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 vii
... appear for the first time in this edition , and , with the single exception of fig . 65 , are taken from original drawings furnished by my late colleague , Inspector - General Dr. Macdonald , R.N. , F.R.S. , will be sufficiently ...
... appear for the first time in this edition , and , with the single exception of fig . 65 , are taken from original drawings furnished by my late colleague , Inspector - General Dr. Macdonald , R.N. , F.R.S. , will be sufficiently ...
Page 2
... appears as a plane figure , having two dimensions , viz . , length and breadth ( see fig . 1 ) . When a group of objects is regarded monocularly , although the lights and shadows among them are visible , no means are afforded of ...
... appears as a plane figure , having two dimensions , viz . , length and breadth ( see fig . 1 ) . When a group of objects is regarded monocularly , although the lights and shadows among them are visible , no means are afforded of ...
Page 3
... appears , as it really is , single ; having three dimensions , viz . length , breadth , and thickness ; and consciousness of relief is obtained ( see fig . 2 ) . A wider field and range of vision are obtained with B 2 СНАР . І 3 ...
... appears , as it really is , single ; having three dimensions , viz . length , breadth , and thickness ; and consciousness of relief is obtained ( see fig . 2 ) . A wider field and range of vision are obtained with B 2 СНАР . І 3 ...
Page 4
... appears to be greater and its tint more saturated than when it is looked at by one eye singly . Owing to the visual perception being thus intensified , the rapidity R OX A FIG . 4. - DIPLOPIA . Images crossed . R , right eye ; L , left ...
... appears to be greater and its tint more saturated than when it is looked at by one eye singly . Owing to the visual perception being thus intensified , the rapidity R OX A FIG . 4. - DIPLOPIA . Images crossed . R , right eye ; L , left ...
Page 10
... appear to change with changes in the position of the eyes looking at them . But the mind judges of the positions of objects by fol- lowing , as it were , the directions of the axial rays proceeding to all the points of these objects ...
... appear to change with changes in the position of the eyes looking at them . But the mind judges of the positions of objects by fol- lowing , as it were , the directions of the axial rays proceeding to all the points of these objects ...
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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