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What is the difference between polycarbonate, glass or CR-39 plastic lenses?Glass: Glass offers the best optical clarity, meaning that there is virtually no distortion in glass lenses. This is why it is the material of choice in manufacturers such as Ray-Ban, Revo, Vuarnet, and Serengeti. However, glass is the least impact resistant of all of the material, and may shatter upon impact. Shattering means that the lens will split into small pieces which can easily enter the eye and cause permanent eye injuries or even blindness. Therefore, glass is not recommended for any active sports where a fall or a hit by a ball can shatter the lens. It is also the heaviest of all the materials which may limit the length of time these lenses can be worn. However, glass is the most scratch resistant of all materials. Plastic: CR-39 refers to the type of plastic that is used to make prescription lenses. This is optical plastic and provides very little distortion (more than glass but less than polycarbonate). It is more lightweight and thinner than glass making it comfortable to wear. It is more impact resistant than glass, but may still break and shatter upon impact. Therefore, it is not recommended for active sports. It is more scratch resistant than polycarbonate, but will scratch if not properly taken care of. Polycarbonate: Polycarbonate is an impact resistant material. Most good polycarbonate can be shot at with a .38 caliber bullet and not shatter. It is becoming used more and more today especially for sports eyewear and sunglasses. Although polycarbonate is impact resistant, it should not be consider breakproof or shatterproof. However, polycarbonate is the strongest material available and will have the tendency to break in large pieces versus small pieces which are not as dangerous. Polycarbonate is the thinnest and lightest of all materials. However, the lens also has the most distortion of any lens, especially in wrap frames unless the lens is decentered. However, only those very sensitive to distortions will really notice it. Although tough, the material is actually softer meaning it is more susceptible to scratches. However, most polycarbonate lenses have scratch resistant coatings built in to help prevent scratching. Trivex(Phoenix): Phoenix originated in the defense industry. It is as safe as polycarbonate but offers better optical clarity (same as CR-39 plastic). They are also more scratch resistant than standard polycarbonate and is more resistant to chemicals. Trivex meets FDA and ANSI Z87.1 impact safety standards at 1.3mm. It is the lightest lens available. 100% UV protection is also standard and does not need to be added. Back to TopWhat shipping methods are offered?Click here for shipping options. Back to TopWhat do you need to fill my prescription?See the prescription information page here. Back to TopWhat does "eyesize" refer to?Eyesize is a term we use in the optical industry to measure frames. The first number in the eyesize refers to the distance in millimeters across (horizontally) one lens. The second number in the eyesize refers to the distance between the two lenses or bridge size (measured in millimeters). This information can help assist you in sizing a frame for your face. To better understand the frame size, double the first number and add the second. This will give you the distance across the full front of the frame. For example, an eyesize of 51/16 means that the frame measures 118 mm across (51 x 2 + 16 = 118). You can then put the ruler up on your face to see how big the frame will be on you. If you only have inches on your ruler, 25mm equals 1 inch. So, in our example, this frame would measure 4.72 inches (118 divided by 25). Or, if you wear glasses, you can easily compare this measurement to your glasses. Look on the bridge of your frame or on the temples. You should see a similar number separated by a box. This is your frame's measurements. You can see how it compares to the frame you are looking at on our website. Back to TopDon't all sunglasses have UV protection? Why do I have to have 100%?See UV information page here. Back to TopWhat happens if I don't like the sunglasses once I get them?See return information here. Back to TopIs there any place I can try the glasses on before I purchase them?Unfortunately, we only have one retail location in Portland, Oregon. However, we do offer a buy, try and return option. You simply order all the styles you would like to try (limit 3). You will be charged, but your order should come to over $50 so there will be no shipping charge. Try on the items, and return the ones that you don't like for a full refund. The only thing you have to lose is the small shipping charges to return the items to us, which is equivalent to what you would pay to ship the glasses to you if you knew exactly what you wanted. We don't discourage this policy as we know sunglasses are a difficult item to purchase without trying them on. This is especially true for prescriptions. Since prescriptions are not returnable, it is best to try them on first, then send them back to have the prescription lenses made. Back to TopI have a gift certificate. How can I use it?To use your gift certificate with an on-line purchase, simply place the code located on the certificate in the comments section of the order form. We will apply the gift certificate to your order when we process it. You will only be charged for the difference between your order and the certificate amount. To use your gift certificate when ordering by phone, simply tell the operator your code and we will apply the gift certificate at the time of the order. Back to TopI have a GiveAnything.com gift certificate. How can I use it?If your order total is less than the amount of your GiveAnything.com Gift Certificate, simply select the GiveAnything.com payment method, then place the certificate number in the comments section of the order form. We will verify the certificate, and then ship your order. If you order total is greater than the amount of your GiveAnything.com Gift Certificate, select a payment method for the balance (i.e. credit card, check, money order, etc.) Then place the certificate number in the comments section. We will verify the certificate and then apply the certificate to your order total. You will be charged only for the difference between the order total and the gift certificate. To use your gift certificate when ordering by phone, simply tell the operator your code and we will apply the gift certificate at the time of the order. Back to TopI have an on-line coupon. How do I use it?To use your coupon with an on-line purchase, simply place the code located on the coupon in the comments section of the order form. We will apply the gift certificate to your order when we process it. You will only be charged for the difference between the order amount and the coupon amount. To use your coupon when ordering by phone, simply tell the operator your code and we will apply the coupon at the time of the order. Back to TopWhat is a PD and how do I get it?See the prescription information page here. Back to TopWhat
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