MOQ: 1 pairAll kinds of prescription optical lensesIndex
1.49/1.56/1.61/1.67/1.74We can supply
UC/HC/HMC/SHMCWhite/Grey/Brown/Grey Anti-blue/Brown
Anti-blue Delivery time:2-3 daysPlease don't hesitate to
contact us! What is Lens Index?The lens index refers to the
index of refraction (otherwise known as refractive index) of lens
material for eyewear. It is a relative measurement number that
describes how efficiently the material bends light. Light
refraction will depend on how quick light itself passes through the
lens. Refractive IndexLens materials are classified on their
refractive index. This refractive index is the ratio of the speed
of light when it travels through air to the speed of light when it
passes through the lens material. It is an indication of how much
light is bent as it travels through the lens. Light is refracted,
or bent, at the front surface of the lens, then again as it exits
the lens.A denser material bends light more, so not as much
material is needed to achieve the same refractive effect as a less
dense material. Hence the lens can be made thinner, and also
lighter.With regular eyeglasses lenses, the center of the glasses
is thinner and the outer edges are thicker to facilitate refraction
which is what makes prescription glasses work! High index lenses
have a higher index of refraction than regular lenses, which means
they don't need to be as thick around the edges to be
effective.High-index lenses mean that the lens itself can be
both thinner and lighter. This allows your glasses to be as
fashionable and comfortable as possible. High-index lenses are
particularly beneficial if you have a strong eyeglass prescription
for nearsightedness, farsightedness, or astigmatism. However, even
those with a low eyeglass prescription can benefit from high index
lenses./* January 22, 2024 19:08:37 */!function(){function
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