<p><strong>a.&nbsp;&nbsp;&nbsp;&nbsp;</strong><strong>Standard Spheric 1.50 Lens</strong></p> <p>Standard index 1.50 lenses are&nbsp;spheric lenses, come&nbsp;with anti-scratch hard coating&nbsp;and 85-90% UV protection&nbsp;coating (Please choose higher index lenses to get 100% UV protection), and are shatter-resistant, suitable for spherical power +/-1.00 or below, and cylindrical power +/-1.00 or below.</p> <p><strong>b.&nbsp;&nbsp;&nbsp;&nbsp;</strong><strong>Super Flex Aspheric 1.56 Lens</strong></p> <p style="margin-left:0pt; margin-right:0pt; text-align:justify">Super flex 1.56 lenses are super light and highly impact-resistant&nbsp;with 100% UV protection&nbsp;coating. These lenses are recommended for rimless and sports eyeglasses. The lenses are suitable for spherical power of +2.00~+4.00/-2.00~-3.00 or below with cylindrical power +/-2.00 or below.</p> <p><strong>c.&nbsp;&nbsp;&nbsp;</strong><strong>Thin </strong><strong>Spheric</strong><strong>&nbsp;</strong><strong>1.56 Lens</strong></p> <p style="margin-left:0pt; margin-right:0pt; text-align:justify">Thin Spheric (1.56) lenses are with anti-scratch hard coating&nbsp;and 85-90% UV protection&nbsp;coating (Please choose higher index lenses to get 100% UV protection). The higher index lens greatly reduces the thickness of the lens edge, and are suitable for spherical power of +2.00~+4.00/-2.00~-3.00 or below, and cylindrical power of +/-2.00 or below.</p> <p><strong>d.&nbsp; &nbsp;</strong><strong>Super Flex Aspheric&nbsp;</strong><strong>1.60 Lens</strong></p> <p>Super flex 1.60 lenses are super light and highly impact-resistant&nbsp;with anti-scratch hard coating and 100% UV protection&nbsp;coating. These lenses are recommended for rimless and sports eyeglasses. High index is suitable for spherical power of +4.00~+6.00/-3.00~-6.00 or below with cylindrical power +/-2.00 or to +/-3.00.</p> <p><strong>e.&nbsp;&nbsp;&nbsp;</strong><strong>Advanced-Thin&nbsp;</strong><strong>Aspheric</strong><strong>&nbsp;1.60 Lens</strong></p> <p>Advanced-Thin Aspheric (1.60) lenses are high index lenses with anti-scratch hard coating&nbsp;and 100% UV protection coating which are suitable for wearers with spherical power from +4.00~+6.00/-3.00~-6.00, and with cylindrical power from +/-2.00 to +/-3.00.</p> <p><strong>f.&nbsp; &nbsp; Super Thin 1.67&nbsp;Aspheric</strong><strong>&nbsp;Lens</strong></p> <p>Super Thin Aspheric (1.67) lenses are light, thin and scratch-resistant&nbsp;with 100% UV protection&nbsp;coating. Also, they are more impact-resistant than CR-39 resin lenses. They provide optical performance similar to glass lenses, as MR-7 lenses have a high index and Abbe number. The lenses are suitable for strong prescription, with spherical power from +/-6.00~+/-9.00 and cylindrical power from +/-3.00 to +/- 4.00.</p> <p><strong>g.&nbsp; &nbsp;Ultra Thin 1.74 Aspheric&nbsp;Lens</strong></p> <p style="margin-left:0pt; margin-right:0pt; text-align:justify">Ultra Thin Aspheric(1.74) lenses are with 100% UV protection&nbsp;coating&nbsp;and suitable for strong prescription, with spherical power from +/-9.00~+/-22.00 and cylindrical power from +/-3.00 to +/- 4.50.</p> <p>&nbsp;</p> <p>See the example below for how the thickness of a -4.00 prescription lens changes with each of our available indexes.</p> <p><img alt="" src="https://df5apg8r0m634.cloudfront.net/images/2018/0228/U18vB0MMZD.jpg" /></p> <p>The higher index materials allow for flatter curved lenses that are still able to maintain an aspheric design. Both of these features help produce thinner and lighter lenses.</p> <p><strong>Notice</strong>:</p> <p>1. <strong>The ultimate thickness of the lenses is determined by the frame size (including lens height, lens width), frame material and your PD. </strong>If you choose a big frame the lens edge will undoubtedly be thick. Frames with thin metal rim will also make the lens look thicker. If the frame is not the best for your PD, the lens may not be beautiful and thin as you expect.&nbsp;</p> <p>2. It is important to choose suitable lens index according to your prescription, which will not only impacts&nbsp;aesthetics/thickness of lens, but also with more comfort. When you try to order and fill in prescription, our website will recommend the suitable lens index for you automatically. If you are not sure, simply email your original prescription picture to service@firmoo.com. Our CSR will try best to help you.</p>
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