Journal of ophthalmology, otology and laryngology . Price$ It consists of a chart I4x14 with a silica or blackboardsurface on which the conventional perimetric diagram is crayons are used to mark field limitations directly on thechart. Red, blue, green and white color objects each in two sizesare supplied with each instrument. The chart is held by the patient and the proper distance is main-tained by means of a metal quadrant, the extremity of wh;ch restsjust below the eye. The apparatus is dismountable to go into a box 14x14x1^ inches. Being portable it can be used wherev
Journal of ophthalmology, otology and laryngology . Price$ It consists of a chart I4x14 with a silica or blackboardsurface on which the conventional perimetric diagram is crayons are used to mark field limitations directly on thechart. Red, blue, green and white color objects each in two sizesare supplied with each instrument. The chart is held by the patient and the proper distance is main-tained by means of a metal quadrant, the extremity of wh;ch restsjust below the eye. The apparatus is dismountable to go into a box 14x14x1^ inches. Being portable it can be used wherever good light is obtainable,and at the prescribed distance determination of difference of colorvalues is more accurate. The Hailz Charts for use with stereoscope. Fixation secured with good eye where central fieldin volvenieut of eye under examination makes fixation difficult. Price $ per set. SPECIALISTS INSTRUMENTS520 5th AVENUE NEW YORK
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectophthalmology, bookye
