A Compend of the diseases of the eyeP. Blakiston, son, 1886 - 148 pages |
From inside the book
Results 1-5 of 17
Page 4
... focus more speedily after emerging from the positive spherical lens , if the lens be thickened at the centre , or if ... Focus of that lens . If the object be a point situated at a distance nearer than twenty feet , it is clear that the ...
... focus more speedily after emerging from the positive spherical lens , if the lens be thickened at the centre , or if ... Focus of that lens . If the object be a point situated at a distance nearer than twenty feet , it is clear that the ...
Page 5
... focus are rendered parallel by their passage through the lens , and rays from within the distance of the principal focus emerge still divergent , while rays from beyond the principal focus are rendered convergent . These definitions are ...
... focus are rendered parallel by their passage through the lens , and rays from within the distance of the principal focus emerge still divergent , while rays from beyond the principal focus are rendered convergent . These definitions are ...
Page 6
... focus was wholly dependent upon the position of the visible object ; if this at a point , say 20 feet away , brought the rays together at the principal focus , which for brevity's sake let us call the retina , then , upon approaching ...
... focus was wholly dependent upon the position of the visible object ; if this at a point , say 20 feet away , brought the rays together at the principal focus , which for brevity's sake let us call the retina , then , upon approaching ...
Page 8
... focus be imagined in front of the retina , the rays will cross and produce similar diffusion circles and indis ... focus , shown in Fig . 9 , H , and this condition is called Hyperopia ; 2. The retina may be behind the focus , Fig . 9 ...
... focus be imagined in front of the retina , the rays will cross and produce similar diffusion circles and indis ... focus , shown in Fig . 9 , H , and this condition is called Hyperopia ; 2. The retina may be behind the focus , Fig . 9 ...
Page 14
... focus more speedily after emerging from the positive spherical lens , if the lens be thickened at the centre , or if ... Focus of that lens . If the object be a point situated at a distance nearer than twenty feet , it is clear that the ...
... focus more speedily after emerging from the positive spherical lens , if the lens be thickened at the centre , or if ... Focus of that lens . If the object be a point situated at a distance nearer than twenty feet , it is clear that the ...
Common terms and phrases
accommodation acuity advisable amblyopia Aquæ destillatæ asthenopia Astigmatism atropia bandage blepharitis blindness called capsule cataract cause centre Chemistry choroiditis ciliary body ciliary muscle Clinical Cloth color Compend condition conjunctiva convergent cornea degrees Diagnosis dioptric discission disease distance divergent ectropion edge Edition effect focal forceps foreign body frequent fundus give glass glaucoma globe hemorrhage Hyperopia Illus Illustrations incision inflammation intraocular iridectomy iris iritis knife lachrymation Leather lens lenses lesion light Manual Medical College meridian mydriatic Myopia needle normal object ocular opacity operation Ophthalmia ophthalmic ophthalmoscope optic nerve orbit palpebral papilla pathological patient physician Physiology posterior practical Presbyopia pressure principal focus produce Prof Professor prognosis pupil Quiz-Compends refractive errors refractive power result retina Retinoscopy scissors sclerotic skin SNOWDEN spectacles staphyloma strabismus student sulphatis suppurative surgeon surgical symptoms syphilis tension text-books tissues treatment tumor ulcer vision visual vitreous wound
Popular passages
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