How to Choose Prescription Eyeglasses Lenses
Single vision lens or progressive lens?
Before you decide what lens to install to your frame, the first choice you will make is single vision lens or progressive lens. This should be recommended by your optometrist, if you don't remember, please read your prescription, if there is ADD value, you should have progressive lens.
When you buy prescription eyeglass in NoxGlass, you may simply choose the usage, and we will use your prescription according to the usage you defined.
If you choose distance view or reading only, we will use your single vision prescription, if you choose both distance view and reading, we will use your prescription for progressive lens.
What lens should I choose for Single Vision Lens?
Basic lens 1.50
Basic lens are the standard, everyday lenses meant for people with low prescriptions. Those people who have +/- 0.25 to 2.00 prescription glasses should use basic lenses when ordering their eyeglasses. Basic lens 1.50 is free of charge.
Thin lens 1.56
Perhaps you need lighter lenses or have a prescription that runs +/- 2.00 to +/-4.00, thin lenses are around 30% lighter than basic lenses. They run great for heavier frames as well - putting less pressure on your nose and sinuses. You will be amazed at how light these lenses really are!
Super Thin Lens 1.60
If your Rx power is higher than +/-4.00, but less than 6.00, please select Super Thin Lens 1.60, which is thin and light enough, but cheaper than Ultra Thin Lens.
Ultra Thin lens 1.67
Ultra thin lenses have an index of 1.67 making them the thinnest and lightest lenses available. They are 45% thinner than a standard plastic lens and are perfect for anyone with a prescription higher than +/- 5.00. They also work best with heavier, plastic eyeglass frames keeping the frame light on your nasal passages.
Polycarbonate lenses are the best choice for anyone who plays sports or for children due to their near indestructibility. Polycarbonate lenses are also shatter resistant and extremely light weight. People with prescriptions between +/- 2.00 to 4.00 will have the best luck with polycarbonate lenses.
The Trivex lens has impact resistant properties similar to polycarbonate. These lenses are light in weight, unbreakable and scratch-free. It was designed specifically for drill mount frames.
What lens should I choose for Progressive Lens or No-line Bifocals?
Progressive lenses, sometimes called "no-line bifocals", are a type of eyeglass lens used to provide visual correction to both near view and distance view. Wearer can see near, far and everything in between with one lens.
There are two index available for progressive lens, 1.57 and 1.60, you may choose based on your prescription, if your sphere is below +/-3.00, you may choose index 1.57, or you should choose index 1.60, and we have also polycarbonate progressive lens an trivex progressive lens.