Drivers Ed 2

Topics: Eye, Visual perception, Visual system Pages: 3 (576 words) Published: February 18, 2013
Module 2 notes
When you are driving, most information comes to you through eyes. Gathering information with your eyes is called visual perception – the ability to notice many things at once. You must have 20/40 vision or better in each eye and both eyes If it is found that you have 20/200 (or poorer) vision in one eye, you must have 20/40 or better vision in the other eye with or without corrective lenses If it is found that you have 20/70 (or better) vision in either eye separately, or in both, the more impaired eye must test better than 20/200 with or without corrective lenses. Our eyes provide two types of vision:

Central vision- covers about three degrees of our visual field Peripheral or side vision, covers the rest
Peripheral vision is not as sharp as central vision, but it is more sensitive to light and motion. Three basic rules to follow when developing good eye habits for driving: * Aim high – look ahead, not down ‘

* Keep your eyes moving - Use lane lines to maintain proper lateral position * Get the big picture- select important clues that will direct you in maneuvering your vehicle. Colorblindness is lack of perceptual sensitivity to certain colors. People who are color blind have mutations in their genes that cause a loss of either red or green cones. There fore they have a hard time distinguishing between colors.

Red, green, and blue are the three type of cones in the human eye. Never wear dark glasses or sunglasses at night . tinted contact lenses can also make it hard to see, so avoid wearing them at night. Hearing is more important to driving than many people realize. Your hearing can warn you of potential danger- the sound of horns, a siren, or screeching tired . sometimes youll hear cars in your blind spots before you see them Not being tired on a long trip:

* Keep shifting your eyes form one part of the road to another Look at objects near and far, left and right
* Try chewing gum or singing along with the...
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