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A and V Pattern Strabismus: Aetiology and Clinical Presentation Study Guide

This guide details the surgical approaches for V-pattern and A-pattern strabismus. It covers fundamental principles, specific techniques for managing oblique and horizontal muscle imbalances, advanced methods like slanting muscle insertions, and discusses potential risks and complications. The content is suitable for educational purposes, explaining the diagnostic framework and surgical decision-making processes involved in correcting these eye conditions.

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Ophthalmology: Strabismus

Alphabet Patterns in Strabismus: Definition and Classification

Defines and classifies alphabet patterns in strabismus, including V and A patterns, their physiological and pathological variations, and their nomenclature based on primary deviation.

  • Alphabet patterns
  • Strabismus
  • Horizontal deviation
  • Vertical gaze
  • V pattern
  • A pattern
  • Esotropia
  • Exotropia
  • Prism diopters
  • Physiological V pattern
  • Pathological V pattern
  • Pathological A pattern

Aetiology and Management of Alphabet Patterns

A and V Pattern Strabismus Aetiology

This document discusses the prevalence, aetiology, and muscle actions associated with A and V patterns in horizontal strabismus.

  • A and V patterns
  • horizontal strabismus
  • superior oblique muscle actions
  • inferior oblique muscle actions
  • oblique muscle function
  • vertical muscle function
  • muscle insertion positions
  • sagittalisation
  • muscle pulleys
  • palpebral fissures
  • craniosynostosis
  • esotropia
  • exotropia
  • extraocular muscle dysfunction

Investigation and Management of Alphabet Patterns

Investigation and management of pathological alphabet patterns including V pattern and A pattern aetiology and diagnostic tests.

  • Alphabet patterns
  • V pattern
  • A pattern
  • Aetiology
  • Elevators
  • Depressors
  • Relative divergence
  • Relative convergence
  • Diagnostic tests
  • Ocular alignment
  • Binocular single vision (BSV)
  • Strabismus surgery

Surgical Management of Alphabet Pattern Strabismus

Surgical Management of Alphabet Pattern Strabismus

Surgical options and principles for managing A and V pattern strabismus involving oblique and horizontal muscle interventions.

  • V pattern with IO over-action
  • A pattern with SO over-action
  • A pattern with SR over-action
  • IO recession
  • IO myectomy
  • Anterior transposition of IO
  • SO posterior tenectomy
  • SO posterior tenotomy
  • SO z-tenotomy
  • SO split lengthening
  • SO tendon spacer
  • Bilateral SR recession
  • Transposition of horizontal muscles
  • Slanting of muscle insertions
  • Vertical muscle over-action
  • Vertical muscle under-action

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