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This book gives a thorough exposition of the work of von Helmholtz, Tscherning and Gullstrand on the subject of monochromatic aberrations of the eye. Of the three parts, the first is devoted to the presentation of the elements of mathematics necessary to a consideration of the algebraic, geometric and trigonometric aspects, presented in the other two parts. The second part is also introductory in content, since it deals with theories and laws and their application to image formation in general.
Part three contains the author's exposition of the subject, together with his original contributions to it. Keratoscopic findings with the Gullstrand mire permit the classification of corneal asymmetries into three groups, according to the distortion of the corneal reflex in the various meridians and the decentration of the pupil. By a method of subjective stigmatoscopy, the authors and two other subjects made their observations, which are reproduced to show in
Lo-Presti JJ. Sulla teoria delle aberrazione monochromatiche nell'occhio umano.. Arch Ophthalmol. 1949;41(6):765. doi:10.1001/archopht.1949.00900040786013