c. can see objects clearly at 20 inches

d. can see clearly at 20 feet in right eye and left eye

5. Which of these computer users are more likely to have focusing problems?

a. first-time users

b. young adults

c. contact-lens wearers

d. people older than 50

6. Which of these will help reduce eyestrain when you work at a computer?

a. frequent blinking

b. shifting focus from near to far object

c. eliminating glare on the screen

d. all of the above

7. How often should adults age 18 to 50 have an eye exam?

a. every five years

b. every two years

c. annually

d. when you have difficulty seeing

8. Which of these vision problems do laser and non-laser refractive surgery correct?

a. nearsightedness

b. farsightedness