Single Vision Lenses
Single Vision Lenses correct a SINGLE Viewing area, be it reading, distance, or intermediate (arms-length) viewing areas. The entire Lens is same power throughout it, and may correct either Myopia (near-sightedness), or Hyperopia (far-sightedness). Single Vision Lenses for reading or intermediate vision are convex, while Single Vision Lenses for distance correction are concave. In addition to correcting a single viewing area, a Single Vision Lens may also be ground to correct astigmatism as well.