Lens Thickness/ Lens Index

Lens Color

Photochromic & Transitions® Lenses Introduction

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

How to choose lenses?

Do you have prism lenses?

Lens Functions

Difference between Spherical Lens and Aspherical Lens

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

How to use progressive glasses?

What is the material of your lens?

Do you offer bifocal or progressive lenses?

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

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

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

Which kind of lenses are free?

Do the lenses include any coating?

What type of bifocal lens do you use?

Spherical VS Aspherical Lens (video)