Difference between revisions of 20/20 correction
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'''''20/20 correction''''' is a correction you normally get from a licensed optician, which corrects your eyesight up to a degree of [[visual acuity]] that an [[emmetropic]] (or "normal-seeing") person achieves on a [[Snellen Chart]]. | '''''20/20 correction''''' is a correction you normally get from a licensed optician, which corrects your eyesight up to a degree of [[visual acuity]] that an [[emmetropic]] (or "normal-seeing") person achieves on a [[Snellen Chart]]. | ||
If you can see 20/15 or even better, this means that you are [[overcorrected]]. (It is not necessarily considered super-human acuity, but it is unnecessary to correct to this level.) | If you can see 20/15 or even better, this means that you are [[overcorrected]]. (It is not necessarily considered super-human acuity, but it is unnecessary to correct to this level. Also, 20/15 isn't always a good measurement, as [[User:User]] can sometimes see 20/15 with Normalized, and overcorrection makes 20/10 readable on a bright Snellen) | ||
It is very difficult to perform [[Active Focus]] at this level of correction, as there is not enough of a [[blur horizon]] to produce [[stimulus]] - see [[Distance vision]]. | It is very difficult to perform [[Active Focus]] at this level of correction, as there is not enough of a [[blur horizon]] to produce [[stimulus]] - see [[Distance vision]]. | ||