000169975 001__ 169975
000169975 005__ 20260316092629.0
000169975 0247_ $$2doi$$a10.1007/s44402-026-00036-0
000169975 0248_ $$2sideral$$a148544
000169975 037__ $$aART-2026-148544
000169975 041__ $$aeng
000169975 100__ $$aCabrera-Guardiola, Inés
000169975 245__ $$aInfluence of Light Wavelength and Optotype Size on Accommodative Response and Aberrometric Changes Across the Adult Lifespan
000169975 260__ $$c2026
000169975 5060_ $$aAccess copy available to the general public$$fUnrestricted
000169975 5203_ $$aPurpose
To analyse the effects of chromatic light (white, blue, red and green) and stimulus size (6/6 and 6/12) on pupil constriction, Zernike coefficients and the accommodative response curve using wavefront aberrometry across a wide age range of healthy subjects.
Methods
One hundred and sixty-four right eyes from participants aged 20–75 years were evaluated. All subjects showed normal near visual function for their age. Wavefront aberrations were measured under scotopic conditions using the IRX3 aberrometer. Accommodation was induced from 0 to 10 D in the younger group and from 0 to 5 D in the full sample. Stimuli varied in colour and size. Pupil diameter and Zernike coefficients were analysed, rescaling all maps to a 3.00 and a 3.65 mm pupil, respectively.
Results
Mean pupil diameter ± standard deviation decreased progressively with increasing accommodative demand by 0.51 ± 0.06 mm in the full sample (0–5 D) and by 2.09 ± 0.11 mm in the younger group (0–10 D). The greatest changes were observed under white light and larger stimuli. The Zernike component C(2,0) varied significantly across all filters, optotype sizes and in both the total (p < 0.003) and the younger (p < 0.0009) groups. However, C(4,0) showed significant changes in all conditions for the younger group (p < 0.0009), particularly at higher demands. An initial overaccommodation of approximately 1 D at baseline was followed by a progressive lag beyond 5 D, being more pronounced under red light, where the accommodative response was lowest, while white light consistently elicited the strongest response. Larger stimuli induced greater responses than smaller ones, especially at high demands.
Conclusion
Accommodation efficiency varies with wavelength and stimulus size: white and blue lights triggered greater pupil constriction and accommodation than red and green, with corresponding changes in defocus and spherical aberration. Small stimuli improved low-demand responses, while larger ones were more effective at higher demands.
000169975 540__ $$9info:eu-repo/semantics/openAccess$$aby$$uhttps://creativecommons.org/licenses/by/4.0/deed.es
000169975 655_4 $$ainfo:eu-repo/semantics/article$$vinfo:eu-repo/semantics/publishedVersion
000169975 700__ $$0(orcid)0000-0003-2710-1875$$aOrduna-Hospital, Elvira$$uUniversidad de Zaragoza
000169975 700__ $$0(orcid)0009-0006-7694-8086$$aArcas-Carbonell, María
000169975 700__ $$0(orcid)0000-0002-5621-1937$$aSanchez-Cano, Ana$$uUniversidad de Zaragoza
000169975 7102_ $$12002$$2647$$aUniversidad de Zaragoza$$bDpto. Física Aplicada$$cÁrea Óptica
000169975 773__ $$g(2026), [19 pp.]$$pOphthalmic physiol. opt.$$tOPHTHALMIC AND PHYSIOLOGICAL OPTICS$$x0275-5408
000169975 8564_ $$s11976304$$uhttps://zaguan.unizar.es/record/169975/files/texto_completo.pdf$$yVersión publicada
000169975 8564_ $$s2661701$$uhttps://zaguan.unizar.es/record/169975/files/texto_completo.jpg?subformat=icon$$xicon$$yVersión publicada
000169975 909CO $$ooai:zaguan.unizar.es:169975$$particulos$$pdriver
000169975 951__ $$a2026-03-16-08:16:05
000169975 980__ $$aARTICLE