184 



SUBJECT INDEX 



Visual acuity, 30, 93, 94, 104-107, 



Visual cells (see cones and rods) 

 Visual purple (see rhodopsin) 

 Visual thresholds, 143 

 Visual violet (see iodopsin) 



Visual yellow (see retinine) 

 Vitamin A, 122, 124-128, 130, 133- 

 136, 140-152, 158, 159 



deficiency. 130, 132, 133, 142-159 



storage of, 149 



therapy, 146-159 



