Lens Color

Lens Thickness/ Lens Index

Photochromic & Transitions® Lenses Introduction

How to choose lenses?

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

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

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

Lens Functions

Do you offer bifocal or progressive lenses?

What is the material of your lens?

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

How to use progressive glasses?

Difference between Spherical Lens and Aspherical Lens

Do the lenses include any coating?

Do you have prism lenses?

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

Which kind of lenses are free?

What type of bifocal lens do you use?

Spherical VS Aspherical Lens (video)