A single vision lens carries one prescription across the whole lens. It can be made for distance, for reading, or for a fixed working distance such as a computer.
It is the simplest lens type and suits anyone who needs correction at only one distance.
Frequently Asked Questions:
Q. Can single vision be used for computers?
A. Yes; a dedicated single-vision computer lens set to screen distance is very comfortable.
Q. Is single vision cheaper than progressive?
A. Generally yes, because the design is simpler.
Q. Can I use readers instead?
A. Over-the-counter readers work for mild presbyopia but ignore astigmatism and PD.