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Related Concept Videos

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The muscles of the eye are sophisticated structures that control eye movement and focus, allowing for the precise and rapid adjustments necessary for vision. The human eye is controlled by ten muscles — six extraocular muscles, three intraocular muscles, and one primary eyelid retractor muscle.
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Surgical Correction for Pediatric Epiblepharon and Trichiasis
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[Induced Incomitance of one Muscle Strabismus Surgery in Comparison to Unilateral Recess-Resect Procedures].

N J Gross1, H Link1, J Biermann1

  • 1Klinik für Augenheilkunde, Universitätsklinikum Freiburg.

Klinische Monatsblatter Fur Augenheilkunde
|October 30, 2015
PubMed
Summary
This summary is machine-generated.

One muscle surgery for intermediate squint is viable, inducing minimal incomitance and few visual disturbances. Unilateral recess-resect procedures also show comparable safety and efficacy in strabismus correction.

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Area of Science:

  • Ophthalmology
  • Strabismus Surgery
  • Binocular Vision

Background:

  • Surgical correction of intermediate squint angles can involve single muscle procedures or unilateral recess-resect operations.
  • Systematic measurement of induced incomitance and potential visual disturbances after these procedures is lacking.

Purpose of the Study:

  • To systematically measure induced incomitance after one muscle surgery versus unilateral recess-resect procedures for intermediate squint.
  • To assess the impact of induced incomitance on visual disturbances.

Main Methods:

  • 31 patients underwent one extraocular eye muscle surgery; 30 had a unilateral recess-resect procedure for strabismus.
  • Latent squint angles were measured preoperatively and three months postoperatively using a tangent screen across a 60° horizontal gaze range.
  • Induced incomitance was calculated, and patient-reported double vision was assessed.

Main Results:

  • One muscle surgery induced 1.7°-3.8° incomitance across gaze ranges; recess-resect procedures induced 1.4°-3.4°.
  • A significant correlation between surgical dose and incomitance was observed in one muscle surgery for 40° and 60° gaze ranges.
  • 16% of patients after one muscle surgery and 10% after recess-resect surgery reported double vision (p>0.05).

Conclusions:

  • One muscle surgery is a safe and effective option for correcting small to intermediate angles of squint.
  • The induced incomitance is generally small and does not cause significant visual disturbances, particularly in central gaze.
  • Both surgical approaches demonstrate comparable outcomes regarding induced incomitance and patient-reported double vision.