasses are polycarbonate?

See below: Take them to your optician and ask. They will be able to help you. ...Read more

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What is a better choice-- toughened glass or polycarbonate safety spectacles?

What is a better choice-- toughened glass or polycarbonate safety spectacles?

Polycarbonate: Current ansi standards recommend the use of polycarbonate in safety glasses for work use. Hardened glass was the precursor. ...Read more

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If an optometrists checks off polycarbonate under "doctor recommends" stuff, what is polycarbonate?

If an optometrists checks off polycarbonate under "doctor recommends" stuff, what is polycarbonate?

Eyeglass lens: This is a higher index plastic lens used to give power without too much thickness. Your optom feels that with the power you have , that you need that extra thin-ness in your eyeglasses for comfort. ...Read more

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Why do my fingernails hurt after polish remover?

Why do my fingernails hurt after  polish remover?

Nail doesn't hurt: Nail doesn't hurt. It has no nerve. It's the skin around nails hurt. So-called periungual dermatitis caused by nail polish remover-chemical would be irritating, itching and sometimes, painful. ...Read more

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What are some things besides special polishes, that will make my nails stronger?

What are some things besides special polishes, that will make my nails stronger?

Dermanial, gnedur: Two products that strengthen nails is otc dermanial and prescription genedur. Oral supplements that can help are digestive enzymes taken with meals and vitamins with biotin, silica, . ...Read more

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Which chemicals are in nail polish?

Which chemicals are in nail polish?

Nail polish: Numerous chemicals are in nail polish and the chemicals vary with the different products e.g. Nirocellulose, ethyl acetate, resins, plasticizers, solvent, coloring agents, adhesive poymers, formaldehydes, camphor, pigments, thickening agents, toluene, sylene and the list goes on and on. Anyone using nail polish should use products from companies that formulate responsibly and have a good reputation. ...Read more

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