A diminishing pupil diameter with age is the trend, although by no means does it happen to absolutely everyone- thus the need for the gauge. There is no substitute for good genes! I'm glad you brought up lasik. Astronomers should consider the procedure carefully, since there have been cases where night-vision has been affected on idividuals with pupils opening to just over 5mm. I imagine much of this is due to individual variations in eye dimensions, perhaps also related to the skill of the opthamologist. Isn't the latest variation computer-controlled? If it helps, Rich, think of it this way: The older you get, the more efficient your eyes get, so the fewer photons you need to achieve the same level of sensitivity... ;o) --- Richard Tenney <retenney@yahoo.com> wrote:
I used to work with a young woman who had large, rather attractive eyes, who told me she had to wait to get lasik surgery because her pupils fully dialated were over 9mm (early lasers apparently could not cover that much area). Talk about jealous! Last time I measured mine a few years ago (Mark Dakins had a cardboard gauge) I was about 5.5mm. Isn't it true that as you age it tends to get smaller over time?
--- Chuck Hards <chuckhards@yahoo.com> wrote:
Thanks, Patrick.
It should be straightforward to make one, either by laying it out by hand, or printing one using the computer. In either case, one must take care to punch the pinholes at precisely the correct spacing. The more precise the gauge, the more accurately one can judge their pupil diameter.
If you find yours at SPOC, perhaps you can scan it?
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