Expressions for third-order aberration in the reconstructed wave front of point objects are established by Meier. But Smith, Neil Mohon, Sweatt independently reported that their results differ from that of Meier. We found that coefficients for spherical aberration, astigmatism, tally with Meier’s while coefficients for distortion and coma differ. Keywords Spherical aberration coefficient - coma - distortion - astigmatism PACS Nos 42.15.Fr - 42.40.Lx - 42.40.E4 - 42.40.Kw
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