Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

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...
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...
Photoreceptors and Visual Pathways01:22

Photoreceptors and Visual Pathways

At the molecular level, visual signals trigger transformations in photopigment molecules, resulting in changes in the photoreceptor cell's membrane potential. The photon's energy level is denoted by its wavelength, with each specific wavelength of visible light associated with a distinct color. The spectral range of visible light, classified as electromagnetic radiation, spans from 380 to 720 nm. Electromagnetic radiation wavelengths exceeding 720 nm fall under the infrared category, whereas...
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...
Focusing of Light in the Eye01:16

Focusing of Light in the Eye

Light rays enter the eye through the cornea, a transparent dome-shaped tissue that is the eye's outermost layer. The cornea bends or refracts, light rays traveling to the pupil. The shape of the cornea determines how much of the light is bent and whether the image will be focused correctly on the retina at the back of the eye. Once the light has passed through both refraction layers, it converges into a single focal point onto a small area. This is where photoreceptors start transforming...
The Retinoblastoma Gene01:20

The Retinoblastoma Gene

Tumor suppressor genes are normal genes that can slow down cell division, repair DNA mistakes, or program the cells for apoptosis in case of irreparable damage. Hence, they play an essential role in preventing the proliferation of damaged cells.
The first-ever tumor suppressor gene called Rb was identified in retinoblastoma - a rare eye tumor in children. In inherited forms of the disease, a child inherits one defective copy of the Rb gene, which predisposes them to retinoblastoma. However,...

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Increased Risk of Venous Thromboembolism in Patients With Thyroid Eye Disease Compared to Graves' Disease Without Orbitopathy.

Endocrine practice : official journal of the American College of Endocrinology and the American Association of Clinical Endocrinologists·2026
Same author

Biopsy-Only Versus Debulking Surgical Approaches for Pediatric Orbital Rhabdomyosarcoma: Impact on Eye Preservation and Oncologic Outcomes.

American journal of ophthalmology·2026
Same author

Ocular Morbidity and Visual Outcomes in Rare Craniofacial Clefts: A Contemporary Cohort Study of 102 Cases.

Plastic and reconstructive surgery·2026
Same author

Eyelid ptosis and dermatochalasis in obese patients with obstructive sleep apnoea: A large-scale propensity score-matched analysis.

Eye (London, England)·2025
Same author

Thyroid Eye Disease Research From 2010 to 2024: An Analysis of Social Media Impact Versus Traditional Citation Metrics.

Ophthalmic plastic and reconstructive surgery·2025
Same author

Ptosis and Craniosynostosis: Revisiting Syndromic and Surgical Associations.

The Journal of craniofacial surgery·2025

Related Experiment Video

Updated: Jun 22, 2026

Surgical Correction for Pediatric Epiblepharon and Trichiasis
03:59

Surgical Correction for Pediatric Epiblepharon and Trichiasis

Published on: July 8, 2025

Congenital and developmental eyelid abnormalities.

William R Katowitz1, James A Katowitz

  • 1Philadelphia, Pa. From the Oculoplastic and Orbital Surgery Service, Edwin and Fannie Gray Hall Center for Human Appearance, University of Pennsylvania, and the Division of Pediatric Ophthalmology, The Children's Hospital of Philadelphia.

Plastic and Reconstructive Surgery
|July 2, 2009
PubMed
Summary

This study reviews congenital and developmental eyelid abnormalities in children, detailing various conditions and their management. It highlights challenges in surgical reconstruction and anesthetic considerations for pediatric patients.

More Related Videos

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

Related Experiment Videos

Last Updated: Jun 22, 2026

Surgical Correction for Pediatric Epiblepharon and Trichiasis
03:59

Surgical Correction for Pediatric Epiblepharon and Trichiasis

Published on: July 8, 2025

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

Area of Science:

  • Ophthalmology
  • Pediatric Surgery
  • Reconstructive Surgery

Background:

  • Congenital and developmental eyelid abnormalities present significant challenges for reconstructive surgeons.
  • These conditions can manifest at birth (congenital) or during childhood development (developmental).

Purpose of the Study:

  • To review current evaluation and management strategies for various pediatric eyelid abnormalities.
  • To address the complexities of surgical reconstruction and anesthetic concerns in this patient population.

Main Methods:

  • Review of existing literature on congenital and developmental eyelid abnormalities.
  • Analysis of diagnostic and therapeutic approaches for conditions like ptosis, colobomas, and others.

Main Results:

  • Eyelid abnormalities encompass a range of conditions including entropion, ectropion, ptosis, lid retraction, epicanthal folds, blepharophimosis, colobomas, cryptophthalmos, and canthal dystopias.
  • Management requires careful consideration of social factors and pediatric-specific anesthetic concerns.

Conclusions:

  • Effective management of pediatric eyelid abnormalities necessitates a comprehensive approach.
  • Current methods for evaluation and surgical intervention are reviewed for each specific entity.