[mythtv-users] OT: colorblindness

[Robin Neatherway]

>  > And, is it just me, or do blocks of primary red and primary green
>  > (#ff0000, #00ff00) placed side-by-side, "Glow" at the join? It's like
>  > a kind of ringing effect, or halo, on both sides of the join, and it
>  > hurts.
>
>  I see that with red and blue, especially on monitors. It produces a kind
>  of 3d effect for me, where it seems like one of the colours is slightly
>  behind the other.

This effect is usually caused by the different wavelengths converging
differently on the retina. It is used by opticians to tell whether
your current sight (whether corrected or uncorrected) is either long
or short-sighted. It can be used to converge on a solution by applying
steadily smaller and opposing lenses.