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Cameras, Lenses and Accessories: Discuss DOF for human eye (it is a lens of sorts, right?)...I was reading up about aperture on Wikipedia, and got to this point: "The f-number of the human eye varies ...
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Old 17-09-2007, 14:40   #1 (permalink)
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Question DOF for human eye (it is a lens of sorts, right?)

I was reading up about aperture on Wikipedia, and got to this point: "The f-number of the human eye varies from about f/8.3 in a very brightly lit place to about f/2.1 in the dark."

I had previously wondered about the variability of the human eye's DOF, and reading this reminds me. Does our eye's DOF change depending on the available light? Is there any specific setting/situation where this can be easily noticed?
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Old 17-09-2007, 15:16   #2 (permalink)
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Re: DOF for human eye (it is a lens of sorts, right?)

DoF is a function of aperture, so it will change as the iris dilates and contracts. I doubt if we notice this too much because we tend to focus on quite a small area and everything outside this is peripheral shapes without much definition.
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Old 17-09-2007, 17:48   #3 (permalink)
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Re: DOF for human eye (it is a lens of sorts, right?)

It s one to ask my consultant when I see him next not sure how that will work with the new lens they have fitted in my left eye { I did ask for a telephoto but he just gave me the look } should be getting the DVD of the operation soon they are trying to get it down to 2HRS frome the 3and a half it took should be cool may try to get some stills of it and enlarg them for my wall art
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Old 17-09-2007, 22:22   #4 (permalink)
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Re: DOF for human eye (it is a lens of sorts, right?)

I've often thought about this. You can notice the shallow DOF effects of your eye when looking at something close up better if you only use one eye. When looking at something far away your eye it seems to reach an 'infinity point' where almost everything past a certain point is in focus. Just like a lens. If that makes sense.


You can spend ages playing with your eye's aperture. Also try "looking" at the OOF bits when using one eye. Your brain can manage it a little before your eye refocuses. Fun
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