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Randomcheeseslices t1_iucwu8r wrote

Reply to comment by bugi_ in ELI5: Why are the colours in rainbows in separate lines? by Oheligud

The brain fills in all kinds of information. Not just colours.

For instance, our eyes have multiple blindspots. But the brain fills in the details - by making em up.

Want to test that? Hold both your thumbs straight out. Look at the left one. Slowly move your right one to the right. And OMG did it disappear? Surely not? No, thats the blindspot where the optic nerve meets your eye.

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foersom t1_iud61j0 wrote

I tried, the right one never disappeared.

A better test. With both eyes open you do not see your nose. Close one of your eyes and you nose appear.

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Martin_RB t1_iufkawc wrote

Then congrats you are the first of your kind biological anomaly and researchers would love to dissect your eye...or you did it wrong.

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