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Y. Wang, K. Zhao, Y. Jin, T. Zuo; Wavefront Analysis of Higher Order Aberration in Patients With Corneal Haze After Photorefractive Keratectomy . Invest. Ophthalmol. Vis. Sci. 2003;44(13):2560.
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Purpose: To evaluate the relation between corneal haze and optical aberration after photorefractive keratectomy (PRK). Methods: Ten eyes with corneal haze (less than grade 2) for three months or more after PRK were measured with OPD Scan (Nidek) and a subjective aberrometer (SuZhou BriteEye Model WEA 1000). Thirty-two eyes without haze after PRK were measured also as a control group. Coefficients of 35 terms of Zernike aberrations were obtained from the aberrometer directly, and then used to estimate the root mean squared (RMS) of the overall wavefront aberrations and the RMS for each order of Zernike aberrations. Results: RMS wavefront error increased in both groups with or without corneal haze post-operation comparing with the data of pre-operation. The 3rd and 7th order aberrations of the corneal haze group were less than these in the control group. The horizontal and vertical coma of the corneal haze group were greater than that of the control group. However, the differences between the two groups were not significant. Conclusions: Our data suggest that slight corneal haze after PRK did not have significant influence on the optical aberrations of the eye.
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