A Manual of Ophthalmic Practice |
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Page 1
... to the surface , separating the two media , it is not deflected but continues its course in a right line . * Ninth Edition , translated by E. Atkinson , Ph.D. B The incident ray being represented by SO ( Fig . OPTICAL AND GENERAL OUTLINES.
... to the surface , separating the two media , it is not deflected but continues its course in a right line . * Ninth Edition , translated by E. Atkinson , Ph.D. B The incident ray being represented by SO ( Fig . OPTICAL AND GENERAL OUTLINES.
Page 2
... line perpendicular to the surface separating the two media ( AB in diagram ) . surfaces . But when light traverses media the surfaces of. TRANSMISSION OF LIGHT THROUGH TRANSPARENT MEDIA . FIG . 17. - Conjunctival congestion ( engorgement ...
... line perpendicular to the surface separating the two media ( AB in diagram ) . surfaces . But when light traverses media the surfaces of. TRANSMISSION OF LIGHT THROUGH TRANSPARENT MEDIA . FIG . 17. - Conjunctival congestion ( engorgement ...
Page 5
... line which passes through these two centres is the principal axis . In considering the path of rays through lenses , we may compare them with prisms ; the convex ABC may be looked upon as a succession of prisms having their summits ...
... line which passes through these two centres is the principal axis . In considering the path of rays through lenses , we may compare them with prisms ; the convex ABC may be looked upon as a succession of prisms having their summits ...
Page 10
... lines , it will be granted that the refracted ray KA A'K ' is propa- gated in a medium with parallel faces . Hence a ... line cuts the principal axis is , therefore , the optical centre . Every right line PP ' ( Fig . 11 ) which P. C P ...
... lines , it will be granted that the refracted ray KA A'K ' is propa- gated in a medium with parallel faces . Hence a ... line cuts the principal axis is , therefore , the optical centre . Every right line PP ' ( Fig . 11 ) which P. C P ...
Page 15
... line and visual angle . The former signi- fies an imaginary line drawn from the yellow spot to the centre of the object looked at ; the latter is the angle formed by two secondary axes drawn from what is known as the optical or more ...
... line and visual angle . The former signi- fies an imaginary line drawn from the yellow spot to the centre of the object looked at ; the latter is the angle formed by two secondary axes drawn from what is known as the optical or more ...
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Common terms and phrases
accommodation affected amblyopia anomaly of refraction anterior chamber appear asthenopia astigmatism atrophy atropine axis bandage become blood cataract cause centre chamber choroid ciliary region colour commenced concave lens congenital conjunctiva convergence convex lens cornea corneal margin corneitis curette curvature degree of myopia dilated dioptric direction disease displacement distance emmetropic examination extraction eyeball eyelids forceps foreign body fundus glasses glaucoma globe hæmorrhage horizontal hypermetropia hypermetropic astigmatism incision increased inflammation inflammatory injury intolerance of light iridectomy iris iritis keratitis knife lachrymal lenses less lids lines lint lotion muscle myopia object occur ocular opacity opaque operation ophthalmia ophthalmoscope optic disc orbit pain paralysis passed patient performed portion posterior presbyopia pupil rays of light removed retina retinal vessels right angles scissors sclerotic seen sight spots staphyloma strabismus suppuration surface sutures sympathetic ophthalmia symptoms synechia syphilitic tension tion treatment tumour ulceration usually vitreous wire speculum wound
Popular passages
Page 318 - Walsham, besides being an excellent surgeon, is a teacher in its best sense, and having had very great experience in the preparation of candidates for examination, and their subsequent professional career, may be relied upon to have carried out his work successfully. Without following out in detail his arrangement, which is excellent, we can at once say that his book is an embodiment of modern ideas neatly strung together, with an amount of careful organisation well suited to the candidate, and,...