High index 1.74 lenses are the newest technologically advanced ultra thin lenses that offer a more aesthetic look for individuals who wear thick lens eyeglasses, which cause the eyes to appear magnified. They also are available to individuals who wear glasses that cause the eyes to appear smaller than they truly are.
High index lenses available in the United States are normally made from plastic materials offering faster fabrication and less weight compared to glass lenses. Additionally, plastic lens can be placed in a wide variety of different frames. These lenses are less dense as they usually have a specific gravity level that is lower than the counterparts of traditional plastic and glass. When adding up the advantages of thinner lenses and lighter frames, the result is glasses that weight less and are less bulky. In addition, with these lenses, the eyes appear normal sized, offering an improved appearance.
High index lenses also are available in aspheric shapes and designs. With this aspect, the front curvature of the lens is gradually changed towards the edge of the glass. This feature allows the individual’s eyes to look normal sized instead of minified or magnified. Aspheric designs also make the use of thinner lens possible, adding to the aesthetic value. High index lenses, when worn by those who are near-sighted, offers a more apparent change in appearance, when compared to far-sighted individuals. Because of the changes in the materials of the lens, they can be thinner in the center of the lens and when these lenses are combined with an aspheric design, they offer noticeable changes in appearance.
Although these lens reflect more light than regular glass or plastic lens, high quality lenses are offered with an anti-reflective coating. Anti-reflective coating not only cuts down on the amount of glare that occurs during night driving, but it also offers better aesthetics in person and when being photographed. When choosing these lens, smaller frames are best suited with the 1.74 lens. Because there is less lens used, thickness and weight are reduced. Choosing frames that are smaller also reduces the amount of aberrations that can be experience, especially for those who need strong corrective eyewear.
Most ultra thin lenses are offered in both UVB and UVA rays that are available in transitions, photochromic, tinted, polarized and mirrored. For those who require strong corrective eyewear or currently wear wrap arounds or large frame glasses, these new high quality lenses not only offer improved aesthetics, but provide lighter and less bulky eyewear. Glass ultra thin lenses are also available, when doctor recommended.
Vizio Optic carries Hi Index 1.74 lenses and you can purchase them with your glasses. See www.viziooptic.com/eyeglass-prescription-lenses.aspx for additional information.