Main description:

This book is a translation by Professor Sami El Hage of Volume I of Le Grand's three-volume treatise on physiological optics. It is the last of the three volumes to be translated into English. Le Grand's second volume was translated into English by Hunt, Walsh and Hunt and published in 1957 under the title Light, Colour and Vision. His third volume was translated into English by Millodot and Heath in 1966 and published under the title Form and Space Vision. Although Le Grand's three volumes have been compared to the three volumes of Helmholtz, it is important to note that Le Grand has distributed differently the topics in his three volumes. This book is a mixture of the tradition established by Helmholtz and followed by Tscherning and Sheard with the tradition originated by Danders and followed by Landolt and Laurance and others. Helmholtz's first volume was concerned with the image forming structure of the eye, almost without reference to practical problems of examining patients and fitting them with glasses. It dealt with the problems of a single eye.

Contents:

1. Introduction.- 2. Description of the Human Eye.- 3. The Dimensions of the Eye.- 4. Optics of the Eye.- 5. The Retinal Image.- 6. Accommodation.- 7. Theories of Accommodation.- 8. Spherical Ametropia.- 9. Correction of Ametropia.- 10. Spherical Corrective Lenses.- 11. Corneal Astigmatism.- 12. Vision of the Astigmatic.- 13. The Orbit and Its Muscles.- 14. Geometry of the Movements of the Eye.- 15. Correction of the Mobile Eye (Far Vision).- 16. Correction of the Mobile Eye (Near Vision — Astigmatic Eye).- 17. Normal Binocular Movements.- 18. Anomalies of Binocular Movements.- 19. Corrective Lenses and Binocular Vision.- 20. Measurement of Visual Acuity.- 21. Subjective Optometers.- 22. Ophthalmoscopes.- 23. Objective Measurement of Refraction.- Exercises.- Solutions to the Exercises.- References.- Author Index.