Comparison of vault after implantation of posterior chamber phakic intraocular lens with and without a central hole

PURPOSE: To compare the vault after implantation of a posterior chamber phakic intraocular lens (pIOL) (Visian Implantable Co !lamer Lens) with and without a central artificial hole for moderate to high ametropia. SETTING: Department of Ophthalmology, Kitasato University, Kanagawa, Japan. DESIGN: Retrospective comparative study. METHODS: The study comprised eyes of patients who had central hole plOL implantation in 1 eye and conventional plOL implantation in the fellow eye. The time course of the postoperative plOL vault was quantitatively assessed using a rotating Scheimpflug camera (Pentacam HR). RESULTS: Twenty-three patients (46 eyes) (mean age 31.3 years +/- 7.4 [SD]) were enrolled in the study. The amount of vault with the central hole plOL was 603 +/- 276 p.m, 552 +/- 261 Jim, 539 +/- 258 mu M, 520 +/- 240 Jim, and 482 +/- 245 mu m, at 1 week, 1 month, 3 months, 6 months, and 1 year postoperatively, respectively. The amount with the conventional plOL vault was 585 +/- 252 mu m, 550 +/- 269 p.m, 514 +/- 253 jim, 485 +/- 233 gm, and 459 +/- 239 mu M, respectively. There was no significant association between the plOL vault and the refractive accuracy 1 year postoperatively (Spearman correlation coefficient r = 0.18, P = 0.41 for central hole plOL and r = 0.07, P =.76 for conventional plOL). CONCLUSIONS: The vault of the new central hole plOL appeared to be essentially equivalent to the vault of the conventional plOL, suggesting that the presence of the central hole did not significantly affect the vault or the refractive accuracy.