<p>Single vision lenses refer to lenses that have only one use, to see objects in the distance, to see intermediate like computer or phone, or to see near for reading (reading glasses), while bifocals/progressives is a type of prescription that can be used to correct both near and farsight requirements. This means you can see your whole field of vision without switching between multiple pairs of glasses.</p>
Shipping and tracking
Terms and Conditions
Lens Thickness/ Lens Index
Photochromic & Transitions® Lenses Introduction
How to choose lenses?
What coatings and add-ons do you offer for your lenses?
How to use progressive glasses?
Do you have prism lenses?
What is the difference between single-vision and bifocal/progressive lenses?
Which kind of lenses are free?
Do you offer bifocal or progressive lenses?
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?
Do the lenses include any coating?
Difference between Spherical Lens and Aspherical Lens
What're the difference between Tint lens, Photochromic lens and polarized lens?
What is the material of your lens?
What type of bifocal lens do you use?
Spherical VS Aspherical Lens (video)
30-day Return & Exchange
Unsatisfactory glasses can be exchanged or refunded within 30 days of receipt.
Covering any possible defect in materials and workmanship.