Anterior vitreous detachment and retrolental material during cataract surgery: incidence and risk factors, with pathological evidence.

PURPOSE

To determine the incidence of anterior vitreous detachment (AVD) and retrolental material occurrence in cataract surgery, determine the influence of surgical factors on it, and confirm the source of the material.

SETTING

Affiliated Hospital of Nantong University, Jiangsu Province, China.

DESIGN

Prospective single-center study.

METHODS

Age, sex, ocular complication, nuclear sclerosis grade, ultrasonic time, mean longitudinal power, cumulative dissipated energy (CDE), total aspiration time, and estimated fluid usage were recorded for each patient. Retrolental anatomy was observed before and during surgery using real-time optical coherence tomography integrated into a microscope. The eyes with AVD were carefully observed and recorded during illumination with an optical fiber. Retrolental material was stained using immunohistochemistry.

RESULTS

205 eyes from 205 patients were included in this study. Spontaneous AVD was found in 5 cases. Intraoperatively, AVD was identified in 115 eyes (56.1%). Retrolental material presence was observed in 75 eyes (36.6%). A logistic regression model showed that CDE and aspiration time had a statistically significant effect on AVD ( P < .05, 95% CI, 1.011-1.558; P < .05, 95% CI, 1.026-1.051), and CDE was positively correlated with retrolental material occurrence ( P < .05, 95% CI, 1.052-1.534). Samples from 5 cases expressed large amounts of αA- and βA-crystallins.

CONCLUSIONS

Spontaneous AVD is rare in phakic eyes. There was a marked increase in AVD during surgery, with retrolental material occurring in more than a third of cases. Higher CDE and longer total aspiration time were risk factors for AVD. Immunohistochemistry revealed that most of the retrolental materials were lens fragments.