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. 2015 Autumn;4(3):109–113.

Table 3.

Distribution of the Groups, Based on the Nelson Grading System

Grading H Lenses
(n=40)
RGP Lenses (n=18) SiH Lenses
(n=32)
Control
(n=2)
Grade 0 21 (52.5%) 9 (50.0%) 13 (40.6%) 14 (66.7%)
Grade 1 14 (35 %) 6 (33.3%) 13 (40.6%) 7 (33.3%)
Grade 2 5 (12.5%) 3 (16.7%) 6 (18.8%) 0 ( 0%)
P.value 0.445

H; hydrogel, n= number of eyes, RGP; rigid gas permeable, SiH; silicone hydrogel,