To assess changes in the posterior vitreous caused directly by phacoemulsification with implantation of an intraocular lens, using the enhanced vitreous swept-source optical coherence tomography system (Topcon, Tokyo, Japan).
Consecutive patients with cataract without posterior vitreous detachment were enrolled. Swept-source optical coherence tomography examinations were performed 1 day before and several days after surgery, using enhanced vitreous visualization. We compared preoperative and postoperative posterior vitreous status and measured the distance between the internal limiting membrane and the posterior vitreous membrane at 26 locations at the posterior pole.
Images of 33 eyes (21 patients) could be analyzed. The perifoveal posterior vitreous detachment was not extended in any eyes, and the internal limiting membrane to posterior vitreous membrane distance before and after surgery did not differ at any location measured (P = 0.071–1.000). The posterior precortical vitreous pocket was dilated in three eyes. Age, gender, axial length, preoperative visual activity, nuclear sclerosis, duration of surgery, and duration between surgery and swept-source optical coherence tomography did not differ between the dilated vitreous pocket group (n = 3) and the unchanged group (n = 30).
The height of the posterior vitreous membrane remained unchanged after surgery, although the posterior precortical vitreous pocket was dilated in three patients. Cataract surgery procedures seem to have little influence on the posterior vitreous membrane.
The study assessed changes of the posterior vitreous immediately after phacoemulsification and implantation of a posterior chamber intraocular lens, using enhanced vitreous swept-source optical coherence tomography. The posterior vitreous height did not change after surgery, although there was a dilation of the posterior precortical vitreous pocket in three patients.
Department of Ophthalmology and Visual Sciences, Kyoto University Graduate School of Medicine, Kyoto, Japan.
Reprint requests: Sotaro Ooto, MD, Department of Ophthalmology and Visual Sciences, Kyoto University Graduate School of Medicine, 54 Shogoin Kawahara-cho, Sakyo-ku, Kyoto 606-8507, Japan; e-mail: firstname.lastname@example.org
Supported in part by the Japan Society for the Promotion of Science, Tokyo, Japan (Grant-in-Aid for Scientific Research, No. 26893131).
N. Yoshimura is a paid advisory board member for NIDEK; he has received lecture fees and research funding from NIDEK CO., LTD, Topcon, and Canon. The remaining authors report no conflict of interest.