. Refraction and muscular imbalance, as simplified through the use of the ski-optometer. CylindersRegister Here 1st—Turn this Single Reel to obtain all yourspherical lenses, whether convex or concave. 2nd—Set this axis indicator, which automat-ically positions each cylinder lens at the axisdesignated. 3rd—Then merely turn this Single Reel toobtain your various cylinder lens strengths atthat axis. After obtainingFINAL results,your prescription isautomatically re-gistered, ALLREADY for youto transcribe. Fig. 1—The three time-saving moves necessary in theoperation of the Ski-optometer. Chapter IS
. Refraction and muscular imbalance, as simplified through the use of the ski-optometer. CylindersRegister Here 1st—Turn this Single Reel to obtain all yourspherical lenses, whether convex or concave. 2nd—Set this axis indicator, which automat-ically positions each cylinder lens at the axisdesignated. 3rd—Then merely turn this Single Reel toobtain your various cylinder lens strengths atthat axis. After obtainingFINAL results,your prescription isautomatically re-gistered, ALLREADY for youto transcribe. Fig. 1—The three time-saving moves necessary in theoperation of the Ski-optometer. Chapter ISKI-OPTOMETER CONSTRUCTION A FAR better understanding of the instru-ment will be secured if the refractionistpossessing a Ski-optometer will place it beforehim, working out each operation and experi-ment step by step in its proper routine. The three moves as outlined in Fig. 1 shouldfirst be thoughtfully studied and the method ofobtaining the spheres and cylinders Fig. 2—To Obtain Piano. 1—Set spherical indicator at 000 as illustrated above. 2—Set cylinder indicator to 0. 3—Set pointer of supplementary disk at open. The instrument should then be set at zero orpiano, a position indicated by the appear- [1] Refraction and Muscular Imbalance ance of the three ^o o o at the sphericalregister, in conjunction with one ^o, or zero,for the cylinder at its register, marked ^CCCyl. After this move, the supplementary diskspointer should be set at open (Fig. 2).
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