Rotational Stability And Refractive Outcomes Of A Toric Phakic Intraocular Lens

 To evaluate the refractive results and rotational stability of a toric phakic intraocular lens (pIOL). 

Veni Vidi Eye Center and Uskudar University Department of Ophthalmology, Istanbul, Turkey.

All patients who had implantations of a toric phakic intraocular lens (pIOL) between January 2021 and January 2022 were enrolled to the retrospective study. Intraoperatively, pIOLs were aligned using the marks placed on corneal limbus preoperatively at slitlamp. Follow-up visits were done at the 1st day, the 1st week, and the 1st and the 3rd months post-operatively. At each visit, retroillumination images were taken to assess the pIOL toric axis orientations; visual acuities and refractions were also recorded.

38 eyes of 20 patients were included. At the 3rd month, SE was within ±0.50  D of emmetropia in 27 (71%) eyes and within ±1.00  D of emmetropia in 35 (92%) eyes. The mean value of absolute axis orientation error was 4.50 ± 5.00°. Mean absolute change in pIOL axis orientation between all visits was less than 3.50°. Ninety percent or more of the toric pIOLs were found to rotate 5° or less at every visit interval. None of the patients had experienced any vision-threatening complication, and no patient had required secondary pIOL repositioning. 

The pIOL appears to reduce the subjective manifest astigmatism effectively, and provide good visual acuity. The toric axises were stable throughout the follow-ups.