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Explore anatomy. Understand the eye.

Whole eye → structures → tissue layers → function

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From understanding anatomy to clinical practice

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What this covers, and its sources

Corneal layers; retinal layers with the two blood supplies; the anterior chamber angle and the gonioscopy landmark order; the lids and lacrimal system; the six extraocular muscles, their actions and the diagnostic positions of gaze; the cranial nerves of the eye through the cavernous sinus and superior orbital fissure; the light reflex and the three-neuron sympathetic chain. Mechanism cards: aqueous dynamics with Goldmann's equation, the tear film, phototransduction and the retinoid cycle, accommodation, the light reflex and anisocoria, yoke muscles and Hering's law, corneal healing and sensation.

Switch between detailed 3D models, the Human Atlas eye and orbit specimen, and approved synthetic teaching illustrations. Assessment uses separate unlabelled schematics. Each representation carries its own sources and limitations; these are educational views, not measurements or patient images. The human anatomy collection adds 2,234 BodyParts3D meshes across 15 systems, with search, isolation and separation. BodyParts3D geometry is attributed under CC BY 4.0; adapted Human Atlas application code retains its MIT licence. This adult male reference does not cover every anatomical variation.

This is a study surface, not a clinical tool: the records and modules it links to own every threshold, dose and decision rule, and it asserts nothing about a patient.

References & bibliography

Sources for the whole eye, tissue layers, muscle actions, accommodation, aqueous flow, glaucoma mechanisms, brain and whole-body anatomy, and teaching illustrations. Structure-specific references remain beside each model. These sources support the teaching content; they do not validate generated images or certify the rendered geometry. Clinical review pending.

