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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...
Anatomy of the Eyeball01:20

Anatomy of the Eyeball

The eye is a spherical, hollow structure composed of three tissue layers. The outer layer — the fibrous tunic, comprises the sclera — a white structure — and the cornea, which is transparent. The sclera encompasses some of the ocular surface, most of which is not visible. However, the 'white of the eye' is distinctively visible in humans compared to other species. The cornea, a clear covering at the front of the eye, enables light penetration. The eye's middle layer, the vascular tunic,...
Muscles of the Eye01:20

Muscles of the Eye

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
The six extraocular muscles surround the eyeball and control its movements. They are responsible for a wide range of eye motions, including looking up, down, left, right, and rotating...
Microbiome of the Eye01:22

Microbiome of the Eye

The human eye has a specialized microbiota that reflects its unique anatomical and immunological environment. This low-biomass microbial community predominantly colonizes the conjunctiva and eyelid margins, playing a vital role in ocular surface homeostasis and defense. Despite its proximity to the richly colonized facial skin, the ocular surface maintains a distinct microbial profile due to continuous mechanical and biochemical defense mechanisms.The conjunctival surface hosts fewer microbial...
Cranial Bones: Lateral View01:27

Cranial Bones: Lateral View

The lateral view of the cranium is dominated by temporal, sphenoid, and ethmoid bones.
The temporal bone forms the lower lateral side of the skull. The temporal bone is subdivided into several regions. The flattened upper portion is the squamous portion of the temporal bone. Below this area and projecting anteriorly is the zygomatic process of the temporal bone, which forms the posterior portion of the zygomatic arch. Posteriorly is the mastoid portion of the temporal bone. Projecting...
Cranial Bones: Superior and Posterior View01:14

Cranial Bones: Superior and Posterior View

The superior view of the cranium shows the frontal and paired parietal bones.
The frontal bone is the single bone that forms the forehead. At its anterior midline, between the eyebrows, there is a slight depression called the glabella. The frontal bone also forms the supraorbital margin of the orbit. Near the middle of this margin is the supraorbital foramen, the opening that provides passage for a sensory nerve to the forehead. The frontal bone is thickened just above each supraorbital margin,...

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Related Experiment Video

Updated: May 16, 2026

Isolation of Intact Eyeball to Obtain Integral Ocular Surface Tissue for Histological Examination and Immunohistochemistry
05:15

Isolation of Intact Eyeball to Obtain Integral Ocular Surface Tissue for Histological Examination and Immunohistochemistry

Published on: October 20, 2019

The brow-eyelid continuum: an anatomic perspective.

Vincent B Lam1, Craig N Czyz, Allan E Wulc

  • 1Department of Ophthalmology, Drexel University College of Medicine, Philadelphia, PA, USA.

Clinics in Plastic Surgery
|November 29, 2012
PubMed
Summary

Upper eyelid surgery requires considering the entire upper face as a unit, known as the brow-eyelid continuum. Understanding this interconnectedness is crucial for achieving optimal aesthetic outcomes in facial rejuvenation.

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Isolation of Intact Eyeball to Obtain Integral Ocular Surface Tissue for Histological Examination and Immunohistochemistry
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Area of Science:

  • Plastic surgery
  • Facial aesthetics
  • Ophthalmology

Background:

  • Upper eyelid surgery is a common procedure.
  • Aesthetic outcomes depend on the entire upper facial region.
  • The brow-eyelid continuum is a key concept.

Purpose of the Study:

  • To discuss the brow-eyelid continuum in upper eyelid surgery.
  • To highlight the importance of evaluating the upper third of the face as a unit.
  • To review aesthetic goals, anatomy, and aging in this region.

Main Methods:

  • Literature review and conceptual discussion.
  • Analysis of aesthetic principles.
  • Review of clinical and surgical anatomy.

Main Results:

  • The brow-eyelid continuum provides a framework for understanding upper facial aesthetics.
  • Integrated assessment of the brow and eyelids is essential.
  • Knowledge of anatomy and aging is critical for surgical planning.

Conclusions:

  • Surgical rejuvenation of the upper eyelids should consider the brow-eyelid continuum.
  • A holistic approach to the upper third of the face optimizes results.
  • Understanding the interconnectedness of facial structures is key to successful outcomes.