A Novel Method for Analysing the Curvature of the Anterior Lens: Multi-Radial Scheimpflug Imaging and Custom Conic Fitting Algorithm
Arcas-Carbonell, María ; Orduna-Hospital, Elvira (Universidad de Zaragoza) ; Mechó-García, María ; Fernández-Espinosa, Guisela (Universidad de Zaragoza) ; Sanchez-Cano, Ana (Universidad de Zaragoza)
Resumen: This study describes and validates a novel method for assessing anterior crystalline lens curvature along vertical and horizontal meridians using radial measurements derived from Scheimpflug imaging. The aim was to evaluate whether pupil diameter (PD), anterior lens curvature, and anterior chamber depth (ACD) change during accommodation and whether these changes are age-dependent. A cross-sectional study was conducted on 104 right eyes from healthy participants aged 21–62 years. Sixteen radial images per eye were acquired using the Galilei Dual Scheimpflug Placido Disk Topographer under four accommodative demands (0, 1, 3, and 5 dioptres (D)). Custom software analysed lens curvature by calculating eccentricity in both meridians. Participants were analysed as a total group and by age subgroups. Accommodative amplitude and monocular accommodative facility were inversely correlated with age. Both PD and ACD significantly decreased with higher accommodative demands and age. Relative eccentricity decreased under accommodation, indicating increased lens curvature, especially in younger participants. Significant curvature changes were detected in the horizontal meridian only, although no statistically significant differences between meridians were found overall. The vertical meridian showed slightly higher eccentricity values, suggesting that it remained less curved. By enabling detailed, meridionally stratified in vivo assessment of anterior lens curvature, this novel method provides a valuable non-invasive approach for characterizing age-related biomechanical changes during accommodation. The resulting insights enhance our understanding of presbyopia progression, particularly regarding the spatial remodelling of the anterior lens surface.
Idioma: Inglés
DOI: 10.3390/jimaging11080257
Año: 2025
Publicado en: JOURNAL OF IMAGING 11, 8 (2025), 257 [20 pp.]
ISSN: 2313-433X
Tipo y forma: Article (Published version)
Área (Departamento): Área Óptica (Dpto. Física Aplicada)
0
Exportado de SIDERAL (2025-10-17-14:33:16)
Idioma: Inglés
DOI: 10.3390/jimaging11080257
Año: 2025
Publicado en: JOURNAL OF IMAGING 11, 8 (2025), 257 [20 pp.]
ISSN: 2313-433X
Tipo y forma: Article (Published version)
Área (Departamento): Área Óptica (Dpto. Física Aplicada)
0
Exportado de SIDERAL (2025-10-17-14:33:16)
Este artículo se encuentra en las siguientes colecciones:
articulos > articulos-por-area > optica
Notice créée le 2025-08-26, modifiée le 2025-10-17
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