A segment, usually with a line at the bottom of the lens. Single Vision lens is a lens commonly used to for either near, intermediate or distance vision, depending on what your visual needs are as determined by your doctor.īifocal lens is used for patients who need to see distance and near with their glasses on. Manufacturers of polarized lenses include:.
SPECTACLE EYEWEAR FULL
Excellent for water, snow, and full sun activities. Provide UV protection and are scratch resistant. Automatically included on premium lens materials. An invisible surface treatment that protects the lens. Ultraviolet radiation is known to cause cataracts. All premium lens materials are UV protective. Major brands of photochromic lenses are:. Delivers a variable tint in a variety of colors. Premium anti-reflective products include Crizal®, Zeiss and Unity products. Increases optical performance of the lens. For these two reasons most people have chosen to switch to the lighter and safer materials. Glass provides more scratch resistance but is much heavier than plastic and not as safe as the plastic, polycarbonate, or trivex materials. Glass lenses are the oldest material on the market. If you have had glasses in the past that were heavy or thick, high index lenses may be the ideal solution to the problem. The availability of this new material has allowed the consumer a wider range of frame choices, and offers premium product to those with more challenging prescriptions. This is the newest lens material available providing the absolute thinnest option. These lenses are a form of hybrid plastic usually lighter in weight, and denser than standard plastic offering the individual a thinner, and lighter option for a more cosmetic appeal. This allows for a more comfortable fit and a more cosmetically appealing pair of glasses. Polycarbonate material is lighter and 18% thinner than plastic. Polycarbonate is one of the safer materials made. Trivex has 3 main features: clarity, strength and light weight. 
It also possesses a superior impact resistance suitable for children. This is a material that has similar optical qualities of glass lenses, but offers the weight benefit of plastic material. It is known as either Phoenix, NXT, Aris or Trilogy. There are different name brands for the Trivex lens material. While this coating does protect the lens it is not a guarantee that they are “ scratch proof“. This is a coating that is added to the lens to help shield them from scratching. You will often hear the term “scratch resistance”. Plastic lenses are one of the more popular lens materials used today. We offer lenses from leading manufacturers such as Essilor®, Shamir, and VSP in order to provide you with the greatest comfort, highest quality and most current technology. There are many different lens materials to choose from.
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