The Illustrated Optical Manual, Or Handbook of Instructions for the Guidance of Surgeons in Testing Quality and Range of Vision, and in Distinguishing and Dealing with Optical Defects in General |
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Page ix
... less revised than re - written . When the increased and increasing importance attached to the expert use of firearms of all descriptions , both rifles and guns , at very long ranges is remembered , it may reasonably be expected that ...
... less revised than re - written . When the increased and increasing importance attached to the expert use of firearms of all descriptions , both rifles and guns , at very long ranges is remembered , it may reasonably be expected that ...
Page xiii
... less directly connected with visual examination and the correction of visual defects , a knowledge of which is essential to a right understanding of the principles on which the practical part of the work is conducted . Experience in ...
... less directly connected with visual examination and the correction of visual defects , a knowledge of which is essential to a right understanding of the principles on which the practical part of the work is conducted . Experience in ...
Page 4
... under binocular vision . The greater or less degree of convergence of the visual lines which accompanies binocular vision also helps the observer to form ideas of the distances at which 4 CHAP . I THE ILLUSTRATED OPTICAL MANUAL.
... under binocular vision . The greater or less degree of convergence of the visual lines which accompanies binocular vision also helps the observer to form ideas of the distances at which 4 CHAP . I THE ILLUSTRATED OPTICAL MANUAL.
Page 11
... less than it is in an elongated or myopic eye , and the rays proceeding to form the retinal image of an object , being sectionally interrupted in their course earlier in the former than in the latter case , the areal size of the image ...
... less than it is in an elongated or myopic eye , and the rays proceeding to form the retinal image of an object , being sectionally interrupted in their course earlier in the former than in the latter case , the areal size of the image ...
Page 19
... its converging power and the less the distance of its principal focus ; the more concave the lens , or again the shorter the radii of curvature of its two surfaces ,. FIG . 18. - CONVEX AND CONCAVE LENSE 3 . U 2 CHAP . I 19 LENSES.
... its converging power and the less the distance of its principal focus ; the more concave the lens , or again the shorter the radii of curvature of its two surfaces ,. FIG . 18. - CONVEX AND CONCAVE LENSE 3 . U 2 CHAP . I 19 LENSES.
Other editions - View all
The Illustrated Optical Manual: Or Handbook of Instructions for the Guidance ... T. Longmore No preview available - 2018 |
The Illustrated Optical Manual, Or Handbook of Instructions for the Guidance ... Thomas Longmore, Sir No preview available - 2016 |
Common terms and phrases
accommodation acuteness of vision amblyopia ametropia ametropic amount of Acc appear army asthenopia astigmatic eye astigmatism axis binocular vision bull's-eye cause centre ciliary muscle colour colour-blindness concave lens convex lens cornea correcting lens correction Crown 8vo curvature cylindrical lens defect Diagnosis diffusion dioptric diplopia direction distance distant objects distant point distinct vision emmetropic examination exerted exist eye under observation feet focal fundus glasses inches keratoscopy left eye lenses lessened medical officer meridian Mc military service mirror myope myopic neutralised normal acuteness ocular ophthalmoscopic optic parallel rays patient person placed point of distinct power of Acc practice principal focus principal meridians prism rays of light rays proceeding recruit refractive defect refractive power refractive quality regards rendered retina retinal images rifle right eye seen shadow sight soldier spectacles spherical strabismus surgeon target test-dots tion unfit visual acuteness visual angle visual lines
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