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@alfie.harrison30 days ago
Why do humans have a blind spot in their vision?
I learned in class that everyone has a “blind spot” in their visual field, but I’m not sure why it exists. What’s the anatomical reason for this blind spot, and how does the brain compensate for it so we don’t notice it in daily life? Are there any situations where the blind spot becomes more noticeable?
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Replies (3)
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@ellaclark
The blind spot is where the optic nerve leaves the eye-there are no photoreceptors there, so we can’t see anything in that small area. The brain fills in the gap so we don’t usually notice it.
30 days ago
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@logan.b
You can actually find your blind spot with a simple test-cover one eye and focus on a point, then move another object into your peripheral vision until it disappears!
30 days ago
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@ellaclark
Other animals have blind spots too, but their eyes are often positioned differently, so it’s not always in the same place or as noticeable.
30 days ago