Affiliation:
1. Aragon Institute for Engineering Research (I3A) University of Zaragoza Zaragoza Spain
2. GIMSO, Institute for Health Research Aragón Hospital Universitario Miguel Servet Zaragoza Spain
3. UFR, Department of Ophthalmology University Hospital Miguel Servet Zaragoza Spain
4. ARCCA, Department of Ophthalmology Hospital Nuestra Señora de Gracia Zaragoza Spain
Abstract
AbstractObjectiveTo establish a methodology for objectively estimating the Lens Equatorial Plane (LEP) from clinical images, comparing LEP with dilated versus non‐dilated pupils.MethodsA cohort of 91 eyes from 60 patients undergoing preoperative assessments for cataract surgery was evaluated. Anterior Segment Optical Coherence Tomography (AS‐OCT) images were analysed under conditions of pharmacologically induced pupil dilation versus a non‐dilated pupil. Geometrical parameters, including LEP, intersection diameter (ID), lens thickness (LT), anterior and posterior lens thickness were automatically calculated by applying standard image processing techniques to clinical AS‐OCT images.ResultsSignificant differences in lens parameters, including LEP, were observed between dilated and non‐dilated conditions (all p < 0.001). A strong linear correlation was found across all geometrical variables under both conditions (r[LEP] = 0.64, r[ID] = 0.78, r[LT] = 0.99, all p < 0.001); enabling reliable correction of these differences.ConclusionThe study introduces an objective methodology for LEP calculation, emphasising the need to consider the eye's physiological state during preoperative measurements. Incorporating LEP into future intraocular lens (IOL) power calculation formulas and replacing the habitual effective lens position may potentially improve the accuracy of IOL power estimation and thus postoperative visual outcomes.