Abstract
Purpose To investigate the effect of the degree of astigmatism on optical quality in children. The important objective evaluation parameters we focus on include the RMS of the high-order aberrations, MTF, and PSF. Methods The children, age ranging from 7 to 10 years old, underwent an optometry examination. Fifty-nine children who met the inclusion criteria were divided into three groups: A (1.0 D ≤ astigmatism < 2.0 D), B (2.0 D ≤ astigmatism < 3.0 D), and C (3.0 D ≤ astigmatism < 4.0 D). The OPD-SCAN-III aberrometer was used to measure PSF, MTF, and other optical parameters. Total higher-order aberrations, total coma aberrations, total spherical aberrations, and total trefoil aberrations corresponding to the RMS value, the AR value of MTF, and the SR value of PSF with a 4 mm pupil diameter were assessed. Results RMS-HO, RMS-T.Coma, RMS-T.Tre, and RMS-T.Sph in the three groups were significantly increased with increasing the degree of astigmatism, while there were no significant differences in RMS-T.Sph between the groups. The AR value and the SR value decreased with increasing degree of astigmatism, and there were significant differences in the AR value and the SR value. Conclusion Astigmatism has a significant influence on the higher-order aberrations, MTF, and PSF in the children. The effect of astigmatism value on the optical quality is mainly reflected in the change in these three parameters.
Highlights
Eye is an important human sensory organ that receives 2/3 of the total external sensory information [1]
It was found that RMS-HO, RMS-T.Coma, and RMS-T.Tre increased as the astigmatism values increased
While RMS-T.Sph increased as the astigmatism values increased, there was no significant difference between the three groups (P > 0 05)
Summary
Eye is an important human sensory organ that receives 2/3 of the total external sensory information [1]. All people wish to have good visual acuity and visual quality. Any changes of the optical system make influence on visual quality. The research on optical quality is mainly focused on wavefront aberration [2, 3], few data demonstrating the relationship between wavefront aberration and the optical quality of children. Astigmatism, one of the defects of the optical system, has a great effect on the development of visual acuity [4]. Researchers have been paying more attention to the development of children’s optical quality [5, 6]. We aimed to evaluate the influence of the degree of astigmatism on the optical quality in children. The evaluation parameters used in our study include the RMS of higherorder aberrations (HOAs), MTF, and PSF
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
