Ambient prism lenses (also known as conjugate prisms, yoked prisms, or performance lenses, transitional lenses or Kaplan lenses) are used to help improve ambient vision.
Ambient vision is the visual system related to spatial organisation. This includes posture, movement, as well as the perception of posture and movement.
Some people beleive that ambient lenses can be used to improve posture and co-ordination in children with autism who have problems with ambient vision.
This glossary is designed to explain some of the jargon and gobbledygook used by some people when they talk about autism or research..
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The fact that an intervention is listed in this glossary does not necessarily mean that we agree with its use. Nor does it necessarily mean that there is any scientifically valid or reliable evidence behind it.