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Single vision prescriptions are the most common among people who need vision correction. It means the lenses are correcting for one field of vision such as nearsightedness, farsightedness and astigmatisms. The entire lens contains the same amount of vision correction.

Progressive lenses have three prescriptions in one pair of glasses. That allows you to do close-up work (like reading a book), middle-distance work (like checking out a website on a computer), or distance viewing (like driving) without needing to change your glasses.

• ADD (Addition) is needed. Please know without ADD on your prescription we will not be able to process your order.

Highly recommended for those using computers and other electronic devices daily to relieve eye fatigue. Having a light brown/yellow basis with a blue purple color reflected coating and 100% UV protection coating. The blue-light blocking lenses can effectively block 400nm to 455nm harmful blue-light from computer, phone, iPad, etc.

Eyeglass lenses for driving provide 100% UV blockage, comfortable anti-glare protection, sharper vision at night and safer driving along with better color and contrast perception, helping remove glare off the road and car hood for a picture-perfect drive.

Tint is the permanent colors added to your lenses, making your eyeglasses a pair of prescription sunglasses. Please note that the light tint is not dark enough to be sunglasses

Clear indoor, darkens when exposed to sunlight. Come with anti-reflective coating and 100% UV protection coating. May not darken inside a car or near windows since most windshields / windows block UV rays needed to darken the lenses.

Polarized lenses contain layers of special filter which will block intense reflected light and terminate the harmful glare from a horizontal orientation. With those polarized layers, light will be filter into one direction so that we will be offered better vision in a higher contrast. Come with anti-reflective coating and 100% UV protection coating. Polarized lenses definitely are your best company when enjoying your life outdoors, enhancing experiences of boating, skating, skiing mountain biking and driving.

Pupillary distance (PD) measures the distance between the centers of your pupils. This measurement is used to determine where you look through the lens of your glasses and should be as accurate as possible. The average adult's PD is between 54-74 mm; kids' are between 43-58 mm.

• PD can be measured using a mobile app on your phone or table.

                                         Download - PD Measurer