[Prev][Next][Index][Thread]
(meteorobs) Visual Acuity
Hello to List Members:
After viewing a PBS special I thought I might pass on some
information that I've discovered recently. Visual acuity is very
definitely associated with the number of rods & cones that are in
each eye. A larger number of rods allows a human (or animal) to see
very well at night (ask your cat about night vision). The number of
cones in each eye provide definition to what we see (and talk to
your dog about this) - such that we all might perceive a different
number of lines and also to define colors. Each of us are provided
with a set of rods & cones (in each eye) at birth: certain genetic,
environmental and growth factors will affect how our eyesight
develops (or deteriorates) in our life. Not that I'm a doctor in the
field, but I can understand how two people can see differently in the
same viewing location - maybe we should depend on an independent
source of viewers (such as telescopic cameras) to determine what the
actual LM is for a given site.
I'm still looking at the skies with the naked eye because I LIKE it
that way (too bad my cat can't help me). Hope you all have clear
skies (and eye drops), warm weather, and no buzzworms or pissed off
sheep to bother you.
Bob Shumaker