Die Ophthalmologie · 2026
[Performance evaluation of a visual simulator for intraocular lenses].
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La Schiazza O, Kornfeld M, Brezna W, Dragostinoff N, Plank N, Socías R
Аннотация
BACKGROUND: Intraocular lens (IOL) simulators are gaining increasing interest in preoperative consultation and assessment of patient acceptance of IOLs in refractive lens exchange. A novel optical device, RALV (DEZIMAL GmbH, Vienna, Austria) enables patients to look through an actual commercially available IOL prior to implantation.
OBJECTIVE: The aim of this prospective study was to evaluate the performance of RALV for preoperative simulation of postoperative visual performance following implantation of trifocal IOLs.
METHODS: Preoperative and postoperative measurements of visual acuity and contrast sensitivity at near, intermediate and far distances were performed as well as halo/glare measurements in patients undergoing Clear Lens Exchange (CLE). Pairwise clustered equivalence tests using the Two-One-Sided-Test (TOST) procedure were conducted to assess statistical equivalence between preoperative and postoperative measurements.
RESULTS: A statistically significant equivalence was found between preoperatively predicted outcomes obtained with RALV and postoperatively measured values for visual acuity and contrast sensitivity, with an agreement better than ±0.1 logMAR and ±0.25 logCSWeber, respectively. Halo/glare measurements showed agreement within ±4.55 mrad.
CONCLUSION: The RALV system enables preoperative prediction of visual performance with a trifocal IOL in CLE patients within reasonable bounds. This could support preoperative counselling and improve predictability in refractive lens exchange.
OBJECTIVE: The aim of this prospective study was to evaluate the performance of RALV for preoperative simulation of postoperative visual performance following implantation of trifocal IOLs.
METHODS: Preoperative and postoperative measurements of visual acuity and contrast sensitivity at near, intermediate and far distances were performed as well as halo/glare measurements in patients undergoing Clear Lens Exchange (CLE). Pairwise clustered equivalence tests using the Two-One-Sided-Test (TOST) procedure were conducted to assess statistical equivalence between preoperative and postoperative measurements.
RESULTS: A statistically significant equivalence was found between preoperatively predicted outcomes obtained with RALV and postoperatively measured values for visual acuity and contrast sensitivity, with an agreement better than ±0.1 logMAR and ±0.25 logCSWeber, respectively. Halo/glare measurements showed agreement within ±4.55 mrad.
CONCLUSION: The RALV system enables preoperative prediction of visual performance with a trifocal IOL in CLE patients within reasonable bounds. This could support preoperative counselling and improve predictability in refractive lens exchange.