Hugh Davson – författare

The Physiology of the Eye, Third Edition reviews major advances in the physiology of the eye, including improvements in photochemical and electrophysiological techniques. In particular, the successful application of modern microelectrode techniques to the recording of activity at all stages in the visual pathway is considered. This edition is organized into five sections and begins with an overview of the vegetative physiology and biochemistry of the eye, emphasizing the aqueous humor and the intraocular pressure, the vitreous body, cornea, and lens. The following chapters discuss the mechanism of vision, including the electrophysiology of the retina, and some fundamental principles of ocular physiology. An account of the important advances made possible by the application of modern methods to the analysis of the eye movements, pupillary function, and so on is also given. The remaining sections focus on the theoretical and practical foundation laid by the work of classical research workers in the realm of physiological optics. This book is intended for students and researchers in fields ranging from ocular science to physiology and biochemistry.

The Eye, 3rd Edition, Volume lA: Vegetative Physiology and Biochemistry is devoted to the vegetative physiology and biochemistry of the eye. The book reviews significant progress in the anatomy of the eye and its physiological and biochemical aspects, particularly the structure of the tissues concerning the ocular fluid, the flow of aqueous humor, measurement of the intraocular pressure, and the macromolecular composition of the vitreus. This edition is organized into four chapters and begins with an overview of the anatomy of the human eye, paying particular attention to the orbit and adnexa, the eyeball, and motor and supporting apparatus of the eye. The reader is then introduced to the formation of ocular fluid, the structures in immediate contact with it in the ciliary body, and the anatomical aspects of the vascular circulation in the ciliary body. An account of the chemistry of the aqueous humor and factors affecting the intraocular pressure is also given. The book concludes by discussing the structure and function of the vitreus, focusing on the gel vitreus and liquid vitreus, as well as the rheological state and concentration of collagen, NaHA and proteins in the vitreus of various species from humans to frogs. This book is of interest to students and researchers in fields ranging from ocular science to physiology and biochemistry.

The Eye, 3rd Edition, Volume lb: Vegetative Physiology and Biochemistry deals with the vegetative physiology and biochemistry of the eye. The book reviews major advances in the anatomy of the eye and its physiological and biochemical aspects, particularly the cornea and sclera, the ordered state of the lens, and lens development, growth and regeneration. This edition is organized into three chapters and begins with an overview of the mechanical and optical properties of the cornea and sclera and their relationship to the underlying structure of the tissue. This book shows that, in the cornea, the maintenance of the tissue structure requires the constant action of a fluid transport system dependent upon metabolic energy. The pathways of corneal nutrition, the sensitive corneal innervation, and the growth processes in the cornea and sclera are also discussed, emphasizing the mammalian cornea. The next chapter examines the use of physical and chemical techniques to determine how the ordered state of the lens is maintained and why that state is susceptible to chaotropic attack. Finally, an account of the metabolism of the lens and how cataract forms is given. This book is a valuable resource for students and researchers in fields ranging from ocular science to physiology and biochemistry.

Physiology of the Eye, Fourth Edition reviews major advances in the physiology of the eye, including improvements in photochemical and electrophysiological techniques. In particular, the successful application of modern microelectrode techniques to the recording of activity at all stages in the visual pathway is considered. This edition is organized into four sections encompassing 23 chapters and begins with an overview of the anatomy of the eye and its vegetative physiology and biochemistry, paying particular attention to the aqueous humor and the intraocular pressure, the vitreous body, the cornea, and the lens. The discussion then shifts to the mechanism of vision, including its photochemical aspects and muscular mechanisms, and the neurophysiology of visual perception. Advances in electrophysiology of the receptors, and of the central nervous pathways of vision and eye movement, are examined along with the remarkable developments in separative techniques of the lens crystallins and the biochemical aspects of lens transparency. This book is a valuable resource for students and researchers in fields ranging from ocular science to physiology and biochemistry.

For forty years Hugh Davson''s Physiology of the Eye has been regarded as the leading textbook in ophthalmology. This extensively revised and updated fifth edition maintains this reputation and presents the author''s lifelong expertise to the student. The structure and content have been revised to keep abreast of current teaching and research interests, while maintaining the style and clarity of previous editions.

The Eye: Volume 2, The Visual Process is a compendium of papers that describes the physiology of the eye, particularly the visual functions, the photobiology of the visual process, and the visual pathway. One paper describes the light stimuli used in physiological experiments concerning vision in terms of their spectral energy distribution, particularly the amounts of light absorbed by the photosensitive substances contained in the retinal receptors. Another paper explains the mosaic-like arrangement of the receptors and the variations of this mosaic in the different regions of the retina, including the Purkinje phenomenon which can cause errors in visual measurements. One paper examines the directional properties of the rods at long wavelengths and the theory of the Stiles-Crawford effect. Other papers investigate the limits of the visible spectrum, the scotopic luminous efficiency, theories of dark-adaptation, as well as the minimum retinal illumination, the minimum flux of energy, and the minimum amount necessary for vision. One paper notes that whereas one rod can be stimulated by one quantum (a discrete process involving one pigment molecule), it is not sufficient to make a human subject see a light stimulus. The compendium is invaluable for researchers and investigators involved in physiology, psychology, ophthalmology, and in all branches of ocular physiology.

The Eye, Volume 4: Visual Optics and the Optical Space Sense provides a well-integrated and authoritative account of the physiology of the eye. The book is organized into two parts. Part I on visual optics begins with a discussion of the branches of optics and the basic principles of geometrical optics. This is followed by separate chapters on refraction at plane and spherical surfaces; the thin spherical lens in air; reflexion at plane and spherical surfaces; the astigmatic lens; aberrations of optical images; ametropia and its correction; and retinoscopy and ophthalmoscopy. Part II on the optical space sense includes discusses of objective and subjective space; spatial localization according to direction; perception of distance and of size; spatial localization through binocular vision; special topics in binocular spatial localization; and ocular dominance and binocular retinal rivalry. Whilst the emphasis has been on readability rather than exhaustiveness, the various accounts are sufficiently well documented to make the treatise valuable not only to teachers in physiology, psychology and ophthalmology, but also to research workers in all branches of ocular physiology.