## Table 3 |
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Visual acuity results |
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Phacotrabeculectomy |
Phacocanaloplasty |
P value^{‡} |
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n |
BCVA (logMAR) |
P value^{†} |
n |
BCVA (logMAR) |
P value^{†} |
||

Baseline | 20 | 0.71 ± 0.87 | 19 | 0.48 ± 0.39 | .835 ^{a} |
||

Postoperative | |||||||

1 day | 20 | 1.32 ± 0.95 | <.0001 ^{b} |
17* | 1.17 ± 1.00 | <.0001 ^{b} |
.537 ^{a} |

7 days | 20 | 1.14 ± 1.00 | <.0001 ^{b} |
17* | 0.78 ± 0.46 | <.0001 ^{b} |
.729 ^{a} |

4 weeks | 20 | 1.02 ± 0.93 | <.0001 ^{b} |
17* | 0.38 ± 0.37 | <.0001 ^{b} |
.004 ^{a} |

3 months | 20 | 0.56 ± 0.66 | <.0001 ^{b} |
17* | 0.28 ± 0.33 | <.0001 ^{b} |
.104 ^{a} |

6 months | 20 | 0.40 ± 0.69 | <.0001 ^{b} |
17* | 0.27 ± 0.39 | <.0001 ^{b} |
.821^{a} |

12 months | 19^{~} |
0.43 ± 0.69 | <.0001 ^{b} |
15^{+} |
0.29 ± 0.33 | .001 ^{b} |
.607 ^{a} |

Values are means ± SD (standard deviation).

*n* sample size, *BCVA* best corrected visual acuity, *logMAR* log of the minimum angle of resolution.

^{†} versus baseline; ^{‡} phacotrabeculectomy versus phacocanaloplasty.

* Two patients developed filtering blebs after canaloplasty and were therefore excluded.

^{+} Two patients needed cyclodestruction to reach target IOP and were therefore excluded.

^{~} One patient underwent cyclophotocoagulation to lower IOP and was therefore excluded.

^{a} Mann–Whitney *U*-test for independent samples without normal distribution.

^{b} Wilcoxon signed-rank test for dependent samples without normal distribution.

Matlach * et al.*

Matlach * et al.* *BMC Ophthalmology* 2013 **13**:1 doi:10.1186/1471-2415-13-1