Single vision lenses are prescribed if you need correction for one field of vision for distance.

Progressives are no-line multifocal lenses with up to three viewing areas for near-, mid- and distance vision, so you can see up close and far away with one pair of glasses.

Reading glasses are typically for those with presbyopia, the age-related eye condition that causes the eye's lens to become more rigid over the years, decreasing a person's near vision.