Vitamin A Administration and Dark Adaption of Second and Third Grade Children

by Maurice Raper Silk

Institution: North Texas State Teachers College
Year: 1940
Keywords: dark adaption; Vitamin A; children; Night vision.; Eye  – Adaptation.; Vitamin A  – Therapeutic use.
Record ID: 1578343
Full text PDF: http://digital.library.unt.edu/ark:/67531/metadc75605/


This study was formulated for the following purposes: (1) To determine if a learning factor is involved when repeated tests are made with a dark adaption instrument, (2) To determine if the dark adaption of a group of second and third grade children showing poor dark adaption can be improved by the daily administration of Haliver oil capsules, (3) To obtain a dark adaption curve for two hundred twenty-three grade children of Denton, Texas.