Difference between revisions of Blur
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A common description of spherical (myopic or hyperopic) blur is that it looks like [[wikipedia:Gaussian blur | Gaussian blur]]. | A common description of spherical (myopic or hyperopic) blur is that it looks like [[wikipedia:Gaussian blur | Gaussian blur]]. | ||
A good [[normalized]] creates some blur or double vision challenge for distant objects, but objects that are slightly closer are clear. A good [[differential]] creates some blur or double vision challenge near the ergonomic working distance. | A good [[normalized]] creates some blur or double vision challenge for distant objects, but objects that are slightly closer are clear. A good [[differential]] creates some blur or double vision challenge near the ergonomic working distance. They should be determined by calculating [[diopter]]s and [[cm]], but a normalized is typically 20/20 to 20/50, and a differential is typically 20/40 to 20/150. | ||
{| class="wikitable" style="text-align:center;" | |||
! Amount of blur | |||
! Visual Acuity | |||
|- | |||
| none | |||
| 20/5 to 20/15 | |||
|- | |||
| tiny | |||
| 20/15 | |||
|- | |||
| little | |||
| 20/20 | |||
|- | |||
| some | |||
| 20/25 | |||
|- | |||
| a lot | |||
| 20/50 | |||
|- | |||
| a huge amount | |||
| 20/300 | |||
|} | |||
==Myopic vs Hyperopic Blur== | ==Myopic vs Hyperopic Blur== | ||