Difference between revisions of 20/20 correction
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It is very difficult or impossible to perform [[Active Focus]] at this level of correction, as there is not enough of a [[blur horizon]] to produce [[stimulus]] - see [[Distance vision]], unless there is some sort of [[Guide:Reducing lens complexity|cylinder reduction]] or [[transient astigmatism]] involved. | It is very difficult or impossible to perform [[Active Focus]] at this level of correction, as there is not enough of a [[blur horizon]] to produce [[stimulus]] - see [[Distance vision]], unless there is some sort of [[Guide:Reducing lens complexity|cylinder reduction]] or [[transient astigmatism]] involved. | ||
A good [[normalized]] might be a further 0.25 D reduction from 20/20 correction, resulting in a 0.25 to 0.5 D undercorrection. | |||
==See also== | ==See also== | ||