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 xix
... bull's - eyes 182 By round dots at 5 feet 187 Visual angles of target bull's - eyes By square dots at 15 feet 187 ... eye 191 Conditions under which Amblyo- pia disqualifies 199 Defect of V. in either eye of a re- Weak V. from other ...
... bull's - eyes 182 By round dots at 5 feet 187 Visual angles of target bull's - eyes By square dots at 15 feet 187 ... eye 191 Conditions under which Amblyo- pia disqualifies 199 Defect of V. in either eye of a re- Weak V. from other ...
Page 52
... eye along the bottom of a notch in the backsight in the direction of the projecting top of the foresight , which ... bull's - eye of a target at a distance of several hundred yards , is aligned with these sights of the rifle , it is ...
... eye along the bottom of a notch in the backsight in the direction of the projecting top of the foresight , which ... bull's - eye of a target at a distance of several hundred yards , is aligned with these sights of the rifle , it is ...
Page 53
... bull's - eye of the target which would otherwise reach his eye ; and he learns that his rifle , if its elevation be duly adapted to the distance , is then in the right direction for a missile discharged from it to strike the target . He ...
... bull's - eye of the target which would otherwise reach his eye ; and he learns that his rifle , if its elevation be duly adapted to the distance , is then in the right direction for a missile discharged from it to strike the target . He ...
Page 75
... eye itself , or , in other words , the amount or degree of hypermetropia . Hence the remote point of distinct vision ... bull's - eye of the target at long - range rifle practice , without an amount of accommodatory or muscular strain ...
... eye itself , or , in other words , the amount or degree of hypermetropia . Hence the remote point of distinct vision ... bull's - eye of the target at long - range rifle practice , without an amount of accommodatory or muscular strain ...
Page 178
... eye as well as internal to it , which need not be mentioned here , will also ... Bull's - eyes - Square Test - dots -- Figure Targets for Range Practice ... eye as directed on the card of test - dots furnished for that purpose . ' The ...
... eye as well as internal to it , which need not be mentioned here , will also ... Bull's - eyes - Square Test - dots -- Figure Targets for Range Practice ... eye as directed on the card of test - dots furnished for that purpose . ' The ...
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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