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Related Concept Videos

Accessory Structures of the Eye01:17

Accessory Structures of the Eye

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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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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The craniofacial muscles are a collection of approximately 20 thin skeletal muscles situated beneath the skin of the face and scalp. These muscles, primarily responsible for the vast array of human facial expressions, originate from the bones or fibrous structures of the skull and extend outwards to connect with the skin. While most skeletal muscles in the body are enveloped in thick fascia, facial muscles generally have a more delicate fascial covering, with the buccinator muscle being a...

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Surgical Correction for Pediatric Epiblepharon and Trichiasis
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[Decrease of upper eyelid levator muscle function after involutional ptosis and dermatochalasis surgery].

Eliana Forno1, Eurípedes da Mota Moura, Suzana Matayoshi

  • 1Faculdade de Medicina da Universidade de São Paulo - São Paulo (SP) - Brasil.

Arquivos Brasileiros De Oftalmologia
|January 27, 2009
PubMed
Summary

Ptosis surgery reduces upper eyelid levator muscle function, with eyelid crease height decreasing and margin reflex distance increasing post-operation. These changes were consistent between eyes.

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Area of Science:

  • Ophthalmology
  • Surgical Techniques
  • Eyelid Anatomy

Context:

  • Blepharoptosis and dermatochalasis are common eyelid conditions.
  • Surgical correction aims to improve eyelid function and aesthetics.
  • Understanding functional changes post-surgery is crucial for patient outcomes.

Purpose:

  • To evaluate changes in upper eyelid levator muscle function (UELMF), margin reflex distance (MDR1), and eyelid crease height (ECH).
  • To compare these measures before and after ptosis and dermatochalasis surgery.

Summary:

  • Forty-four patients underwent ptosis and dermatochalasis surgery.
  • Post-surgery, UELMF decreased by 1.1 mm, MDR1 increased by 1.6 mm, and ECH decreased by 3.97 mm.
  • Significant correlations were observed between both eyes for all measured eyelid variables.

Impact:

  • Ptosis surgery leads to a decrease in upper eyelid levator muscle function.
  • Surgical outcomes demonstrate predictable changes in eyelid position and height.
  • Findings provide insights into functional alterations following eyelid reconstructive surgery.