Table 1.

The questions that were used in pretest and the posttest

1. How well do you understand critical fusion frequency?
    a. Poor
    b. Fair
    c. Good
    d. Very good
    e. Excellent
2. An intermittently illuminated field appears to be continuously illuminated when:
    a. The frequency of interruptions is sufficiently low.
    b. The frequency of interruptions is sufficiently high.
    c. The field will never become continuously illuminated.
3. Which of the following statements is true?
    a. When the intensity of illumination of the light source increases, the CFF increases.
    b. When the intensity of illumination of the light source decreases, the CFF increases.
    c. Intensity of illumination of the light source does not affect CFF.
4. The CFF is:
    a. Lower in the peripheral retina than in the fovea.
    b. Higher in the peripheral retina than in the fovea.
    c. Equal in both peripheral retina and in the fovea.
5. Which of the following statements is true?
 a. Binocular CFF is higher than monocular CFF.
    b. Binocular CFF is always lower than monocular CFF.
    c. Binocular CFF is always equal to monocular CFF.
  • Question 1 was not used to calculate the scores. The correct response to each question is italicized.