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 xi
... standard , but seem rather to have been settled , especially as regards their dimensions at the various dis- tances at which they are usually placed for firing practice , accord- ing to the proportions which have been considered , from ...
... standard , but seem rather to have been settled , especially as regards their dimensions at the various dis- tances at which they are usually placed for firing practice , accord- ing to the proportions which have been considered , from ...
Page xii
... standard owing to refractive defects , is so great as to render it advisable , from a military and financial point of view , to allow correcting spectacles to be used in the ranks of the army ? and , in case of a decision being come to ...
... standard owing to refractive defects , is so great as to render it advisable , from a military and financial point of view , to allow correcting spectacles to be used in the ranks of the army ? and , in case of a decision being come to ...
Page xiii
... standard of measurement for the ordinary purposes of society and commerce . It thus becomes necessary for British medical officers to be acquainted with both systems of measurement , and to be able to convert any expressions according ...
... standard of measurement for the ordinary purposes of society and commerce . It thus becomes necessary for British medical officers to be acquainted with both systems of measurement , and to be able to convert any expressions according ...
Page xviii
... standard of visual acute- ness Test - types in military practice Acuteness of V. with ametropia Symptoms 173 160 • Diagnosis 174 Motor asthenopia 175 160 Accommodatory asthenopia . 175 162 • 163 166 Treatment of asthenopia Impaired ...
... standard of visual acute- ness Test - types in military practice Acuteness of V. with ametropia Symptoms 173 160 • Diagnosis 174 Motor asthenopia 175 160 Accommodatory asthenopia . 175 162 • 163 166 Treatment of asthenopia Impaired ...
Page 23
... standard of unity . Starting from this high point , a series of lenses , say 25 + and 25 - lenses , descend in succession with lessened refracting power , and , consequently , with the position of the principal focus proportionally ...
... standard of unity . Starting from this high point , a series of lenses , say 25 + and 25 - lenses , descend in succession with lessened refracting power , and , consequently , with the position of the principal focus proportionally ...
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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