Types of Eyeglass Lenses

Tint Color:

The lens color can vary according to the style, purpose and fashion, but for normal use grey, green, red or brown are used to minimize or avoid color distortion, which affects safety when, for example, driving a school bus or car.

The tint color determines the light spectrum parts which are absorbed in the lenses. Producers use various colors for producing specific results.

  • The Gray tints are fantastic all-purpose tints which reduce the overall level of brightness with the lowest levels of color distortion. These lenses offer beyond average protection against glare, which makes them a perfect choice for general use and driving.
  • The Gold and Yellow tints reduce the levels of blue light and allow a larger part of other frequencies in. Since blue light normally bounces and scatters off a number of things, and it could create a type of glare named “blue haze”. The yellow tint practically eliminates the entire blue section of the light spectrum and can make everything sharp and bright. That is why snowboarding glasses are normally yellow. The tint really warps color perception, and that makes it unusable for any activity which relies on accurate colors.
  • Brownish and Amber tints are also valuable general purpose colors. They have an added benefit, reduce glare and possess molecules which absorb higher frequency colors, like blue, with the harmful UV radiation. There has been study which suggests that the near-UV frequencies like violet and blue can contribute to cataract formation over time. Sun Tiger has in fact a good patent on a version of those called Blue Blockers. The sunglasses distort colors much like yellow lenses, however with increased clarity and contrast.
  • Green lens tints filter some of the blue light, reducing glare. As green tints have the greatest visual acuity and highest contrast of all tints, they are quite popular.
  • Rose and Purple tints offer the highest contrast of objects on a blue or green background. They are a good choice when water skiing or hunting.

Types of lenses

As technology goes forward so do eyeglass lenses, too. Previously, eyeglass lenses were manufactured exclusively from glass. Today, eyeglasses are mainly made from high-tech plastics. The new lenses are light, are not as easily breakable as the glass lenses, and could be fitted with a filter for shielding your eyes from the damaging ultraviolet rays. The following modern lenses are thinner, lighter, more scratch-resistant compared to glass or plastic lenses.

  • Polycarbonate lenses. Those eyeglass lenses have impact resistance and are the perfect choice for people that regularly take part in sports activities, work with a job environment where the eyeglasses might be easily broken or scratched, and for children that may easily scratch the eyeglasses. Polycarbonate lenses provide ultraviolet protection as well.
  • Trivex lenses. They are made from a new plastic with similar properties like polycarbonate lenses. It’s ultra lightweight, thin, and super impact-resistant, which results in higher vision correction in some people than polycarbonate lenses.
  • High index plastic lenses. Made for people that require strong prescriptions, the high index lenses are thinner and lighter than those standard, thick and "coke bottle" lenses which may otherwise be used.
  • Aspheric lenses. The eyeglass lenses are quite unlike the typical spherical-shaped lenses. Aspheric lenses feature many different curving degrees over their surface, which lets the lens be flatter and thinner than normal ones. That also makes for eyeglass lenses with a larger usable part than the standard ones.
  • Photochromic lenses. Crafted from either plastic or glass, the eyeglasses change from tinted to clear when exposed to direct sunlight. That eliminates the need to prescribe sunglasses. The eyeglass lenses might not darken in your car as the windshield blocks the ultraviolet radiation from the sunlight.
  • Polarized sunglasses. Light reflecting from water or some flat surface could causes unwanted glare. The Polarized lenses reduce this glare and are used in sports or driving. The lenses might cause liquid crystal displays on car dashboard to appear invisible.