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. 2017 Apr 28;96(17):e6782. doi: 10.1097/MD.0000000000006782

Figure 4.

Figure 4

Graph demonstrating the refractive power (RP) of the cornea in eyes with myopic regression after laser in situ keratomileusis in the 2 treatment groups in different follow-up visits. Before treatment with eye drops (pretreatment), the difference in the mean RP was not statistically significant between the 2 groups (P = .913, independent samples t test). Three months after the twice-daily application of Timolol (during treatment), the mean RP decreased significantly in Group 1 (from 38.9 D pretreatment to 36.9 D during treatment, P = .018, n = 32, one-way ANOVA test) and gained 3.1 D lowered than the mean RP in Group 2 (P = .000, independent samples t test). Two months after cessation of Timolol treatment (posttreatment), the mean RP in Group 1 increased significantly (from 36.9 D during treatment to 38.7 D posttreatment, P = .036, n = 32, one-way ANOVA test) and returned to its own pretreatment level (38.9 D, P = .777, n = 32, one-way ANOVA test). The difference of the mean RP posttreatment between the 2 groups was not statistically significant (P = .069, independent samples t test). ANOVA = analysis of variance.