| Range of Optical Lenses Available at Goggls4u |
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| CR39 Material High Index Lenses |
CR39 is impact resistant material as per FDA requirement. This is extremely light and suitable for light to medium prescription. CR39 material can be tinted in any color. These lenses are coated with all necessary coatings.
These are available in 1.56, 1.61 and 1.67 refraction index.
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| Mineral Glass Material High Index Lenses |
Mineral Glasses lenses provides best optical clarity but they are heavier than CR39 material. Glass lenses are suitable for strong prescription. These lenses cannot be tinted. These lenses can't be used in rimless frames. They have better scratch resistance but they get easily chipped.
Theses are available in refraction index of 1.56 and 1.71 |
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| Glass Material High Index with Photocromic Brown/Gray |
| Photocromic lenses are one that change color when exposed to sunlight. These lenses remain clear indoor and goes up to 70% dark in sunlight. These are available in gray and brown color. Permanent tinting is not applicable on these lenses. The only disadvantage of these lenses is its weight compared with CR39 photocromic lenses. Glass Material cannot be used with rimless frame or frame that require drilling. |
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| CR39 Material High Index with Photocromic Brown/Gray |
| Photocromic lenses are one that change color when exposed to sunlight. These lenses remain clear indoor and goes up to 85% dark in sunlight. These are available in gray and brown color. Permanent Tinting is not applicable on these lenses. These lenses are thin and light and suitable also suitable for rimless glasses. |
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| CR39 Material Lined Simple D-Bifocal/Varifocal High Index Lenses |
Bifocal lenses are one that provide two vision correction i.e. Reading and Distance. If you need vision correction for reading and distance, you may consider ordering Bifocal Lenses.
Lined D-Bifocal lenses have a separate visible reading portion which is D-Shaped as shown in the picture.
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