Download my pinhole specs
plans from
http://img158.imageshack.us/im
g158/9363/pinholespectaclesso4
.jpg
and print on thin cardboard to
create your own pair of
pinhole specs. Have fun with
pinholes even if you don't
have poor eyesight. Pinholes
can improve poor eyesight or
reduce the minimum focus
distance of someone with g
more

Download my pinhole specs
plans from
http://img158.imageshack.us/im
g158/9363/pinholespectaclesso4
.jpg
and print on thin cardboard to
create your own pair of
pinhole specs. Have fun with
pinholes even if you don't
have poor eyesight. Pinholes
can improve poor eyesight or
reduce the minimum focus
distance of someone with good
eyesight. With pinholes only
the central light rays pass
through the eye lens, these
are not bent by the eye lens
and so a clearer image is
projected onto the retina. In
this video pinhole specs were
used with a defocused camera
to simulate the before and
after effect of seeing with
pinholes.

Category Howto & DIY

Tags How, Make, Pin, Hole, Glasses, Spectacles, No, Lens, Improve, Eye, Sight