Effect of manual, preloaded, and automated preloaded injectors on corneal incision architecture after IOL implantation.

PURPOSE

To analyze the effects on corneal morphology of manual, preloaded, and automated preloaded intraocular lens (IOL) injectors in eye bank human corneas by environmental scanning electron microscopy (ESEM) and in patients after phacoemulsification using anterior segment optical coherence tomography (AS-OCT).

SETTINGS

Eye Clinic, Careggi University Hospital, Florence, Italy.

DESIGN

Retrospective and experimental study.

METHODS

Seventy-eight corneal incisions were examined after IOL implantation: 30 in human corneas mounted on an artificial chamber using ESEM (ex vivo); 48 in patients undergoing phacoemulsification (in vivo). Three different injectors were used for both analyses: manual (Monarch III, n = 26), manual preloaded (UltraSert, n = 26), and automated preloaded system (AutonoMe, n = 26). Thirty IOLs were implanted in the ex vivo study: 5 intermediate and 5 high dioptric powers for AcrySof IQ (Monarch and UltraSert) and for Clareon (AutonoMe) IOLs. In the in vivo analysis, 16 corneal wounds for each injector were evaluated using AS-OCT; in the ex vivo study, incision width was measured and Descemet membrane detachment, posterior wound retraction, and posterior gape were analyzed.

RESULTS

In the eye bank corneas, the incision width was significantly wider in the high dioptric power IOL manual subgroup (P < .05), with more Descemet tearing compared with AutonoMe. In the in vivo study, the incidence of Descemet membrane detachment, posterior gape, and wound retraction was lower in the automated preloaded group at 1 postoperative day 1.

CONCLUSIONS

The automated preloaded injector ensured less trauma to the wound and contributed to preserving the endothelial side of the incision even during the implantation of high-power IOLs and in the early postoperative period.