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Rotational stability of 2 intraocular lenses with an identical design and different materials
Petra Draschl1, Nino Hirnschall1, Nikolaus Luft1
1From the Vienna Institute for Research in Ocular Surgery (Draschl, Hirnschall, Luft, Schuschitz, Wiesinger, Rigal, Findl), A Karl Landsteiner Institute, Hanusch Hospital, Vienna, Austria; Moorfields Eye Hospital (Findl), NHS Foundation Trust, London, United Kingdom.
Purpose:
To evaluate the rotational stability of nontoric intraocular lenses (IOLs) of the same design and different materials.
Setting:
Vienna Institute for Research in Ocular Surgery, Department of Ophthalmology, Hanusch Hospital, Vienna, Austria.
Design:
Prospective randomized case series.
Methods:
This study included cataract patients with a corneal astigmatism of less than 1.75 diopters measured with the IOLMaster 500. Each patient received a hydrophilic IOL (Pod Ay 26P) in 1 eye and a hydrophobic IOL (Podeye) in the other eye. One hour and 3 months postoperatively, retroillumination photographs were taken to assess rotational stability of the IOLs. In addition, autorefraction, subjective refraction, and Purkinje meter measurements were performed at the 3-month follow-up.
Results:
Eighty eyes of 40 patients were included in this study. Three months postoperatively, the IOL rotation within the first 3 months was 2.4 degrees ± 1.85 (SD) in the hydrophilic IOL group and 1.6 ± 1.61 degrees in the hydrophobic IOL group. This difference was statistically significant (P = .016).
Conclusion:
The hydrophobic IOL was rotationally more stable than the hydrophilic IOL, although both IOLs provided good capsular bag stability.