Editing Corrective lens (section)

===Single vision===
[[File:Reading glasses.jpg|thumb|right|Typical pair of single vision glasses]]
Single vision lenses correct for only one distance. If they correct for far distance, the person must [[Accommodation (eye)|accommodate]] to see up close. If the person cannot accommodate, they may need a separate correction for near distances, or else use a multifocal lens (see below).

Reading glasses are single vision lenses designed for near work and include over the counter glasses.  They come in two main styles: full frames, in which the entire lens is made in the reading prescription, and half-eyes, style glasses that sit lower down on the [[human nose|nose]].<ref>{{cite web|url=http://www.allaboutvision.com/over40/readers.htm|title=Reading Glasses|work=Over 40|publisher=All about vision|access-date=2010-06-14}}</ref> Full frame readers must be removed to see distance clearly, while the distance can be clearly viewed over the top of half-eye readers.