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| EYE | |
|---|---|
| Name | Eye |
| Caption | Human eye (diagram) |
| System | Visual system |
| Latin | Oculus |
| Nerve | Optic nerve |
| Artery | Ophthalmic artery |
EYE
The eye is a complex sensory organ responsible for detecting light and enabling vision in humans and other animals. It interfaces with structures such as the Optic nerve, Visual cortex, Retina, Lens, and Cornea to form images and support perception related to figures like Leonardo da Vinci, Isaac Newton, Santiago Ramón y Cajal, and institutions including Moorfields Eye Hospital and the National Eye Institute. Research on the eye involves collaborations among entities such as Massachusetts Institute of Technology, Harvard University, Johns Hopkins University, University of Oxford, and companies like Allergan and Novartis.
The anatomical organization of the eye includes external and internal components studied by anatomists from Andreas Vesalius to contemporary teams at Mayo Clinic, Cleveland Clinic, and Johns Hopkins Hospital. External parts include the Eyelid (associated with Blepharitis literature at American Academy of Ophthalmology), Conjunctiva, Sclera, and Cornea, while internal chambers contain the Aqueous humor, Vitreous body, Iris, and Ciliary body. The posterior segment comprises the Retina, with layers characterized by histologists influenced by Santiago Ramón y Cajal and investigators at the National Institutes of Health. Vascular supply arises from the Ophthalmic artery and branches like the Central retinal artery; innervation involves cranial nerves such as Oculomotor nerve, Trochlear nerve, Abducens nerve, and sensory input from the Trigeminal nerve. Surgical approaches are practiced at centers including Bascom Palmer Eye Institute and Wills Eye Hospital.
Physiological mechanisms of vision were modeled by scientists including Isaac Newton, Hermann von Helmholtz, and researchers at University College London and Max Planck Society. Light transmission through the Cornea and refraction by the Lens focus images on the Retina, where photoreceptor cells—rods and cones—transduce photons using pigments such as rhodopsin studied by teams at University of Cambridge and Stanford University. Neural pathways convey signals via the Optic tract to subcortical centers like the Lateral geniculate nucleus and cortical regions including the Primary visual cortex and extrastriate areas mapped by laboratories at University of California, Berkeley and Massachusetts General Hospital. Processes such as accommodation, pupillary reflexes, stereopsis, and color vision have been examined in experiments by researchers at University of Chicago, Princeton University, and Columbia University. Clinical functional testing is implemented in settings like Wilmer Eye Institute.
Embryologic formation of the eye involves interactions among the Surface ectoderm, Neural crest, and Forebrain neuroectoderm, topics pursued by developmental biologists at Harvard Medical School and Karolinska Institute. Key genetic regulators include PAX6, RAX, OTX2, SOX2, and genes characterized by consortia such as the Human Genome Project and studies at Broad Institute. Congenital anomalies—anophthalmia, microphthalmia, coloboma—are linked to mutations investigated by groups at Great Ormond Street Hospital and Children's Hospital of Philadelphia. Genetic screening, prenatal diagnostics, and gene therapy trials have been advanced at University of Oxford, Imperial College London, and biotech firms like Spark Therapeutics.
A wide spectrum of ocular diseases is recognized in clinical practice at organizations including the World Health Organization and the American Academy of Ophthalmology. Anterior segment conditions include keratoconus, infectious keratitis, and cataract; posterior segment diseases include age-related macular degeneration, diabetic retinopathy, retinal detachment, and glaucoma. Infectious agents studied at Centers for Disease Control and Prevention include herpes simplex, Chlamydia trachomatis (trachoma), and onchocerciasis, with elimination efforts led by World Health Organization and NGOs like The Carter Center. Autoimmune and inflammatory disorders such as uveitis, Vogt–Koyanagi–Harada disease, and scleritis are managed at tertiary centers like Massachusetts Eye and Ear.
Diagnostic modalities developed at institutions like Moorfields Eye Hospital and Wilmer Eye Institute include slit-lamp biomicroscopy, optical coherence tomography pioneered by researchers at Tomo Technologies and Duke University, fluorescein angiography, visual field testing (Humphrey), and electroretinography. Medical treatments encompass topical agents from pharmaceutical companies such as Pfizer and Roche, systemic immunosuppressants from centers like Mayo Clinic, and intravitreal injections including anti-VEGF therapies developed by Regeneron and Novartis. Surgical interventions include cataract extraction with intraocular lens implantation, laser trabeculoplasty, retinal detachment repair, corneal transplantation (penetrating and lamellar) performed at Bascom Palmer Eye Institute, and emerging approaches such as gene therapy trials at Oxford Biomedica and retinal prostheses engineered with collaborators like Second Sight Medical Products.
Comparative studies of ocular structures span taxa examined by naturalists from Charles Darwin to researchers at the Smithsonian Institution and Scripps Institution of Oceanography. Eyes range from simple photoreceptive patches in cnidarians to compound eyes in arthropods (studied by entomologists at Royal Entomological Society) and camera-type eyes in cephalopods and vertebrates, with convergent evolution explored by evolutionary biologists at University of California, San Diego and University of Michigan. Fossil evidence from paleontologists at Natural History Museum, London informs the timeline of ocular complexity, while molecular phylogenetics by teams at European Molecular Biology Laboratory traces opsin gene diversification across lineages.
The eye figures prominently in art, religion, and literature, appearing in works by Michelangelo, Rembrandt, Salvador Dalí, and described in texts such as the Bible and the Quran. Symbolism of the eye—seen in the Eye of Horus, the All-Seeing Eye on iconography related to United States symbolism, and motifs used by movements like Surrealism—has been analyzed by scholars at The British Museum and The Metropolitan Museum of Art. Public health campaigns by World Health Organization and philanthropic efforts by Lions Clubs International address blindness prevention, while policy initiatives related to disability rights engage bodies such as the United Nations and World Health Assembly.
Category:Sense organs