LUV My Vision, we only sell the highest quality branded prescription eyeglass lenses from the world’s best makers. All of our lenses come with a “Perfect Lenses Guarantee”, and we personally review every lens order. Almost all of the online dealers of prescription lenses sell low-quality, cheap lenses, which can lead to poor vision. Don’t cheap your eyes: buy the best fromLUV My Vision, at half the price charged by your local eye doctor.
CR-39 (regular plastic) Lenses
“Regular plastic” eyeglass lenses refers to what is known in the industry as “CR-39 plastic” lenses. Regular plastic lenses have better visual clarity than the thinner polycarbonate or high index lenses, and they are less expensive. For low prescriptions, regular plastic lenses are usually the best choice for prescription lens material. However, regular plastic prescription lenses also have some drawbacks and limitations in certain situations. For example, if your prescription is higher than +/-3.00, the regular plastic lens will become thicker and heavier, and you could benefit from moving to a polycarbonate or high index lens. Also, if you have a three piece rimless eyeglass frame, you should not use a regular plastic lens because it is likely to crack under the strain. Finally, children and sporting adults are recommended for polycarbonate or high index lenses because they offer better eye protection than regular plastic lenses.
If your prescription is higher than the +/-3.00, you may want to look at a higher index (and more expensive), thinner and lighter lens. CR-39 is the standard type of plastic used for everyday use, around the office, or for shopping. These lenses have the least distortion of any non-glass lens. For children or active adults engaged in sporting activities, we strongly recommend polycarbonate (impact resistant) lenses. If the sphere on your prescription is +/-2.00 or lower, you will not benefit from the more expensive thin high index lens types. If the sphere on your prescription is higher than +/-2.00, you will benefit from the selection of a “thin” lens type. If the sphere on your prescription is higher than +/-3.00, we recommend a ‘thin’ lens type. Thinner lenses have three advantages: they do not look ‘thick’, they do not magnify or minify your eyes when seen by others, and they are lighter.
High-Index 1.59 Polycarbonate Lenses
Polycarbonate prescription lenses are the most common choice for eyeglasses for several reasons. Polycarbonate lenses are thinner than regular plastic lenses, and they offer the best eye protection capability because it is virtually shatterproof. Polycarbonate lenses are a good all around choice, even though plastic lenses have better visual acuity. Polycarbonate lenses are recommended for children and active/sporting adults. Polycarbonate lenses are a good “thin” choice for prescriptions up to +/-5.00. If your prescription is higher than that, you would achieve a thinner and lighter lens by selecting a lens with a higher index, 1.67 or above.
Polycarbonate lenses are a very common choice for prescription sunglasses. Lenses can be tinted to the color of your choice, and anti-reflective coating and/or mirror coatings can be applied. For high performance custom sunglasses, we recommend using the Trivex material, which has a better visual acuity than polycarbonate, but is also more expensive.
Ultra High Index Lenses
Ultra high index lenses are a good choice for people with prescriptions over +/-6.00 sphere. Ultra high index lenses are available in 1.67, 1.71, and 1.74; in general, the higher the index, the thinner the lens but if your prescription is at the lower end of the range, using a higher index will not result in a thinner frame. The higher the index, the denser the lens becomes which results in a lower visual acuity. Thus, you want to find the lowest index that will work well with your prescription. Ultra high index lenses all include inherent UV protection, and they have the added advantage that they have minimal distortion to the size of your eyes as seen by other people.