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. To-day, Ultex Onepiece bifocalsare prescribed because theyunqualifiedly meet the standards of scientific men. They are theperfected bifocal - ground from one single piece of hard, scratch-resisting crown glass, free from color disturbances and invisibleas this word can be applied to any bifocal. Moreover, where prior types of bifocals would require heavy,uncomfortable lenses to fill prescriptions for reading portionsstronger than usual, Ultex Onepiece lenses can be ground tostandard thinness. If yon are not now prescribing Ultex, yen should learn moreabout these bifocals which optical experts and leading profession-al people agree represents the highest type of ophthalmic lens —the product toward which optical science has been struggling forhalf a century. They will pave the way to greater professionalprice — and greater patient satisfaction. Our complete equipment and large stock of blanks enablesus to render the same prompt service on Ultex Onepiecebifocals as on all other mater
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectophthalmology, bookye
