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Twenty-one chapters are devoted to history of lenses, physical and geometric optics, anatomy of the optical system of the eye, ametropia and defects of the visual system, methods to detect such defects (objective and subjective), corrective lenses, cycloplegics, presbyopia, aphakia, and heterophorias.
The paper is thin, of average quality, and rather poorly printed. The print is small. Copies of portraits of those contributing to this field in previous generations are inadequately reproduced. Color illustrations of fundus lesions are poor.
The discussion on geometric optics is brief, with a minimal number of formulas. The actions of prisms, spheres, and cylinders are presented in the same form and order as in English and American texts in this subject.
Basic principles of refraction by the human eye are given, including the theory of the various types of schematic eyes.
Determination of the objective and subjective refraction of the human eye is discussed in
La Refracción del ojó y sus anomalias.. AMA Arch Ophthalmol. 1959;61(4):678. doi:10.1001/archopht.1959.00940090680028