Originally Posted by JonStatt
Also blue misconvergence doesn't seem to matter anywhere near as much as green and red because our brains seem to pull in detail primarily from the green and red spectrum.
Originally Posted by Owen
The eye is most sensitive to green and red so green-red convergence is more important than green-blue or red-blue.
Human eyes have around 30 green and red receptors per 1 blue receptor in linear dimensions, 1 blue to several hundred green and red in area terms. Typically blue is out of focus in the eye by anything up to 1.5 diopter. Human vision 'in-fills' perception of blue.
For comparison if red and green are out of focus by 0.25 diopter or more you would probably benefit from glasses. Glasses are typically prescribed in 1/4 diopter increments, occasionally 1/8 diopter increments.
You also have the issue of chromatic abberation. Equal distant red/green objects and blue objects can not be simultaneously in focus on the retina due to the chromatic abberation introduced by the eyes lens. This is one possilble explaination for the phenomenon of warmer colors appearing nearer in depth to viewers than cooler colors when looking at a flat picure.
Virtually the entire incoming data to the eyes are immediately transformed into sets of local difference signals, within the retina prior to transmission along the optic nerve to the central cortex. These are created by a variety of concentric 2D groupings nested together. It is believed there are essentially four sizes of these concentric nested R.F.'s, with the surrounds of each effectively providing the centers of the next scale up
1) Highest resolution R.F.s involve the inhibition of individual R or G cone outputs by a ring of mixed (R+G) cone outputs.
2) Larger R.F.s are then known to be created via amacrine cells & diffuse bipolars from 2D groups of R, G or (R+G) .
3) The groups of R & G lead to lower resolution opponencies directly between R & G
4) The grouped Y outputs are believed to interact with the known very sparse B receptors which intercept a very out-of-focus blue incident light. This latter leads to a very low resolution B vs Y opponency