
audiobook
by Daniel Woolf
Refraction andMuscular Imbalance
INTRODUCTORY
Chapter I SKI-OPTOMETER CONSTRUCTION
Chapter II CYLINDRICAL LENSES
Chapter III HOW THE SKI-OPTOMETER ASSISTS IN REFRACTION
Chapter IV IMPORTANT POINTS IN CONNECTION WITH THE USE OF THE SKI-OPTOMETER
Chapter V CONDENSED PROCEDURE FOR MAKING SPHERE AND CYLINDER TEST WITH THE SKI-OPTOMETER
Chapter VI MUSCULAR IMBALANCE
Chapter VII THE BINOCULAR MUSCLE TEST
Chapter VIII THE MONOCULAR DUCTION MUSCLE TEST
This practical guide offers eye‑care professionals a clear path to faster, more precise measurements by leveraging the ski‑optometer, a specialised instrument that merges the functions of a traditional trial case into a single, easy‑to‑use device. It begins by outlining the common bottlenecks of conventional refraction work—hand‑switching lenses, tedious manual recording, and the tendency to overlook muscular imbalance—setting the stage for a more streamlined approach. The author then walks readers through the instrument’s construction, from setting the device to plano to selecting spherical and cylindrical lenses with a simple reel turn, complete with annotated diagrams that illustrate each move.
By automating lens selection and automatically registering the final prescription, the ski‑optometer frees practitioners to focus on patient assessment rather than mechanical chores. Whether you already own the device or simply wish to modernise your practice, the book provides a step‑by‑step routine that promises greater efficiency without sacrificing accuracy.
Language
en
Duration
~2 hours (133K characters)
Publisher of text edition
Project Gutenberg
Original publisher
New York: Theodore S. Holbrook, 1921.
Credits
deaurider and the Online Distributed Proofreading Team at https://www.pgdp.net (This file was produced from images generously made available by The Internet Archive)
Release date
2023-08-29
Rights
Public domain in the USA.

1883–1932
An early-20th-century eye specialist, he wrote a practical guide to refraction and muscular imbalance built around the use of the ski-optometer. His surviving work points to a hands-on interest in making vision testing more systematic and easier to use.
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