Who should get 1.74 high index lenses?

Who should get 1.74 high index lenses?

1.74 High Index They are recommended for individuals with a strong eyeglass prescription, typically for powers above +3.00 because they are aspheric in design. The 1.74 is made thinner and flatter than standard spherical lenses, which helps reduce the magnification of the eyes.

Whats the difference between 1.6 and 1.74 lenses?

A mid-index lens of refractive index 1.6, approximately 20% thinner than a standard lens. A high-index lens of refractive index 1.67 will be approx. 33% thinner, whereas a lens with a refractive index of 1.74 will be around 42% thinner.

What are the different types of high index lenses?

1.67 high index lenses are available in more colors: both come in clear, gray tinted, and brown tinted, but only 1.67 comes in Transitions brown or gray. 1.74 high index lenses are better for those looking for the thinnest lens possible; generally, people with extremely high prescriptions choose this option.

What are the best lenses for high prescription patients?

1.74 high index lenses are better for those looking for the thinnest lens possible; generally, people with extremely high prescriptions choose this option. 1.67 high index lenses are better for those looking to save money or those who do not have extremely high prescriptions.

What is the difference between high index glasses and normal glasses?

A standard plastic is about 1.5, and glass is about 1.51. High-index options start at 1.53, though at this point, the difference to regular eye-wear is minute. The higher that number, the thinner the lens will be even with the strongest types of prescriptions.

What is a high index of refractive index?

When the refractive index is 1.7 or more, the lens is usually about 50% thinner than it’s glass or plastic counterpart would be. Most lenses these days come in high index materials such as the following:

Related Posts