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Night
Vision
No
one
can
see as well at night as in the daytime. But as we get older these
differences increase. A 50-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 eyes 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.
Driving
in
the
Rain
Rain and wet roads can mean driving trouble. On a wet road
you
can’t
stop,
accelerate or turn as well because your tire-to-road traction isn’t as good as
on dry roads. And,
if
your tires don’t have much tread left,
you’ll
get even
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