Five-year follow-up of a posterior chamber phakic intraocular lens with a central hole for correction of myopia.

However, comparing pre to postop SE shows a highly significant difference as expected ( p < 0.001).

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There was a decrease in UDVA over time (3–5 years, p = 0.017), but using a Bonferroni corrected p value (0.12) this was not statistically significant. The same does account for the postoperative mean spherical equivalent that improved to − 0.05D ± 0.44 at 1-month postoperative and did have a slight trend toward myopization during the 5 years of follow-up ( − 0.15D ± 0.52 at 3 and − 0.45D ± 0.69, Table 1 , Fig. 1 ) but did not change significantly over time when using a Bonferroni corrected p value (0.266).

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