Show Sees Kinship Between Vitamins and Vision o C The manner In which the eye works works particularly how tow It perceives what one knows as color Is a n ver very considerable erable m mystery The puzzle Is not very much clarified but is possibly possibly pos pos- sibly siLly made more Interesting by br the tho recent discovery that there Is a close relation between vitamin A and the of visual purple In the retina It has long been known that visual purple which plays an nu Important I part In the functioning of the retinal retinal re re- re- re rods Is sensitive e to light bleaching Blenching to a colorless material when exposed to Illumination Watching this phenomenon Dr George eorge Walt Wald at the thc Oceanographic Institute Woods Hole Mass dis dis- dis I. I I covered that when the purple be becomes becomes I Icom com comes s transparent a slightly yellow eIlo material Is split off oft from it This material a hitherto unknown chew chem cal leal was found to be closely relate to carotene which In turn Is a close relative of vitamin A. A Doctor Wald then actually witnessed witnessed wit wit- the transformation of the new yellow ellow substance into vitamin A. A A.- A. Literary Digest |