Abstract
The D-α-thioctic acid content of the eye of the frog (Rana nigromaculata) was determined quantitatively. Outer segments of rods, whole retinas, and choroids contained, respectively 2.0, 8.6, and 13.0 mµg of D-α-thioctic acid per milligram (dry weight). DL-a-Thioctic acid had no accelerating effect on the regeneration of rhodopsin in vivo.
