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Chapter 9: Philosophies and Principles of Binocular Vision Therapy

Historical Perspectives

• Ancient Attempts: Various cultures attempted to cure strabismus (crossed eyes) using remedies like exotic ointments, exercises, and masks.

• Medieval Practices: Colored tassel hats were worn, believing they would rectify eye alignment.

• Squint Masks: Sizable eye holes designed to align vision, possibly the first effective treatment for intermittent strabismus.

• Evolution of Therapy: Established principles laid foundations for treating various binocular anomalies with notable success.

Key Contributors to Binocular Therapy

• Louis Emile Javal: Considered the "father of orthoptics"; developed exercises instead of surgery for strabismus. Focused on:

  • Equalizing vision in both eyes with spectacles.

  • Treating amblyopia via occlusion and recognizing suppression's role in strabismus.

  • Use of stereoscopes for antisuppression training.

• Claud Worth: Proposed that poor sensory fusion leads to strabismus. Advocated early treatment and developed the amblyoscope for fusion training.

  • Believed fusion ability is primarily developed by age six; early intervention improves outcomes.

• Ernest Maddox: Integrated surgical and orthoptic treatments; established clinics for pre- and post-surgical vision training.

Modern Perspectives in Binocular Vision Therapy

• Optometric Vision Therapy: Shifted from merely focusing on clarity of vision to managing binocular dysfunctions through training techniques.

• Vision Training Concepts: Techniques evolved for management of binocular anomalies, enhancing visual skills and performance.

• Skeffington's Influence: Introduced a holistic perspective on vision, emphasizing environmental impacts and visual efficiency.

Principles of Vision Therapy

Sequence of Therapy

• Address sensory obstacles (refractive errors) before motor deficits in strabismus management.

• Generally improves monocular issues (like amblyopia) before progressing to binocular techniques.

• Include appropriate visual enhancement techniques after achieving acceptable acuity levels.

Methods of Vergence Training

• Sliding, Stepping, Tromboning, Jumping, Isometric

  • These methods aim to improve vergence ranges, accuracy, and speed of responses in various stages of binocular deficiency treatment.

Office vs. Home Training

• A combination of both is optimal, with office training providing more effective supervision for severe conditions.

• Home training ideally involves engaging multiple techniques to maintain motivation and consistency.

Patient Motivation

• Building rapport and effective communication are critical in encouraging compliance in vision therapy.

• Use of rewards can enhance motivation. Activities incorporated into training should be enjoyable, targeting the child's interests.

Monitoring Progress

• Continuous feedback is essential for gauging therapy effectiveness. Home training logs should be maintained for reflection on progress.

• Assess motivation levels, with necessary modifications made to strategies based on individual responses and experiences.

Retainer Home Training

• Post-therapy, patients should implement home techniques to monitor and sustain skills, preventing regression over time.

• Regular assessment and re-engagement in training techniques are recommended to maintain visual performance.