REVISITING THE VISUAL ACUITY CURVES. A PROPOSED METHODOLOGY FOR THE EVALUATION OF POSTOPERATIVE VISUAL ACUITY IN PRESBYOPIA.
Published 2025 - 29th ESCRS Winter Meeting
Reference: FP01.07 | Type: Free Paper | DOI: 10.82333/xc29-2c30
Authors: Minas Bakirtzis* 1 , Eirini-Kanella Panagiotopoulou 1 , Christos Panagis 1 , Christina Mitsi 1 , Asli Perente 1 , Ioannis Fotiadis 1 , Irfan Perente 1 , Georgios Labiris 1
1Ophthalmology,University Hospital of Alexandroupolis,Alexandroupolis,Greece
Purpose
To establish the minimum number of visual acuity (VA) measurements needed to accurately estimate the visual acuity curve (VAC) and area of the curve (AoC) for assessing presbyopia correction.
Setting
This study was conducted at the Department of Ophthalmology, University Hospital of Alexandroupolis, Greece.
Methods
The research included a validation and clinical phase involving 120 participants (120 eyes) who underwent bilateral pseudophakic presbyopia correction with premium intraocular lenses. Postoperative VAC and AoC were derived from VA measurements at nine specified distances. Using cubic spline interpolation, a model was developed to predict VAC and AoC values with reduced VA data points, comparing results from subsets of measurements to full nine-point data.
Results
Fewer than four VA measurements led to inaccurate VAC and AoC predictions. Optimal accuracy was achieved with four to six measurements. In the clinical group, mean prediction errors for VAC and AoC ranged from 2.54 letters/1.74% (six measurements) to 2.90 letters/2.9% (four measurements).
Conclusion
Cubic spline interpolation enables reliable estimation of VAC and AoC with as few as four VA measurements, provided they are taken at specific distances, improving efficiency in assessing presbyopia correction outcomes in clinical settings.