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Subjective visual horizon and rod and frame tests on the three groups before (black bars) and after surgery (striped bars). The values represent the mean and the error bars; standard error of mean (SEM). The Bonferroni corrected significant level for between-groups comparisons is set to p < 0.025 (in bold), but for consistency reasons p < 0.05 is also presented as trends (unbolded). The Bonferroni corrected significant level for within-subjects comparisons is set to p < 0.05.
