In a word, the Ski-optometer is practically an automatic trial-case, bearing the same relation to the refracting room as the accepted labor and time-saving devices of the day bear to the commercial world.
The present volume has accordingly been published, not alone in the interest of those possessing a Ski-optometer, but also for those interested in attaining the highest point of efficiency in the work of refraction and muscular imbalance.
Ski-optometer Lens Battery (almost actual size)
showing how sphere and cylinder lenses are procured.
After obtaining FINAL results, your prescription is automatically registered,
ALL READY for you to transcribe.
Fig. 1—The three time-saving moves necessary in the operation of the Ski-optometer.
Chapter I
SKI-OPTOMETER CONSTRUCTION
A far better understanding of the instrument will be secured if the refractionist possessing a Ski-optometer will place it before him, working out each operation and experiment step by step in its proper routine.
The three moves as outlined in [Fig. 1] should first be thoughtfully studied and the method of obtaining the spheres and cylinders carefully observed.
