vernier acuity การใช้

Vernier acuity measures the ability to align two line segments.
Vernier acuity and stereoacuity are cited as being detected with only a 2 4 arc second degree of separation.
Vernier acuity is resistant to defocus, motion, and luminance, but is subject to practice effects and changes in attention.
Also, there is the issue of vernier acuity, which is the eye s ability to detect an offset between 2 lines and stereoacuity, which is the ability to discriminate depth by the use of both eyes.
Because the limit of vernier acuity is well below that imposed on regular visual acuity by the " retinal grain " or size of the foveal cones, it is thought to be a process of the visual cortex rather than the retina.