Abstract
The following conclusions have been made on the effects of six drugs on cone and rod dark adaptation:
(a) There is some improvement in cone dark adaptation after oral administration of NAA. (250-500mg.) and SN. (3.5-5mg.).
(b) There is some improvement in rod dark, adaptation after oral administration of NAA. (250mg.-500mg.), AH.. (3.5-5mg.), PH. (10-12mg.) and VC. (200mg.), (arranged in order of duration and strength of effect).
(c)- There is no improvement in either cone or rod dark adaptation after oral administration of NA. intake (250-500mg.).
