Night
Vision
No
one can see as well at night as in the daytime. But as
we
get older
these differences increase.
A
SO-year-old driver may require at least twice
as
much light
to
see the same thing at night
as
a 20-year-old.
What you do
in
the
daytime can
also
affect your night vision. For example,
if
you
spend the day
in
bright sunshine you are wise to wear sunglasses.
Your eyes will have less trouble adjusting to night. But
if
you’re driving,
don’t wear sunglasses at night. They may cut down
on
glare from
headlamps, but
they
also make a lot
of
things invisible.
You can be temporarily blinded by approaching lights. It can take a
second or
two,
or
even
several seconds,
for
your eyes
to
readjust to the
dark. When you are faced with severe glare
(as
from
a
driver who doesn’t
lower the high beams,
or
a vehicle
with
misaimed headlamps), slow down
a little. Avoid staring directly into the approaching lights.
Keep your windshield and all the glass on your vehicle clean
--
inside and
out.
Glare at night is made much worse by dirt
on
the glass.
Even
the
inside
of
the glass can build
up
a
film
caused by dust.
Dirty
glass makes
lights dazzle and flash more than clean glass would, making the pupils
of
your
eyes contract repeatedly.
Remember that your headlamps light up
far
less
of
a
roadway
when
you
are
in
a
turn or curve. Keep your
cyes
moving; that way, it’s easier
to
pick
out dimly lighted objects. Just as your headlamps should be checked
regularly for proper aim,
so
should your eyes
be
examined regularly.
Some drivers suffer from night blindness
--
the
inability
to
see
in
dim
light
--
and aren’t even aware of
it.
To Next Page
Loading...
