Abstract:

Objective To investigate the effects of accommodative response induced by near work and changes of wavefront aberration of myopic eyes. Methods One hundred and forty-five study objectives were divided into emmetropic eye group(n=46) and myopic eye group(n=99). The amplitude of accommodation, response magnitude of accommodation and wavefront aberration (including whole-eye high-order aberration, high-order aberration within eye and corneal high-order aberration) were measured, changes of whole-eye high-order aberration and corneal high-order aberration before and after accommodation induced by near work were observed, and correlation analysis was performed between accommodative response induced by near work and changes of aberration. Results There was no significant difference in the amplitude of accommodation between two groups(P>0.05), and the response magnitude of accommodation in myopic eye group was significantly lower than that in emmetropic eye group(P<0.05). Compared with that before accommodation induced by near work, the whole-eye aberration after accommodation induced by near work significantly increased in both groups (P<0.05), and the total high-order aberration and third-order aberration significantly increased in myopic eye group(P<0.05). Correlation analysis revealed that changes of aberration of image quality on retina in emmetropic eye group related to accommodative response induced by near work to some extent (P<0.05), while there were no such findings in myopic eye group. Conclusion After near work, insufficient accommodation, increase of high-order wavefront aberration and irregularity of changes of wavefront aberration can be observed simultaneously in myopia. It will substantially help to improve the retinal image quality by compensating the definite wavefront aberration when refractive error has been well corrected in myopia.

Key words: wavefront aberration, myopia, accommodation, near work