The Sight and how to Preserve itHardwicke and Bogue, 1878 - 95 pages |
From inside the book
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Page 13
... inches from it , and look at it fixedly with both eyes , you will notice that a distinct effort is made to turn the eyes inward ; and if you con- tinue to look at the finger in this position , the act will soon become painful . The ...
... inches from it , and look at it fixedly with both eyes , you will notice that a distinct effort is made to turn the eyes inward ; and if you con- tinue to look at the finger in this position , the act will soon become painful . The ...
Page 17
... inch focus , and that they are to be worn only in reading , sewing , and such occupations as require the accommodative apparatus of the eye to be brought into use . The moment the eye tires , the glasses must be removed ; to be replaced ...
... inch focus , and that they are to be worn only in reading , sewing , and such occupations as require the accommodative apparatus of the eye to be brought into use . The moment the eye tires , the glasses must be removed ; to be replaced ...
Page 23
... inches focus , the vision for distance will be improved . And the fine print on page 22 will be read more easily , -- the print will be blacker , -by putting on convex glasses of 40 or 48 inches focus . When there is a doubt as to the ...
... inches focus , the vision for distance will be improved . And the fine print on page 22 will be read more easily , -- the print will be blacker , -by putting on convex glasses of 40 or 48 inches focus . When there is a doubt as to the ...
Page 32
... the weakest with which he can read the fine type on page 22 at twelve inches from the eye . Weak and painful sight in adults due to near - sight is to be relieved by rest of the eyes , avoidance of bright evening 32 THE SIGHT .
... the weakest with which he can read the fine type on page 22 at twelve inches from the eye . Weak and painful sight in adults due to near - sight is to be relieved by rest of the eyes , avoidance of bright evening 32 THE SIGHT .
Page 36
... inches . If too strong , the print must be brought nearer than ten inches to see clearly , and this will tire the muscles of con- vergence that turn the eyes inward . If too weak , the fine print will have to be held farther than twelve ...
... inches . If too strong , the print must be brought nearer than ten inches to see clearly , and this will tire the muscles of con- vergence that turn the eyes inward . If too weak , the fine print will have to be held farther than twelve ...
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Common terms and phrases
30 Coloured Plates accommodative power adjusting power BOTANY BRITISH BIRDS BRITISH BUTTERFLIES brought cataract cinder cloth extra cloth gilt Coloured Figures concave glasses Containing convex glasses Crown 8vo Demy 8vo Descriptions disease distant objects Enlarged enter the eye eye-ball eye-glasses fatigue Fcap FERNS Figures of Eighty FLOWERING PLANTS FLOWERS focus focussing power Fourth Edition HARDWICKE & BOGUE Health HENRY POWER Illustrated with 32 Illustrated with numerous inches J. E. TAYLOR JARDINE Larvæ Lecture lens London look MANUAL Marsupialia MICROSCOPE MORTIMER GRANVILLE muscle of accommodation muscle of convergence myopia NATURAL HISTORY NEAR-SIGHT IN CHILDREN noticed numerous Illustrations numerous Woodcuts oculist old sight pain Piccadilly Plain and Easy Plants PROGRESSIVE NEAR-SIGHT pupil Quarterly R. A. PROCTOR rays of light reach the retina reduced price 16s regard near objects Science Gossip Second Edition seen in Fig Sir WILLIAM JARDINE Species super-royal 8vo Third Edition tion tissues upper lid Vols weak sight Woodcuts
Popular passages
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Page 9 - THOMAS, THE PREPARATION and MOUNTING of MICROSCOPIC OBJECTS. New Edition, greatly Enlarged and brought up to the Present Time by JOHN MATTHEWS, MD, FRMS, Vice-President of the Quekett Microscopical Club. Fcap. 8vo, cloth, 2s.
Page 22 - Drawing of every British Plant. Edited and brought up to the Present Standard of Scientific Knowledge by T. BOSWELL (formerly SYME), LL.DFLS, &c. With Popular Descriptions of the Uses, History, and Traditions of each Plant, by Mrs. LANKESTEB, Author of " Wild Flowers Worth Notice," " The British Ferns,
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Page 25 - Containing an Alphabetical List of the House of Lords, Dates of Creation, Lists of Scotch and Irish Peers, Addresses, &c. 32mo, cloth, is. Published annually. THE SHILLING BARONETAGE. Containing an Alphabetical List of the Baronets of the United Kingdom, Short Biographical Notices, Dates of Creation, Addresses, &c.
Page 18 - Man. INSECTS, 7 Vols. Introduction to Entomology, British Butterflies and Moths, 2 Vols., Foreign Butterflies and Moths, 2 Vols., Beetles, Bees. FISHES, 6 Vols. Introduction and Foreign Fishes, British Fishes, 2 Vols., Perch Family, Fishes of Guiana, 2 Vols. Fuller Details of these will be found under the authors