To: exDemMom
“and typically opens and closes in response to various lighting conditions”
That would be the iris.
89 posted on
09/24/2016 6:30:29 AM PDT by
bk1000
(A clear conscience is a sure sign of a poor memory.)
To: bk1000
“and typically opens and closes in response to various lighting conditions” That would be the iris.
They work in tandem, since the pupil cannot open and close without the iris opening and closing it.
151 posted on
09/24/2016 2:14:47 PM PDT by
exDemMom
(Current visual of the hole the US continues to dig itself into: http://www.usdebtclock.org/)
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