Figure 1. Changes in the refractive error
of treated and contralateral control eyes over ten days of
form-deprivation and negative-lens wear. The fitment of translucent
diffusers over the eye induced significant development of myopia over
the ten-day experimental period, as compared to control values (MANOVA;
F (1,10)=8.3, p<0.01). Chicks fitted with −10D lenses significantly
compensated for the lenses over the initial seven days of treatment
(MANOVA; F (1,7)=10.2, p<0.01), before plateauing. Although changes
in refraction of contralateral control eyes appeared different between
treatment groups, this behavior was not statistically significant over
time (MANOVA; F (1,10)=2.04, p=0.18). Error bars represent the standard
error of the mean (SEM), n=8 per time, per experimental treatment.