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Related Concept Videos

Muscles of the Eye01:20

Muscles of the Eye

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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.
Extraocular Muscles
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Optical perception, or vision, is an extraordinary sense dependent on converting light signals received via the ocular organs. These organs, known as eyes, are securely positioned within the bony cavities of the skull, called orbits. The orbits serve a dual purpose: a protective shield for the ocular globes and a stable attachment point for the soft ocular tissues. The eye's external protective mechanisms include the eyelids, which are edged with lashes that act as a barrier against foreign...
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Angle-closure glaucoma, or closed-angle glaucoma, is an eye condition where the iris bulges out and blocks the iridocorneal angle, resulting in a buildup of aqueous humor and increased intraocular pressure. Immediate medical attention is necessary due to the sudden onset of symptoms. The treatment for angle-closure glaucoma includes short-term and long-term approaches. Short-term treatment involves using eye drops like pilocarpine to lower intraocular pressure by increasing aqueous humor...
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In open-angle glaucoma, the iridocorneal angle remains open, but the trabecular meshwork becomes stiff, slowing down the outflow of aqueous humor. This causes a buildup of aqueous humor in the anterior chamber, leading to a sudden increase in intraocular pressure. The treatment for open-angle glaucoma focuses on reducing the elevated intraocular pressure by either decreasing the secretion of aqueous humor or increasing its outflow.
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Related Experiment Video

Updated: Jan 1, 2026

Comparison of Three Clinical Stereoscopic Methods for Measuring Binocular Visual Function During Amblyopic Treatment in Unilateral Amblyopia
06:19

Comparison of Three Clinical Stereoscopic Methods for Measuring Binocular Visual Function During Amblyopic Treatment in Unilateral Amblyopia

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Single Muscle Transposition in the Management of Monocular Elevation Deficiency.

Louis J Stevenson1, Sheetal Shirke1, Elaine Y H Wong1

  • 1Ocular Motility Clinic, Royal Victorian Eye and Ear Hospital, East Melbourne, Australia.

Journal of Binocular Vision and Ocular Motility
|December 20, 2019
PubMed
Summary

Single muscle transposition offers a safe and effective surgical option for monocular elevation deficiency. This technique simplifies treatment by avoiding staged operations and reducing complication risks.

Keywords:
Monocular elevation deficiencyamblyopiahypotropiastrabismus

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Area of Science:

  • Ophthalmology
  • Surgical Techniques
  • Strabismus Management

Background:

  • Monocular elevation deficiency (MED) impairs upward eye movement in all gazes.
  • Current treatments like Knapp's procedure have limitations.
  • Hypotropia often accompanies MED, requiring complex management.

Observation:

  • Single muscle transposition is a novel surgical approach for MED.
  • This technique was evaluated in a clinical case study.
  • The procedure allows simultaneous inferior rectus recession.

Findings:

  • Single muscle transposition effectively corrects hypotropia in MED.
  • The technique minimizes the risk of anterior segment ischemia.
  • It provides flexibility for managing associated horizontal deviations.

Implications:

  • Single muscle transposition presents a viable alternative to traditional MED surgeries.
  • This approach can streamline patient treatment pathways.
  • It expands surgical options for complex strabismus cases.