Lens Color

Lens Thickness/ Lens Index

Do you have prism lenses?

What coatings and add-ons do you offer for your lenses?

Photochromic & Transitions® Lenses Introduction

Can I buy lenses only to fit into my old glasses frame?

How to choose lenses?

What is the difference between single-vision and bifocal/progressive lenses?

Do the lenses include any coating?

How to use progressive glasses?

Lens Functions

What's the difference between basic coated lenses, standard coated lenses and blue-light blocking lenses?

What is the material of your lens?

Difference between Spherical Lens and Aspherical Lens

Do you offer bifocal or progressive lenses?

What type of bifocal lens do you use?

Spherical VS Aspherical Lens (video)

What're the difference between Tint lens, Photochromic lens and polarized lens?

Which kind of lenses are free?