1.74 Ultra-index Seiko w/ AR Coating
High index lenses with 1.70 high index and 1.74 are the thinnest lenses on the market, and are made only for people with the highest prescriptions. If your prescription is lower than +/-6.00 sphere, there is no need for you to spend the extra money for an ultra high index lens. If you do have a strong prescription, however, the 1.70 and 1.74 high index lenses will be a good deal thinner than the 1.67 and 1.60 high index lenses; the higher your prescription, the thinner the lenses will be.
What is Anti-Reflective AR coating?
Anti-reflective coating (aka, no-glare, AR) is a series of layers that is adhered to the back and front surface of a lens, or just the back of the lens if the lens is polarized. The purpose of no glare coating is to help reduce the amount of reflections on the lens. Consisting of metal oxides, each layer is a thin film that is designed to block a specific wavelength of light. The more layers of film, the more wavelengths that are blocked. AR coating causes the light that reflects from the inner and outer surfaces of each film layer to become equal, thereby canceling each other out.
** Prescription Required **
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2. Write your prescription3. e-mail original prescription to eyejoaoptic@gmail.com