Clinical Study
Eye advance online publication 10 July 2009; doi: 10.1038/eye.2009.170
Evaluation of pupil diameter after posterior chamber phakic intraocular lens implantation
K Kamiya1, K Shimizu1, A Igarashi1 and H Ishikawa2
- 1Department of Ophthalmology, University of Kitasato School of Medicine, Kanagawa, Japan
- 2School of Allied Health Sciences, University of Kitasato, Kanagawa, Japan
Correspondence: K Kamiya, Department of Ophthalmology, University of Kitasato School of Medicine, 1-15-1 Kitasato, Sagamihara, Kanagawa 228-8555, Japan Tel: +81 42 778 9012; Fax: +81 42 778 9920. E-mail: kamiyak-tky@umin.ac.jp
Received 30 December 2008; Revised 22 May 2009; Accepted 22 May 2009; Published online 10 July 2009.
Abstract
Purpose
To observe the changes of pupil size over time after Visian Implantable Collamer Lens (ICL) implantation.
Patients and methods
We retrospectively examined 30 eyes of 23 consecutive patients undergoing ICL implantation. We measured the entrance and real pupil diameters using a Hartmann–Shack aberrometer (KR-9000, Topcon, Tokyo, Japan) before and 1 day, 1 week, and 1, 3, 6, and 12 months after surgery. We also investigated its relationship with the amount of vaulting using slit-lamp microscopy 1 year postoperatively.
Results
The entrance pupil diameters were 6.24
0.66 (meanstandard deviation) mm preoperatively, and 5.530.69, 6.180.61, 6.210.80, 6.290.74, 6.230.76, and 6.400.70 mm, 1 day, 1 week, and 1, 3, 6, and 12 months postoperatively, respectively; and the respective real pupil diameters were 5.440.55 mm preoperatively, and 4.950.60, 5.530.52, 5.550.69, 5.630.64, 5.570.64, and 5.720.60 mm, 1 day, 1 week, and 1, 3, 6, and 12 months postoperatively. Pupil diameters and the amount of vaulting were not significantly associated (Pearson correlation coefficient r=0.14, P=0.45 for entrance pupil, r=0.13, P=0.49 for real pupil).
Conclusions
Both pupil diameters decreased transiently 1 day after ICL implantation, but soon recovered to the preoperative level, indicating that intraoperative mechanical irritation of the uveal tissue and the early postoperative inflammatory response may induce transient decreases in pupil diameter, and that this surgical technique alone with appropriate ICL size selection probably induces no significant pupil diameter change.
Keywords:
ICL, phakic IOL, pupil, vaulting
