Why Can I See Inside a Cylinder with One Eye Closed?

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Discussion Overview

The discussion revolves around the phenomenon of visual perception when one eye is closed while looking through a cylinder, such as a cup. Participants explore the mechanics of vision, brain processing, and the effects of occlusion on visual input.

Discussion Character

  • Exploratory, Conceptual clarification, Debate/contested

Main Points Raised

  • One participant questions why they can see inside a cup when one eye is closed, seeking an explanation for the brain's control over visual perception.
  • Another participant claims they can see equally well out of both eyes when looking through a cup, suggesting a different experience.
  • A third participant raises the issue of the cup's opacity, indicating that the visibility of details may depend on whether the cup blocks light.
  • One participant explains that when one eye is covered, the brain compensates for the lack of input from that eye by filling in the visual information based on available data.

Areas of Agreement / Disagreement

Participants express differing experiences regarding visibility when one eye is closed, indicating that there is no consensus on the phenomenon being discussed.

Contextual Notes

Some assumptions about the opacity of the cup and the conditions under which participants are observing may not be fully addressed, leading to varying interpretations of the visual experience.

gabe1scott
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This may be a dumb question but I am curious about it and want to know if anyone can provide me a link or give an explanation to why this is.

If I have a cylinder say like a cup and I put it over one eye I can only see the surroundings with my other eye that is not covered but if I close that eye than I can see inside the cup. Why is this? How does our brain decide which eye has more control over what we see. Why don't I see inside the cup instead?
 
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Erm, I can see both. I just put a cup to my right eye and stared straight forward, I could see equally well out of both eyes.
 
was the cup opaque though? I am not talking about a see through cup. If the cup surrounding the eye makes it dark where details are barely visible at least in my vision all I see is what my other eye focuses on.
 
Ah I see, my cup wasn't opaque but light was coming through the gap. When we cover one eye the photoreceptor cells at the back of the eye no long activate. Rather than show some vision and some blankness the brain fills in the vision with what it has.
 
okay thanks for the answer
 

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