This document provides information on various orthoptic instruments used for diagnostic and therapeutic purposes in treating binocular vision anomalies. It describes the principles, construction, procedures, and uses of several instruments including the diploscope, cherioscope, reading bars, Remy separator, Tibb's binocular trainer, and synoptophore. The diploscope and cherioscope are used to detect suppression and exercise fusion. Reading bars are home exercise devices that use physiological diplopia. The Remy separator and Tibb's trainer are haploscopic instruments used for diagnosis and treatment. The synoptophore can measure deviations, fusion, and stereopsis, and is used to treat suppression and abnormal retinal correspondence.
Synoptophore is an instrument for diagnosing imbalance of eye muscles and treating them by orthoptic methods. In this presentation the parts of the synoptophore and the different slides used in the instrument are discussed
Synoptophore is an instrument for diagnosing imbalance of eye muscles and treating them by orthoptic methods. In this presentation the parts of the synoptophore and the different slides used in the instrument are discussed
Contact lens for congenital aphakia and other eye conditions for infants and toddlers. The slide presentation encompasses indications for CL fitting in paediatric, contact lens options, fitting techniques, challenges and contact lens as myopia control.
Non - surgical treatment of squint i.e. all types of squint have some modalities of treatment [ optical treatment, orthoptic treatment, Prismo-therapy, and pharmacological treatment] except surgical treatment.
1. OPTICAL TREATMENT -
in optical treatment, it should be include correction of refractive error and prismotherapy.
SPECTACLES should be prescribed in every cases.
It may correct to squint partially or completely.
IN PRISMOTHERAPY, for correction of squint, This is light weight, and easy to apply on the back surface of glass.
It is useful in heterophoria, nystagmus, convergence insufficiency, managing diplopia and maintain binocular single vision.
IN PHARMACOLOGICAL TREATMENT, miotics, atropine and botulinum toxin are prescribed in some types of cases of strabismus.
IN ORTHOPTIC TREATMENT, means straight eyes.
It is used as a diagnostic purpose and therapeutic purposes.
- to increase fusion amplitude.
- anti suppression exercises.
- treatment of amblyopia.
- treatment of abnormal retinal correspondance.
- to control deviations.
ORDER OF ORHOPTIC TREATMENT -
. amblyopia is treated firstly.
. anti- suppression therapy.
- diplopia training.
- amplitude improvement.
Contact lens for congenital aphakia and other eye conditions for infants and toddlers. The slide presentation encompasses indications for CL fitting in paediatric, contact lens options, fitting techniques, challenges and contact lens as myopia control.
Non - surgical treatment of squint i.e. all types of squint have some modalities of treatment [ optical treatment, orthoptic treatment, Prismo-therapy, and pharmacological treatment] except surgical treatment.
1. OPTICAL TREATMENT -
in optical treatment, it should be include correction of refractive error and prismotherapy.
SPECTACLES should be prescribed in every cases.
It may correct to squint partially or completely.
IN PRISMOTHERAPY, for correction of squint, This is light weight, and easy to apply on the back surface of glass.
It is useful in heterophoria, nystagmus, convergence insufficiency, managing diplopia and maintain binocular single vision.
IN PHARMACOLOGICAL TREATMENT, miotics, atropine and botulinum toxin are prescribed in some types of cases of strabismus.
IN ORTHOPTIC TREATMENT, means straight eyes.
It is used as a diagnostic purpose and therapeutic purposes.
- to increase fusion amplitude.
- anti suppression exercises.
- treatment of amblyopia.
- treatment of abnormal retinal correspondance.
- to control deviations.
ORDER OF ORHOPTIC TREATMENT -
. amblyopia is treated firstly.
. anti- suppression therapy.
- diplopia training.
- amplitude improvement.
Maddox Rod
Use of Maddox Rod
Method of Assessment MR
Double MR Test procedure
Recording procedure of MR Test
Heterophoria, Cyclophoria, Esophoria,Exophoria,Hyperphoria,Hypophoria
What are the tests for binocular vision?
During a Binocular Vision Assessment, the eye doctor evaluates both binocular vision functioning and visual perceptual skills:
Accommodation.
Convergence.
Depth perception (3D)
Fusion.
Ocular motility.
Ocular posture.
Presence of conditions that affect binocular vision functioning.
Spatial awareness / planning.
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Resources: Provide contact information and links for further support.
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2. The orthoptic instruments are required for diagnostic, therapeutic or both purposes.
1. Diagnostic uses of orthoptic instruments :
a) Measurement of angle of deviation ( subjective & objective).
b) Measurement of range of fusion.
c) Measurement of AC/A ratio.
d) To determine sensory status of binocular vision & sensory anomalies such as
suppression , amblyopia & ARC.
e) To evaluate stereoacuity.
3. 2. Therapeutic uses of orthoptic instruments :
a) Exercise to improve the fusional range.
b) Exercise to improve the relative convergence or relative accommodation.
c) Anti – suppression exercise
d) Amblyopia therapy.
4. 2)DIPLOSCOPE :
Principle:
The septum dissociates the two eyes in such a way that each eye can see only two of the three
letters in the white card and only one of the two coloured squares. The left eye sees the letter OG
and the lower red square , while right eye sees the letter DO & upper green square.
5. Construction :
Consist of metal shaft 25 cm long.
Small metal pad called “face piece” is located at one end & card holder at one end.
White card printed with D O G is placed in card holder.
Green square placed centrally above O and red square centrally below.
Metal septum is placed parallel at 6.5cm from card.
Four apertures are provided in metal septum.
6. Two horizontal apertures of 8mm diameter are at equidistance from center of shaft & are 15mm
apart.
One of the vertical aperture is below the left side aperture.
