Effect of moderate exercise on the ocular tension.

A few studies on the effects of hard or prolonged exercise on the ocular tension have reported a fall, except for the immediate rise which occurs on contraction of the abdominal and thoracic muscles (Comberg and Stoewer, 1925) or on the performance of the Valsalva manoeuvre (Biro and Botar, I962). Short (iOO m.) and middle distance (i,ooo m.) running was associated with a fall, greater with the longer distance (Biro and Botar, I962).