Instant Download Acsms Exercise Management For Persons With Chronic Diseases and Disabilities 4th Edition Ebook PDF Version PDF FREE
Instant Download Acsms Exercise Management For Persons With Chronic Diseases and Disabilities 4th Edition Ebook PDF Version PDF FREE
Instant Download Acsms Exercise Management For Persons With Chronic Diseases and Disabilities 4th Edition Ebook PDF Version PDF FREE
Language: English
Refraction and
Muscular Imbalance
As Simplified Through the Use
of the Ski-optometer
By
DANIEL WOOLF
WOOLF INSTRUMENT CORPORATION
New York: 516 Fifth Avenue
Copyright 1921
By WOOLF INSTRUMENT CORPORATION
Published by
Theodore S. Holbrook
New York
CONTENTS
Page
Chapter I
Ski-optometer Construction 1
Convex Spherical Lenses 2
Operates and Indicates Automatically 6
Concave Spherical Lenses 7
Chapter II
Cylindrical Lenses 10
Obtaining Correct Focus 11
Why Concave Cylinders Are Used Exclusively 14
Transposition of Lenses 14
Chapter III
How the Ski-optometer Assists in Refraction 17
The Use of the Ski-optometer in Skioscopy 17
A Simplified Skioscopic Method 20
Employing Spheres and Cylinders in Skioscopy 22
Use of the Ski-optometer in Subjective Testing 23
A Simplified Subjective Method 24
Procedure for Using Minus Cylinders Exclusively 26
Constant Attention Not Required 29
Chapter IV
Important Points in Connection with the
Use of the Ski-optometer 30
Elimination of Trial-Frame Discomfort 30
Rigidity of Construction 31
How to Place the Ski-optometer in Position 32
Cleaning the Lenses 33
Accuracy Assured in Every Test 34
Built to Last a Lifetime 35
Chapter V
Condensed Procedure for Making Sphere and
Cylinder Test with the Ski-optometer 37
Subjective Distance Test 37
Subjective Reading Test 40
Chapter VI
Muscular Imbalance 41
The Action of Prisms 42
The Phorometer 43
The Maddox Rod 44
Procedure for Making the Muscle Test 45
Binocular and Monocular Test 47
Chapter VII
The Binocular Muscle Test 48
Made with the Maddox Rod and Phorometer 48
Esophoria and Exophoria 50
Making Muscle Test Before and After Optical Correction 52
When to Consider Correction of Muscular Imbalance 53
Four Methods for Correction of Muscular Imbalance 54
The Rotary Prism 54
Use of the Rotary Prism in Binocular Muscle Tests 56
Chapter VIII
The Monocular Duction Muscle Test 58
Made with Both Rotary Prisms 58
Locating the Faulty Muscle 58
Adduction 59
Abduction 61
Superduction 62
Subduction 63
Procedure for Monocular Muscle Testing 64
Diagnosing a Specific Muscle Case 65
Chapter IX
First Method of Treatment—Optical Correction 70
Esophoria 70
Treatment for Correcting Esophoria in Children 72
How Optical Correction Tends to Decrease 6°
Esophoria in a Child 74
Chapter X
Second Method of Treatment—Muscular Exercise 75
Made with Two Rotary Prisms and Red Maddox Rod 75
Exophoria 75
An Assumed Case 78
Effect of Muscular Exercise 80
Home Treatment for Muscular Exercise—
Square Prism Set Used in Conjunction with
the Ski-optometer 82
Chapter XI
Third Method of Treatment—Prism Lenses 84
When and How Employed 84
Prism Reduction Method 85
Chapter XII
A Condensation of Previous Chapters on the Procedure
for Muscle Testing with the Ski-optometer 87
Four Methods of Treating an Imbalance Case when
the Preceding One Fails 90
Prisms 92
Cyclophoria 92
Chapter XIII
Cyclophoria 93
Made with Maddox Rods and Rotary Prisms 93
Chapter XIV
Cycloduction Test 99
Made with the Combined Use of the Two Maddox Rods 99
Treatment for Cyclophoria 102
Chapter XV
Movements of the Eyeballs and their Anomalies 105
Monocular Fixation 105
Binocular Fixation 106
Orthophoria 107
Heterophoria 107
Squint 108
Varieties of Heterophoria and Squint 109
Chapter XVI
Law of Projection 114
Suppression of Image 115
Monocular Diplopia 115
Table of Diplopia 116
Movement of Each Eye Singly 117
Subsidiary Actions 118
Field of Action of Muscles 120
Direction of the Gaze 120
Primary Position—Field of Fixation 121
Binocular Movements 121
Parallel Movements 122
Lateral Rotators 123
Eye Associates 124
Movements of Convergence 125
Movements of Divergence 125
Vertical Divergence 126
Orthophoria 126
Heterophoria 126
Subdivisions 126
Chapter XVII
Symptoms of Heterophoria 128
Treatment 130
Destrophoria and Laevophoria 132
The demands of the day for maximum efficiency in
the refracting world are largely accountable for the
inception, continuous improvement and ultimate
development of the master model Ski-optometer.
The present volume, dealing with the instrument’s
distinctive operative features, has been prepared not
only for Ski-optometer users, but also for those
interested in the simplification of refraction and
muscular imbalance.
The author is indebted for invaluable counsel, to
W
hile in a measure the conventional trial-case still serves its
purpose, so much of the refractionist’s time is consumed
through the mechanical process of individually transferring the
trial-case spheres and cylinder lenses, that far too little thought is
given to muscular imbalance, notwithstanding its importance in all
refraction cases.
Dr. Samuel Theibold, of Johns Hopkins University, in a recent
address before the American Medical Association, stated that the
average refractionist was inclined to devote an excess of time to
general refraction, completely overlooking the important test and
correction of muscular imbalance. If the latter is to be at all
considered, general refraction must be simplified—without impairing
its accuracy—a result that is greatly facilitated through the use of the
Ski-optometer.
One must admit that tediously selecting the required trial-case
lens—whether sphere, cylinder or prism—watching the stamped
number on the handle—continual wiping and inserting each
individual lens in a trial-frame is a time-consuming practise. This is
readily overcome, however, through the employment of the Ski-
optometer.
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.
Fig. 2—To Obtain Plano.
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 or “plano,” a position
indicated by the appearance of the three “0 0 0” at the spherical
register, in conjunction with one “0” or zero, for the cylinder at its
register, marked “CC Cyl.”
After this move, the supplementary disk’s pointer should be set at
“open” (Fig. 2).
Fig. 3—To obtain sphericals, turn this
Single Reel as shown by dotted finger. This
assures an automatic and simultaneous
registration at sphere indicator of focus of
lens appearing at sight opening.