GMC 2003 Envoy - Manual (Page 262)

• Since you can't see as ^rtfetl, you may need to $Jow
down згк1 begp more space between you and
other vehicles.
■ Show down, especigJiy on higher speed roads Your
headlamps can light up only so much rogd ahead.
• If! remote areas, watch tor animals.
• It you'ne trredH pull cfl the road in a sale place
and rest.
Mo one can see as well at night as in Ihg d^ytimo.
But as W
0 get older these diflerences Increase.
A 50-year-old dnvgr may require at least twice as much
light to see the same thing at night as a iO-year-old.
What you do in the daytime can atso affect your
night vision. For exanriple, if you spend Ihe day in bright
sunshirie you are wise to wear sungiasses. Your
eyes
Will have less Iroubla adjusting to night. But it
you're driving, don't wear sunglasses al nighh "Rtey may
cut down on glare from headlamps, but they also
maite a lot oi things invisible.
You can be temporahiy blinded by approaching
headlamps. It can □ cccond or Iwa. 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 e vehicle with
misaimed headlampsK slow down a little. Avoid starir>g
dineclly into the approaching headlamps.
Keep your windshield and atl ihe glass on your vehicle
dean = inside and out Glare at nighi is made much '
worse by dirt on the glass. Even Ihe inscde of the glass
can buHd up a film caused by dust. Dirty glass makes
lights dazzle and flash mora than claan glass would,
making the pupils of your eyes contract repeatedly
Remember that your he adf a imps light up tar Teas of a
roadway when you are in a turn or curve. Keep your eyes
moving; that way. rt's easier to pick out dimly lighted
objects. Just as your headlamps should ina checked
regularly for proper aim, so should your eyes be
eKarmined regularly, Some drivers suiter from night
blindness — Ihe inability lo see in dim Nghi — and
aren't even aware of it.
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