True statement about dark adaptation include:
a. the threshold for light intensity falls
b. it is biphasic
c. the initial adaptation is due to rod adaptation
d. the change in the light intensity threshold is usually around 100 folds
a. the threshold for light intensity falls
b. it is biphasic
c. the initial adaptation is due to rod adaptation
d. the change in the light intensity threshold is usually around 100 folds