Figure 2. Changes in guinea pig body
weight and corneal thickness over 15 weeks. A: Average
(±standard deviation) body weight of guinea pigs fed a normal
(AA+) or ascorbic acid deficient deficient (AA-) diet, with
(UVB+) or without (-) daily UVB exposure. From week 9 onwards
body weight was significantly lower in the ascorbic acid
deficient animals (p<0.01). B: Average
(±standard deviation) corneal thickness measurements from the
same guinea pigs revealed a significant increase in corneal
thickness following UVB-exposure (p<0.01). Moving average
trend lines show the pattern of animal growth and corneal
thickness change during the course of the study.