Month: July 2022
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The Science Behind the Ishihara Test
Footnotes FOOTNOTE 1: CONE MOSAIC (5:07) The small changes in luminosity curve are often due to differences in the cone mosaic. The retina is made up of the four photoreceptors (3 cones and 1 rod), but these proportions change from person to person. Some people have more red cones and some more green cones, and…
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My least favourite traffic sign
Another short up this week. There is a traffic sign that means “give way to oncoming traffic” often seen on single-lane bridges that in europe looks similar to the sign pictured below. Since protans perceive red as darker, in many conditions, this sign can appear all black and therefore potentially be confused with a sign…