272 exam mcqs - Study guides, Class notes & Summaries

1. During dark adaptation measured with a 1 degree red (700 nm wavelength) field, the switch from cone to rod vision occurs at approximately: a. 1-2 seconds b. 7-10 minutes c. 7-10 seconds d. 1-2 minutes e. There is no switch (only one curve is present) correct answerse. There is no switch (only one curve is present) 2. Which of the following statements regarding a 6/24 Snellen letter is correct? a. It is equivalent to a spatial frequency of 60 cycles/degree b. It is twice the size of...