Alterations in the anterior chamber angle after implantation of iris-fixated phakic intraocular lenses.
OBJECTIVE
To evaluate anterior chamber angle alterations after phakic intraocular lens (pIOL) implantation using the Pentacam rotating Scheimpflug camera (Oculus) and the effect on intraocular pressure (IOP) and anterior chamber inflammation.


METHODS
Department of Ophthalmology, Keio University School of Medicine, Tokyo, Japan.


METHODS
Twenty eyes of 11 patients with high myopia who had implantation of pIOLs (Artisan/Verisyse, model 204, Ophtec BV) were included. All pIOLs were fixated on the iris near the 3 o'clock and 9 o'clock positions. Angles at the 2, 3, 4, 8, 9, and 10 o'clock positions, IOP, and postoperative flare were evaluated retrospectively.


RESULTS
The mean angle degree at 2, 3, 4, 8, 9, and 10 o'clock was 40.3 degrees +/- 3.3 (SD) preoperatively and 36.5 +/- 5.8 degrees postoperatively; the postoperative angles were significantly narrower than the preoperative angles (P<.001). The mean angles at 3 o'clock and 9 o'clock were 39.8 +/- 3.7 degrees and 40.6 +/- 3.5 degrees, respectively, preoperatively and 32.7 +/- 6.0 degrees and 31.3 +/- 5.4 degrees, respectively, postoperatively. The postoperative angles at 3 o'clock and 9 o'clock were narrower than the preoperative angles (P<.001). There was no significant difference between preoperative IOP and postoperative IOP (P = .22). The flare at 1 month (r = 0.573, P = .0071) and 1 year (r = 0.700, P = .004) was significantly correlated with the angle change.


CONCLUSIONS
Partial localized narrowing of anterior chamber angles that occurred after pIOL implantation induced acute and chronic anterior chamber inflammation in patients with large angle alterations.
Yamaguchi
Takefumi
T
Department of Ophthalmology, Keio University School of Medicine, Tokyo, Japan.
Negishi
Kazuno
K
Yuki
Kenya
K
Saiki
Megumi
M
Nishimura
Ryo
R
Kawaguchi
Nanae
N
Tsubota
Kazuo
K
D000328:Adult; D000867:Anterior Chamber / Q000473:pathology*; D002924:Ciliary Body / Q000473:pathology*; D005260:Female; D006801:Humans; D007429:Intraocular Pressure; D007498:Iris / Q000601:surgery*; D019654:Lens Implantation, Intraocular; D008297:Male; D008875:Middle Aged; D009216:Myopia / Q000601:surgery; D054120:Phakic Intraocular Lenses; D010781:Photography; D012189:Retrospective Studies; D014792:Visual Acuity