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Originally Posted by thedoc
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Originally Posted by peacegirl
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Originally Posted by Vivisectus
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When the brain forces a focusing of the light through the eyes, the lens obviously is moving or changing to make certain accommodations.
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Ok, so when you use the word "Focus" you mean "changing the lens in order to redirect light in such a way as to allow us to see a clear image"
Which i a rough and oversimplified way is the same as in optics.
But that is an inherently afferent process, and it does not work if you try to replace "focus" with that sentence in the book. |
It is not an inherently afferent process if the eyes see the actual object rather than a virtual image of the object. |
The eye/brain actually receive the reflected light from the actual object and interpret is as an image of the actual object, there is nothing virtual about it. Virtual is an image that is constructed from information that is sent from one location to another, such as the image on your computer screen. What looks like a page of text is actually just light being projected, based on the information that the computer receives from the internet. In most cases there is no actual page anywhere, unless you print it out with your printer, and this I do on occasion when I want to keep something for future reference.
FYI, I have not printed out any of your fathers book, reading it on screen is bad enough. |
Whether we see directly, in real time, or in delayed time, the brain still has to interpret what it sees. Constructing an image from light is not the same thing as seeing the real object. Maybe I shouldn't have used the word virtual. I'll give you that much.