Bifocal Reading Glasses: Regular clear lens or weak magnification on top for long distance. And strong magnification on bottom for reading. Suit for outdoor reading and distance viewing. No longer need to carry multiple pairs of glasses. Special Photochromic Design: Photochromic lenses are based on the intensity of sunlight and ultraviolet lights, darkening the clear lens (may not change obviously under weak lights). They are a good solution for people who hate constantly switching between their reading glasses and their shades. Skin Friendly Material: The bifocal sun reader is designed for comfortable daily wear with durable, lightweight frames. This casual frame and nose pads make it very comfortable to wear. Note: This is not sunglasses! This reading glasses outdoors when the ultraviolet light is strong, the color change is deep. On the contrary, the weaker the ultraviolet light, the lighter the color change. Responsible Service: In case of any issue, we will provide support for you. We will offer solutions until the customer is satisfied. You have no need to worry about any trial period! Brand YEIN Color 8082 Amber Gray Arm Length 142 Millimeters Frame Type Full Rim Item Shape Square Lens Width 52 Millimeters Style Name 0.75/ 3.25 Unit Count 1.00 Count Frame Width 140 Millimeters Bridge Width 18 Millimeters Manufacturer YEIN Optical Power 3.25 Diopters Item Type Name Reading Glasses Lens Material Type Resin Frame Material Type Plastic Age Range Description Adult