Evaluation Of Vault And Clinical Outcomes In Recently Developed Large-Diameter Eyecryl Phakic Toric Iols

To evaluate the recently developed large-diameter models of Eyecryl posterior chamber phakic toric intraocular lenses (pIOL) in terms of vault and clinical outcomes, and to compare them with other smaller-diameter models.

University of Health Sciences, Basaksehir Cam and Sakura City Hospital, Istanbul, Turkey.

This retrospective, comparative study included patients who underwent toric pIOL implantation for the treatment of high myopia and astigmatism. Patients were categorized into two groups: large diameter (13.5 or 14 mm) as group 1 and smaller diameter (12, 12.50 or 13 mm) as group 2. The vault, visual acuity, manifest refraction, endothelial cell density (ECD), IOL rotation and intraocular pressures (IOP) were recorded at postoperative first month. The vault prediction error was calculated by subtracting the measured vault from the predicted vault at month 1. The mean prediction error (MPE) and mean absolute prediction error (MAPE) were calculated for each group.

Group 1 consisted of 25 eyes, whereas group 2 included 34 eyes. There was no significant difference between the two groups in terms of visual acuity, manifest refraction, ECD, IOP and IOL rotation. There were no significant differences in vault (609 ± 264 vs 582 ± 182 µm), MPE (126 ± 163 vs 155 ± 168 µm), or MAPE (231 ± 174 vs 200 ± 108 µm) between the group 1 and 2, respectively. However, the mean predicted vault was significantly higher (483 ± 32 vs 427 ± 63 µm, p<0.001) in Group 1. A vault greater than 750 microns was observed in 9 eyes (36%) in Group 1 and in 4 eyes (11.8%) in Group 2 (p=0.057).

The new large-diameter models demonstrated comparable visual and refractive outcomes to the smaller-diameter models. Actual vault and prediction errors also exhibited similarity, with an increased rate of high vault (above 750 microns) observed in the large-diameter group.