The stenopaeic slit is a black disk with a thin slit through it used by optometrists in detecting the level of an astigmatism. [1]
The disk is rotated so that the slit is oriented at different angles, changing the retinal blur size. The stenopaeic slit is more useful to screen for a high degree of astigmatism in patients who have poor vision.
References
 | This article related to medical equipment is a stub. You can help Wikipedia by expanding it. |
The stenopaeic slit is a black disk with a thin slit through it used by optometrists in detecting the level of an astigmatism. [1]
The disk is rotated so that the slit is oriented at different angles, changing the retinal blur size. The stenopaeic slit is more useful to screen for a high degree of astigmatism in patients who have poor vision.
References
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| This article related to medical equipment is a stub. You can help Wikipedia by expanding it. |