The American encyclopedia and dictionary of ophthalmology Edited by Casey A Wood, assisted by a large staff of collaborators . of the deviating pupil, the amount ofdeviation being read off the perimetric arc. The patient now looksat an object 6 metres distant, and directly in front, and a similarobservation is made. Worth {Ophthalmic Year-Book, 1904, p. 52) also uses the cornealreflex. He employs a deviometer which consists essentiallyof a horizontal arm that can be swung either way, carrying a slidewith a white spot towards which the child is induced to look. Anelectric lamp opposite the pivo
The American encyclopedia and dictionary of ophthalmology Edited by Casey A Wood, assisted by a large staff of collaborators . of the deviating pupil, the amount ofdeviation being read off the perimetric arc. The patient now looksat an object 6 metres distant, and directly in front, and a similarobservation is made. Worth {Ophthalmic Year-Book, 1904, p. 52) also uses the cornealreflex. He employs a deviometer which consists essentiallyof a horizontal arm that can be swung either way, carrying a slidewith a white spot towards which the child is induced to look. Anelectric lamp opposite the pivot of the arm can be flashed on or off, togive the corneal reflex. The surgeon watches the cornea from justabove the electric light, and a tangent scale on the back of the armindicates the amount of deviation. See Examination of the Eye;Muscles, Ocular. Angle of incidence. The angle at which light striking a densermedium becomes reflected or refracted. (See flgure.) ANGLE OF REFLECTION 475 Angle of reflection. The angle which a reflected sound or light-wavemakes with a perpendicular let fall upon the reflecting surface at. The Angles of Eeflection and Incidence. the point of reflection. The angle of reflection is always equal tothe angle of incidence (q. v.). (See figure.)Angle of refraction. The angle made by a refracted ray of light with
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectophthalmology, bookye
