Page 17 - The Book Pi in eye

Pi in eye

The way we see this world influences our behavior, our thinking
and our well being. From the moment we get up and look for the
alarm clock to the time we retire at night, we depend on our eyes.
Reading newspapers, watching television, cooking, solving
crosswords and other activities at home require good vision. People
who drive to work need distance vision for looking at traffic signs,
intermediate vision for the dashboard of the car, and near vision to
read maps.

Figure 2.1 Demonstrating different needs for vision: near for
reading, intermediate for computer work, and far to distinguish trees.

At work we need intermediate vision for computers and iPads and
near vision for reading documents. The ubiquitous Blackberry and
iPhones bring out the importance of intermediate vision.
For the sports minded, vision becomes critical. Excellent
binocular vision with depth perception is a prerequisite for football,
baseball, or tennis. Swimming, hiking, cycling, and triathlon benefit
from eyes that can see well without glasses or contacts. For the

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