🚀 go-pugleaf

bunner@vms.macc.wisc.edu (Dana A. Bunner) writes:
>In looking a little further into this eye pupil size question, I found several
>references which stated the maximum aperture for a human eye to be in excess
>of 7mm, a few stated 8mm and one said a few humans have been measured at 9mm.
>Two said the average was not 7mm but rather between 7.25 - 7.50 mm (for
>people under 30 years old).  Did your chart list any entries above 7mm?

The chart in the article which comes with the S&T pupil gauge kit is
taken from a study by I.E. Loewenfeld published in "Night Vision",
National Academy Press, 1987.  It was based on measurements of over
1200 people.  It is hard to estimate actual frequencies from the
chart (guesses based on density of dots representing individuals), but
at age 15, it seems that perhaps 10% have pupils between 8 & 8.7mm,
with the average being perhaps 7.25mm, and the bottom 10% falling
between 5 & 5.5mm.  There is a nearly linear decline in pupil size to
age 45, after which the decline levels out.  At age 45, the top 10%
fall between about 6.8 and 7.1mm, the bottom 10% between 3.2 and 4.2,
and the average being about 5.6.

briscoe@alumni.caltech.edu