With the purchase of a frame, single lenses are free. No-line bifocal lenses are an extra cost (often approximately $80). Other lens options include plain colored glasses for around $40, polarizing lenses for around $50, and transition lenses for around $65. Frames can be purchased anywhere frames are sold. Transition lenses are special multi-focal lenses that allow you to see both far and near objects without changing your eye glass. They are available in different designs and colors and can be easily attached or replaced if they get scratched or damaged. Transition lenses are useful for people who need to take care of property or spend most of their time working on a computer screen. They provide full vision without having to change lenses as often. Transition lenses usually cost more than no-line bifocals because they are made of stronger materials for outdoor use and sports. However, they are still affordable compared to other types of lenses that give you full vision without obstructions. Walmart offers a wide selection of frames and lenses at low prices. For example, a pair of polarized sunglasses costs about $60 there. You can also find discounted frames every Thursday in the Adopt a Lens program.