首页|Higher order aberrations and retinal image quality during short-term accommodation in children
Higher order aberrations and retinal image quality during short-term accommodation in children
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NSTL
Elsevier
Changes in higher order aberrations (HOA's) and retinal image quality during accommodation have not previ-ously been examined in children. This study measured ocular HOA's in ninety non-myopic, school-aged children during short-term accommodation tasks at 0, 3, 6, and 9 D demands presented via a Badal optometer mounted to a Hartmann-Shack wavefront aberrometer (COAS-HD, Wavefront Sciences). Eighty-four participants who exhibited active accommodation were included in the analyses. An eighth order Zernike polynomial was fit across a 2.3 mm, 4 mm, and natural pupil diameter to evaluate changes in refractive power vectors (M, J(180), and J(45)), accommodation errors (lags and leads), HOA root mean square (RMS) variables, individual Zernike co-efficients, and the visual Strehl ratio based on the optical transfer function (VSOTF). All HOA RMS variables changed significantly with accommodation, with the greatest change observed for the 9 D demand. Of the in-dividual Zernike coefficients, primary (C-4(0)) and secondary spherical aberration (C-6(0)) exhibited the greatest magnitude of change, becoming negative and positive with increasing accommodation, respectively. The VSOTF changed significantly with greater accommodation for both the 4 mm and natural pupil size, becoming signif-icantly worse for the 9 D demand. HOA's increase and retinal image quality decreases significantly during higher levels of accommodation in children, similar to adults. These findings provide a greater understanding of the optical properties of children's eyes and insights into possible mechanisms for the association between accom-modation, near work, and refractive error development.
NSTL
Elsevier
