The following are true about dark adaptation:
a. only regeneration of rhodopsin is responsible
b. adaptation usually takes about 20 minutes
c. dilatation of pupil plays a part in dark adaptation
d. it is better with the fovea than the peripheral retina
a. only regeneration of rhodopsin is responsible
b. adaptation usually takes about 20 minutes
c. dilatation of pupil plays a part in dark adaptation
d. it is better with the fovea than the peripheral retina