Table 4.

The percentage of gas permeable (GP) contact lens and soft contact lens (SCL) wearers who reported the contact lenses were “always comfortable” or “usually comfortable,” subjective vision rating (%) and Ocular Pain subscale score from the National Eye Institute Visual Function Questionnaire at each visit for subjects wearing the originally assigned treatment for the entire study.

Visit	Always or usually comfortable (%)		Rating vision “pretty good” or “perfect” (%)		Ocular Pain subscale score
	GP	SCL	GP	SCL	GP	SCL
6 month	100.0	88.2*	100.0	90.2	83.8 ± 1.8	93.5 ± 1.6+
1 year	100.0	96.0	94.9	89.8	86.6 ± 1.8	92.9 ± 1.6+
18 month	91.9	87.8	100.0	90.0	87.1 ± 1.8	93.1 ± 1.6+
2 year	92.1	88.0	89.5	90.0	86.4 ± 1.8	92.9 ± 1.6+
30 month	89.3	100.0	92.9	94.9	88.0 ± 2.1	95.8 ± 1.8+
3 year	97.3	94.1	92.1	87.8	85.0 ± 1.8	94.6 ± 1.6+

^*Significant difference between GP and SCL group by Fisher’s Exact p < 0.05

⁺Significant difference between GP and SCL group by mixed linear model p < 0.05