Questions about simulating the human eye with regards to lens flare

loccdor · 2026-02-27T06:24:54-0500

1) Would the "milkiness", veiling flare and low contrast of an uncoated 1920s lens, or the clinical high contrast of a newer Fuji lens, more closely approximate the human eye?

2) What role do our eyelashes play and what would happen if you attached a step-up filter with a bunch of glued-on strings arranged like our eyelashes are? I think if the eyes are almost closed the lashes almost take the role of a cross-screen filter.

3) The eyelid and squinting are like an aperture, but it's a horizontal rather than circular aperture. The iris is a circular aperture. Both of these work together. Or is it better to think of the eyelid as a hood which sometimes vignettes?

Alan Edward Klein · 2026-02-27T07:55:14-0500

Cataracts, common as we age, cause glare as it clouds the eye lenses and scatters light.

Tel · 2026-02-27T09:01:37-0500

Alan Edward Klein said:
Cataracts, common as we age, cause glare as it clouds the eye lenses and scatters light.

My eye doctor, who understands photography, once told me that as my cataracts grew my lenses were being converted to pinholes, and that was the only reason I could still focus on anything. That got my attention and we scheduled the cataract surgery.

BrianShaw · 2026-02-27T09:23:40-0500

loccdor said:
1) Would the "milkiness", veiling flare and low contrast of an uncoated 1920s lens, or the clinical high contrast of a newer Fuji lens, more closely approximate the human eye?

2) What role do our eyelashes play and what would happen if you attached a step-up filter with a bunch of glued-on strings arranged like our eyelashes are? I think if the eyes are almost closed the lashes almost take the role of a cross-screen filter.

3) The eyelid and squinting are like an aperture, but it's a horizontal rather than circular aperture. The iris is a circular aperture. Both of these work together. Or is it better to think of the eyelid as a hood which sometimes vignettes?

D. None of the above.

Saganich · 2026-02-27T09:31:24-0500

I believe the eye flares, blooms and glares same as a camera lens because it's due to the properties of light. The difference is we have brains that compensate for the distortions.

pentaxuser · 2026-02-27T10:16:19-0500

locdor, I doubt if any of us on Photrio or even your friendly neighbourhood Opthalmologist will know the answers but on the other hand I may be wrong. You could always try the bunch of glued on strings as suggested by yourself in bullet point 2

I am not sure what the answers will do for your photography in terms of practical applications but you may be asking the questions for the purpose of knowledge for its own sake- a perfectly admirable objective

pentaxuser

Questions about simulating the human eye with regards to lens flare

loccdor

Alan Edward Klein

Tel

BrianShaw

Saganich

pentaxuser

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