Lens Thickness/ Lens Index

Lens Color

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

How to choose lenses?

Photochromic & Transitions® Lenses Introduction

Do you offer bifocal or progressive lenses?

Lens Functions

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

How to use progressive glasses?

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

Do the lenses include any coating?

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

What type of bifocal lens do you use?

Do you have prism lenses?

What is the material of your lens?

Difference between Spherical Lens and Aspherical Lens

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

Which kind of lenses are free?

Spherical VS Aspherical Lens (video)