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Comment by Liquidity | Hacker News Reader

When i could "see" my visual blindspot. https://lasikofnv.com/try-these-3-fun-tests-to-find-your-vis....

OMG me too. I was having an eye exam. The technician had a black field with a bunch of lines. Holding a rod with a white dot, and told to let them know when it disappeared.

I laughed, "Well that will only happen if you put it behind your back."

They laughed, "Everyone has an astigmatism where the nerves enter the eye. We are looking for that or any other issues."

I was so shocked when the dot disappeared.

Also happy to hear it was the normal blind spot.

There is one driving your car too. :)

Not if your mirrors are set correctly. Lean your head to the side window, set the mirror so that it just misses the tail end of your car. Position your head over the centre console, set the mirror. There is now approximately no blind spot. You can fine-tune by careful observation on a multi-lane highway as people pass/you pass others. Done correctly, there is no blind spot.

Upvoted but wanted to add that this also requires the right mirrors. If you try to tow some trailers with a vehicle that doesn't have tow mirrors, then you could have a blind spot, especially behind the trailer if it blocks your regular rear view mirror.

There are always blind spots. You covered a blind spot, but not all of them. Some of them are surprising.

https://www.wthr.com/article/news/investigations/13-investig...

Holy shit... anyone reading that doesn't understand, follow that link and follow along. That was... terrifying when you think of the ramifications. What's more interesting with glasses, my blindspot is larger than without my glasses.

Wow... just... mind blown. I always read about it, but never experienced it... wow...

somewhat related, I was so glad when I found out the reason behind a dim bulb that's just turned off appearing brighter when _you look away_.

The answer is in the density of rod cells (which are photon receptors of the eye that specialize in low-light) are concentrated on the outer edges of the retina. So if you look straight at a dim bulb - the photons hit the cone cells, which aren't sensitive enough, but if you look away, the photons hit the rod cells and you can see the bulb!

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