Other vertical aperture is above the right side aperture.
7. Position 1 :
Instructed to look through 2 central holes.
Letter D , O are visible to right and O ,G to left .
If D O G is seen , indicates eyes are in a normal position.
8. Position 2 :
Instructed to look at point between two horizontal holes.
When the patient’s eye converge in this point , the image of O no longer fall on both fovea , but on
a retinal element nasal to the fovea in each eye.
Consequently , the O will seen in uncrossed diplopia & the patient sees DO & OG.
When patient exerts more amount of convergence , patient will see only DG because D , O & G , O
will overlap.
9. Position 3 :
Instructed to look at object held half way between septum and his eye.
When patient eye converges on this point , the image of D & O in the right eye & G & O in the left
eye fall on a retinal elements nasal to fovea in each eye & thus projected temporally, and the
patient will see ODGO on the card.
10. Position 4 :
Instructed to look at a distance object and slightly above printed card.
Image seen by each are projected in crossed way.
Useful in convergent squint to teach in placing visual axis in divergent position.
In intermittent divergent squint to keep 4 letters equidistant from each other.
Positions 1 , 2 , 3 requires convergence of increasing amount.
Position 4 requires relative divergence relative to printed card.
11. Uses of Diploscope :
Suppression & the presence of lack of binocular vision can be detected.
The main use of the instrument is to exercise for relative convergence , when binocular single
vision is present.
For normal position of the eyes:
12. 2) CHERIOSCOPE :
Principle :
Patient hand reinforces the stimulus for suppressing hand.
Normal retinal correspondence is required.
13. Construction :
Consists of working base .
Vertical picture carrier on the side.
Two eyepieces of + 7.00 Ds are mounted on the stand at distance of + 14cm from base.
Oblique , till able mirror is provided as a septum.
14. Procedure :
The picture is placed in a picture carrier & a sheet of paper on the base of the instrument.
The patient should look with his fixating eye into the mirror & with the suppressing eye on the
paper.
Patient is instructed to trace the picture on the paper using a pencil.
Steady fixation of the picture should be stressed to prevent rapid alteration , which can be
suspected , if the patient drawing is smaller or larger than the picture or if the picture are
missing.
16. 3) READING BARS :
Reading bars are simple devices used to train the patient for subjectively controlling the
maintenance of binocular vision.
Principle :
• Based on the principle of physiological diplopia.
It includes :
o Thumb bar reader .
o Zig –zag bar reader.
o Mayan bar reader.
o Jaual grid.
o tibb ‘s physiologic diplopia reader.
17. Procedure :
Patient is made aware of physiological diplopia by introducing bar between patient eye and
reading material.
As the patient read the print binocularly he perceives the bar in crossed diplopia .
Each image of bar hiding on position of the print from one eye , but not the other , so that the
print can be read normally.
Maintenance of correct position of the eye despites of the obstacles will strengthen the binocular
single vision.
This is very useful & home exercise.
18. 4) REMY SEPERATOR :
Consists of septum with a handle having a transparent slide holder at one end and a nose piece at
other end.
The patient resting on the septum is instructed to look through the slides at an object beyond
them.
If the patient eye is focusing nicely by the retina of the both eye then we will see superimposed
picture by the patient.
Uses :
19. 5) TIBB’S BINOCULAR TRAINER:
It is a haploscopic instrument.
It consist of a middle septum and two wing boards that folds together like a book.
Middle septum has mirror on both sides so that it can be used with either eye fixating.
Each wing board has vertical scale of 20 base up and base down & horizontal scale of 40 base in
and base out .
There are four cards come with instrument and consist of peripheral , macular , and foveal
superimposition and fusional picture.
20. Procedure :
Wing board is placed at an angle to the table.
The vertical wing board is to the right side when right eye is fixating and on the left side when
left eye is fixating.
Patient places the bridge of the nose against the curved part of the septum so that the visual axis
is perpendicular to the table.
Head should not be tilted.
One target carrier should placed in vertical wing board at the zero mark shows in the window .
This target seen in the mirror.
Another target is placed in the horizontal wing board and moves it until the two images are
superimposed . This target is not viewed in the mirror.
21. Uses :
• It can be used for both diagnosis and treatment of suppression and abnormal retinal
correspondence and for increasing fusional amplitude.
22. 6) SYNOPTOPHORE :
It is a haploscopic device.
Consist of two tubes , having a right – angled blend , mounted on a base having a chin rest and a
forehead rest.
Each tube consist of a light source for illumination of a slide and a slide carrier at the outer end.
A reflecting mirror at a right angled bend .
Eyepiece of +6.5D at inner end.
The tubes can be converged and diverged and moved vertically separately or together by means of
knob.
Each slide carrier can be rotated to adjust for any torsion.
The horizontal , vertical and torsional positions of each tube with regard to normal zero position
can be read on scales in either degree or prism diopters.
23. The graduation from zero mark inward represents base out prism or degree of convergence.
From the zero mark outward represents base in prism or degree of divergence.
Synoptophore slides:
Simultaneous perception slides:
a. Simultaneous foveal perception(SFP).
b. Simultaneous macular perception (SMP).
c. Simultaneous paramacular perception ( SPP).
Fusion slides.
Stereoscopic slides.
24. Uses of synoptophore :
A. Diagnostic uses;
a) Measurement of subjective and objective angle of deviation.
b) Measurement of primary and secondary deviation.
c) Measurement of IPD.
d) Estimation of grades of binocular vision.
e) Estimate presence & type of suppression.
f) Measurement of range of fusion or vergence.
g) Measurement of angle Kappa.
B. Therapeutic uses; Used in the treatment of
a) Suppression
b) Abnormal retinal correspondence