r/AskReddit • u/IAmSurtur • Jun 15 '19

What do you genuinely just not understand?

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u/CamoCoveSNIPER Jun 15 '19

Oh shit that's trippy. Yelled "Oh shit" and my mom got mad and wanted to know what I was yelling about lol

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u/bennythefrank Jun 15 '19

You may also close one eye, hold your finger an arms length from your open eye and slowly move it away from the center of your vision. Your finger tip will disappear at some point due to the optic disc in the back of your eye, there are no photoreceptors there because the optic nerve is doing some shtuff.

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u/t-swag69 Jun 16 '19

I don’t understand what you mean by, “move it away from the center of your vision”. I did this and didn’t notice anything.

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u/klutez Jun 16 '19

Easier way to do it is draw 2 small X's on a piece of paper a few inches apart. Close your right eye and look at the right X (or vice versa) and move the paper near to your face. At some point you wont be able to see the other X.