On long, short, and weak sight

Paperback | January 17, 2012

byJohn Soelberg Wells

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This historic book may have numerous typos or missing text. Not indexed. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. 1873. Not illustrated. Excerpt: ... CHAPTER I. THE ACCOMMODATION OF THE EYE. The affections of the refraction and accommodation of the eye are daily assuming more importance, and are engaging more and more the attention of some of our most able and scientific ophthalmologists. For it is now known that certain forms of asthenopia and amblyopia, which had in former times set all remedies at defiance, are not due, as was generally supposed, to serious lesions of the inner tunics of the eyeball, but are in reality dependent upon some anomaly of the refraction of the eye, or a peculiar asymmetry of the organ (astigmatism). Since the discovery of these important facts, a considerable group of cases has been found to be amenable to treatment; cases, which had formerly sorely puzzled the oculist, and were by him but too often deemed incurable. We are all well acquainted with the anxious tale so often told by the over-worked student and literary man, or by the distressed and careworn artisan or sempstress. They complain that their eyes, which are to all appearance perfectly healthy, soon fail to fulfil their task, and speedily become wearied and fatigued during continuous employment at near objects, as, for instance, in reading, sewing, or engraving; thus necessitating a more or less prolonged cessation from work. This weakness of sight naturally renders these patients peculiarly anxious and nervous, leading them-to fear that they are afflicted with some grave and dangerous affection, which threatens either great impairment of vision, or even complete loss of sight. We are chiefly indebted to Donders for the important discovery that this troublesome affection (asthenopia) is, in the majority of cases, due to hypermetropia, and easily cured by the proper use of glasses. The greater the strides which h...

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This historic book may have numerous typos or missing text. Not indexed. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. 1873. Not illustrated. Excerpt: ... CHAPTER I. THE ACCOMMODATION OF THE EYE. The affections of the refraction and accommodation of the eye are daily assuming more ...

Format:PaperbackDimensions:52 pages, 9.69 × 7.44 × 0.11 inPublished:January 17, 2012Publisher:General Books LLCLanguage:English

The following ISBNs are associated with this title:

ISBN - 10:0217520715

ISBN - 13:9780217520713

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