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[Clinical study of higher order wavefront aberrations with a Tscherning aberrometer]
Yue-guo Chen1, Yan-ying Zhong, Ying-jie Xia
1Department of Ophthalmology, Peking University Third Hospital, Peking University Eye Center, Beijing 100083, China. chenyueguo@sina.com
Objective:
To study the higher order aberrations of emmetropic and ametropic eyes with wavefront aberrometer.
Methods:
Forty of cases 77 emmetropic and ametropic eyes were measured with an aberrometer based on Tscherning's principle with the pupils dilated. The Zernike coefficients and root mean square values of wavefront aberrations up to the 6th order were recorded and statistically analyzed.
Results:
The C06, C07, C08, C12, C13, C14, C24, C26, and C27 were significantly different from zero under 7 mm pupil size and the C06, C10, C12, C23, and C24 were significantly different from zero under 4 mm pupil size. There was no significant difference of higher order wavefront aberrations between emmetropic and ametropic eyes. Comparing the age of 40 years or less with the age over 40 years, there were significant differences in RMS3 between the two under 7 mm pupil size, and statistical differences in RMS6 and RMSh between the two under 4 mm pupil size.
Conclusion:
There are certain higher order wavefront aberrations in the normal human eyes, especially with the pupils dilated. No differences are found in higher order aberrations between emmetropic and ametropic eyes. The higher order aberrations of the age over 40 years are more than those of the age of 40 years or younger.
