Intraocular Lens Package Diopter Variability: Implications For Refractive Precision And Research Comparability
Published 2026 - 44th Congress of the ESCRS
Reference: FP13.06 | Type: Free paper | DOI: 10.82333/srna-xs60
Authors: Dr Ruth Sahler* 1 , Dr Michael Snyder 2 , Dr Liliana Werner 3
1R&D,Perfect Lens, LLC,Irvine,United States, 2Ophtalmology,University of Cincinnati,Cincinnati,United States, 3Ophtalmology,Moran Eye Center,Salt Lake City,United States
Purpose
To evaluate variability in measured optical power among intraocular lenses (IOLs) labeled with identical nominal diopters and to assess how such variability may influence refractive precision expectations and research comparability.
Setting
Laboratory-based optical evaluation study.
Methods
Thirty IOLs labeled 20.0 diopters (D), representing multiple models and manufacturers, were measured under standardized ISO1 model-eye conditions. For each lens, the dioptric position corresponding to peak optical performance was recorded. To isolate measurement-related variability, a single monofocal IOL was measured 30 times across three sessions involving two operators.
Results
Despite identical nominal labeling, measurable dispersion in peak dioptric position was observed across lenses, with an overall mean of 20.08 D ± 0.38 D. Variability was present both within and between lens models. Repeated measurements of a single lens demonstrated high short-term repeatability but small inter-session shifts in absolute dioptric readout independent of optical performance.
Conclusions
IOLs labeled with identical nominal power demonstrate inherent variability in measured optical power. Such variability may influence expectations of refractive precision and complicate cross-study or cross-device comparisons. Awareness of measurement dispersion and repeatability limits is important when interpreting high-resolution refractive outcomes and optical bench validation data.