1995 Cadillac Seville Owner's Manual - Page 211

Night Vision No one can see aswell 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 theday in bright sunshine you are wise to wear sunglasses. Your eyes will have lesstrouble adjusting to night. But if you're driving, don't wear sunglasses at night. They may cut down on glare from headlamps, butthey 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. Whenyou 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 approaching the lights. Keep your windshield and all the glass on your vehicle clean -- inside and out. Glare at nightis 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 thanclean glass would, making the pupils of your eyes contract repeatedly. Remember thatyour 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 properaim, so should your eyes beexamined regularly. Some drivers suffer from night blindness -- the inability to see in dim light -- and aren'teven aware of it. 4-20