Dial Adjustable Glasses Variable Focus For Reading Distance Vision Eyeglasses Adjustable Focus - These Flex Focus Adjustable Glasses allow you to easily adjust the focus Flex-focus Glasses - by turning the knob, the two sides of each lens can be slid relative to each other until the right focal length is reached. Lightweight Material - light in weight, easy to use, no burden on the bridge of the nose. Universal Design - suitable for most people, not only can be used as presbyopia glasses and reading glasses but also can be used for children to do experiments to stimulate children's desire to explore and seek knowledge. Versatile Usage - Whether you're reading, working on a computer, or enjoying outdoor activities Package include:1 x Glasses Note: 1. Due to the different monitor and lighting effect, the actual color of the item may be slightly different from the color shown on the pictures. 2. Please allow 1-3cm error due to manual measurement. (1 inch = 2.54 cm) Thanks for your support :)