Bifocal lenses are prescribed if you need correction for both distance and near vision. Trifocals provide correction for three fields of vision, including distance, near and intermediate, all in one lens. When more than one field of vision requires correction, these types of lenses are called "multi-focals."

For more natural vision there are progressive lenses. This lens offers a smooth transition from distance to intermediate to near without any visual jumps or tell-tale lines. Progressives also look great on your face, since no one can tell you are wearing multi-focal lenses.