Reading Glasses +0.50 to +2.50 Power Diopter Full-rimmed Frame +Clear Lenses Non-polarizedOne size fits most, made for both men and women, and available in Square Frame, Rectangle Frame, Frameless Gold, Frameless Clear and Night vision.Flex-Focus Optic Science - Amazing new technology - ONE STRENGTH FOR EVEYONE. No more needing 1 for computer and another strength for reading. Auto focus technology works for 0.5 to 2.5 strength levels.Packaging - Please note that your glasses will come in the As seen on TV box as shownDifference in the styles - When ordering please note a couple differences in the styles. - Only the Round Frame has the spring hinge The Square frame, Night Vision and Frameless styles do not. - All Styles styles has the same Outo-Focus Auto Focus lens - All Styles have the glare protection for phone and computer monitors except the Night Vision