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This book is the outcome of a series of lectures given in the Faculty of Medicine of the University of Mexico during the summer of 1939 by Professor Marquez, who became established in Mexico after the end of the Civil War in Spain. The twenty lectures included are recapitulations of subject matter which has already been published and in which Professor Marquez has a claim for originality. The volume is well printed and illustrated and shows the same editorial care as the same author's textbook of ophthalmology.
The twenty-two lectures cover a great field, from geometric optics to neurology of the eye and from the anatomy and physiology of the ocular movements and of the pupil to Cajal's work and operations on the iris and lids. Each chapter has a brief summary in English which makes the book accessible to American readers.
Lesson 3 deals with dioptric measurements in optics.