Fig. 17 Racquetball eyeguard testing for ASTM F803 (1983). These high-speed film frames, taken by Chauncey Morehouse on commission by the ASTM eye safety subcommittee in 1983 were the first proof of the mechanism of open eyeguard failure and were instrumental indeveloping the standard requirements for ASTM F803 for the racket sports.332 Left two frames: racquetball impact on lenseless open eyeguard at 100 mph. Eye contact demonstrated by adherence of paste, that was applied to eye of headform before impact, adhering to the rebounding ball. Right frame: racquetball impact on lensed polycarbonate eyeguard at 100 mph. despite extreme flattening of the ball, there was no contact of the ball or the protector with the eye of the headform. The increase in diameter of the ball on impact explains the mechanism of eye injury when the initial point of contact is adjacent to the orbit.