Central vault (µm) result WTW group STS group modify group total eyes >200 & >650 poor 23% 24% 60% 34.9% 200-400 & 550-650 acceptable 57% 48% 27% 42.9% 400-550 ideal 20% 28% 13% 22.2%

Table 2: Displaying central vault height in each group.