Lens Types are the vision correction style in the lens.

• Single Vision lenses have one Rx power throughout the entire lens
• Progressive (no-line bifocal) lenses have distance at the top, and gradually increase in power moving down the lens to provide intermediate and reading vision
• Lined Bifocals have two corrections, usually distance/reading, but sometimes computer/reading or distance/intermediate
• Lined Trifocals have distance on the top, then two lined sections, the top for intermediate, and the bottom for reading