Effect of refractive index on visual acuity in the aged
Lens thickness
For the elderly with high myopia or farsightedness, it is more appropriate to choose a lens with a high refractive index. The ...
eyeglass
Optical property
Clarity: Quality sunglasses lenses at any Angle to see the object should be clear, no deformation, no double shadow. You can rotate the lens slightly by observing distant ...
1.Wearing glasses can correct your vision
Myopia is caused by the fact that the distant light cannot be focused on the retina, causing distant objects to be unclear. However, by wearing a myopic le...
Material aspect
Look at the material composition: high-quality metal spectacle frames often use titanium alloy, pure titanium, etc., with light weight, high strength, corrosion resistance, anti-all...
What is the difference between resin lens and pc lens, which is good?
Resin lens and PC lens as the two mainstream materials of modern eyeglass lenses, each has its own unique characteristics and a...
Consider face shape
Round face: suitable for square or rectangular eyeglass frames, so that you can use straight lines to neutralize the roundness of the face, increase the three-dimensional sense ...
