Influence of across-pupil sutures on the optical quality of intraocular lenses.
OBJECTIVE
In cases of pupillary capture after previous transscleral fixation of an intraocular lens (IOL), an across-pupil suture technique is sometimes used to stabilize the IOL. We investigated the optical effects of 10-0 polypropylene sutures placed across the pupil.


METHODS
Optical performance was evaluated using the optical bench metrology system, and a single-piece IOL was used in an optical bench system consisting of a model eye, a high-resolution Hartmann-Shack wave front sensor, and an image capturing device with 2.0, 3.0, 4.0, and 4.5 mm apertures with distance focus. To simulate across-pupil sutures, two 10-0 polypropylene sutures were placed 2 mm apart across the pupil. The focus image, spherical aberration, and image quality were measured and compared with and without sutures.


RESULTS
When pupil size increased, spherical aberration increased, irrespective of sutures. No difference was found in spherical aberration with and without sutures, and image qualities at 17.6 and 35.2 cycles per degree were not affected by the across-pupil sutures.


CONCLUSIONS
The differences in optical quality using across-pupil 10-0 polypropylene sutures were clinically negligible.
Department of Ophthalmology and Visual Science, Daejeon St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea.|Department of Ophthalmology and Visual Science, Catholic Institute for Visual Science, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea.
Chang Rae
CR
Rho
Department of Ophthalmology and Visual Science, Catholic Institute for Visual Science, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea.|Department of Ophthalmology and Visual Science, Seoul St. Mary's Hospital, College of Medicine, The Catholic University of Korea, 222 Banpo-daero, Seocho-gu, Seoul, 137-701, Republic of Korea.
Min-Ji
MJ
Kim
Department of Ophthalmology and Visual Science, Catholic Institute for Visual Science, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea. ckjoo@catholic.ac.kr.|Department of Ophthalmology and Visual Science, Seoul St. Mary's Hospital, College of Medicine, The Catholic University of Korea, 222 Banpo-daero, Seocho-gu, Seoul, 137-701, Republic of Korea. ckjoo@catholic.ac.kr.
Choun-Ki
CK
Joo
D003198:Computer Simulation; D006801:Humans; D019654:Lens Implantation, Intraocular / Q000379:methods*; D007910:Lenses, Intraocular; D055095:Optics and Photonics; D011474:Prosthesis Design; D011680:Pupil; D013536:Suture Techniques / Q000295:instrumentation*; D013537:Sutures; D014792:Visual Acuity
Across-pupil suture; IOL dislocation; Optical bench; Spherical aberration