View OptoGuide’s shared bibliography (sign-in required)
  1. Human lens dimensions and ciliary ring changes measured by MRI (2018).
  2. NCBI Bookshelf: Neuroanatomy, Cranial Nerve 2 (Optic)
  3. Kolb H. Gross Anatomy of the Eye. Webvision.
  4. Helga Kolb, Webvision: Simple Anatomy of the Retina
  5. Rehman I, et al. Anatomy, Head and Neck, Eye. StatPearls.
  6. Ludwig et al. Corneal anatomy
  7. National Eye Institute. How the Eyes Work.
  8. Ultrahigh-resolution OCT imaging of the human cornea
  9. Boote et al. Scleral structure and biomechanics
  10. Nickla & Wallman. The multifunctional choroid
  11. Iris sphincter and dilator anatomy
  12. Ciliary body and ciliary process anatomy
  13. Aliancy & Mamalis. Crystalline lens
  14. Danysh & Duncan. The lens capsule
  15. Human vitreous architecture in vivo
  16. Human vitreous base anatomy and variation
  17. Kolb et al. Architecture of the human fovea
  18. Campbell et al. Human retinal vascular plexuses
  19. Salazar et al. Human optic nerve anatomy
  20. Webvision. Photoreceptors
  21. Kolb. Retinal glia
  22. Human RPE organelle ultrastructure (volume electron microscopy)
  23. Lindell et al. Human RPE membranes and organelle polarity
  24. Tamm. Trabecular outflow anatomy
  25. Anterior chamber angle anatomy
  26. Zanganeh & Legault. Extraocular muscle actions and innervation.
  27. Abdelhady et al. Superior oblique anatomy.
  28. StatPearls. Inferior oblique anatomy.
  29. Khadia et al. Eyeball simulator for extraocular muscles. IJO, 2023.
  30. Clinical Methods. Diplopia: eye movements and examination.
  31. Dubbelman et al. In-vivo lens shape changes with accommodation (2005).
  32. Croft et al. Lenticular and extralenticular accommodation in humans and monkeys (2013).
  33. Purves et al. Formation of images on the retina. Neuroscience.
  34. Goldberg. Computer-animated model of accommodation (2011): proposed reciprocal zonular action.
  35. University of Queensland. Theory of vergences.
  36. National Eye Institute. Glaucoma and eye pressure.
  37. National Eye Institute. Types of glaucoma.
  38. AAO EyeWiki. Primary versus secondary angle closure.
  39. Goel et al. Aqueous humor dynamics: a review.
  40. OpenStax. Anatomy and Physiology 2e: Central nervous system.
  41. Purves et al. Neuroscience, 2nd ed. Internal Anatomy of the Cerebral Hemispheres and Diencephalon (2001).
  42. Purves et al. Neuroscience, 2nd ed. The Ventricular System (2001).
  43. Schmolesky. Webvision: The Primary Visual Cortex (updated 2007).
  44. Purves et al. Neuroscience, 2nd ed. Neural Control of Saccadic Eye Movements (2001).
  45. McGovern Medical School. Neuroanatomy Online: The Brain Stem — Overview.
  46. Lieber S, Fernandez-Miranda JC. Anatomy of the Orbit. J Neurol Surg B Skull Base. 2020;81:319–332.
  47. Elsevier. Complete Anatomy: Iliotibial tract.
  48. OpenStax. Anatomy and Physiology 2e: Mouth, pharynx and oesophagus.
  49. OpenStax. Anatomy and Physiology 2e: Fibrous joints.
  50. OpenStax. Anatomy and Physiology 2e: Digestive organisation and peritoneum.
  51. University of Michigan. BlueLink: Neck learning objectives (2025), laryngeal skeleton and vocal ligaments.
  52. FIPAT / IFAA. Terminologia Anatomica Humana: hepatovenous segment taxonomy (FMA mappings).
  53. OpenStax. Anatomy and Physiology 2e: Heart anatomy.
  54. OpenStax. Anatomy and Physiology 2e: Blood vessels.
  55. OpenStax. Anatomy and Physiology 2e: The lungs.
  56. OpenStax. Anatomy and Physiology 2e: Respiratory structures.
  57. OpenStax. Anatomy and Physiology 2e: Liver, pancreas and gallbladder.
  58. OpenStax. Anatomy and Physiology 2e: The stomach.
  59. OpenStax. Anatomy and Physiology 2e: Small and large intestines.
  60. OpenStax. Anatomy and Physiology 2e: Kidney anatomy.
  61. OpenStax. Anatomy and Physiology 2e: Urine transport.
  62. OpenStax. Anatomy and Physiology 2e: Testicular reproductive system.
  63. OpenStax. Anatomy and Physiology 2e: Lymphatic and immune anatomy.
  64. OpenStax. Anatomy and Physiology 2e: Pituitary and hypothalamus.
  65. OpenStax. Anatomy and Physiology 2e: Adrenal glands.
  66. OpenStax. Anatomy and Physiology 2e: Bone structure.
  67. OpenStax. Anatomy and Physiology 2e: The skull.
  68. OpenStax. Anatomy and Physiology 2e: Vertebral column.
  69. OpenStax. Anatomy and Physiology 2e: Skeletal muscle interactions.
  70. OpenStax. Anatomy and Physiology 2e: Connective tissues.
  71. OpenStax. Anatomy and Physiology 2e: Skin layers.
  72. OpenStax. Anatomy and Physiology 2e: Sensory perception.
  73. OpenStax. Anatomy and Physiology 2e: Upper-limb bones.
  74. OpenStax. Anatomy and Physiology 2e: Lower-limb bones.
  75. OpenStax. Anatomy and Physiology 2e: Abdominal and thoracic muscles.
  76. OpenStax. Anatomy and Physiology 2e: Upper-limb muscles.
  77. OpenStax. Anatomy and Physiology 2e: Lower-limb muscles.
  78. OpenStax. Anatomy and Physiology 2e: Circulatory pathways.
  79. Anatomy of cornea and ocular surface
  80. Morphological evaluation of normal human corneal epithelium
  81. Composition, Structure and Function of the Corneal Stroma
  82. Descemet's membrane development, structure, function and regeneration
  83. Dynamic Regulation of Barrier Integrity of the Corneal Endothelium
  84. The pre-Descemet's layer: discovery, characterisation, clinical and surgical applications, and the controversy
  85. Re: Human corneal anatomy redefined: a novel pre-Descemet layer
  86. New Gonioscopy Technique for Finding Schwalbe's Line: The Ortiz Maneuver
  87. European Glaucoma Society Terminology and Guidelines for Glaucoma, 4th Edition — Part 1
  88. Anterior Chamber Angle Assessment Techniques: A Review
  89. Contemporary Approach to Narrow Angles
  90. NCBI Bookshelf: Upper Eyelid Blepharoplasty, anatomy
  91. Diagnostic imaging of the nasolacrimal drainage system, Part I
  92. AAO EyeWiki: Extraocular Muscles
  93. NCBI Bookshelf: Pupillary Light Reflex
  94. NCBI Bookshelf: Anatomy, Head and Neck: Eye Iris Sphincter Muscle
  95. NCBI Bookshelf: Horner Syndrome
Schematic bibliography · textbooks and chapters
  • Snell RS, Lemp MA. Clinical Anatomy of the Eye, 2nd ed. Blackwell, 1998, ch. 6.
  • Remington LA. Clinical Anatomy and Physiology of the Visual System, 3rd ed. Elsevier, 2012, ch. 2.
  • Wilson et al. The Corneal Basement Membranes and Stromal Fibrosis (2018), PMID 30098200.
  • Remington LA. Clinical Anatomy and Physiology of the Visual System, 3rd ed. Elsevier, 2012, ch. 4.
  • Kolb H. Simple anatomy of the retina. In: Webvision: The Organization of the Retina and Visual System. University of Utah, 2012 (webvision.med.utah.edu).
  • Snell RS, Lemp MA. Clinical Anatomy of the Eye, 2nd ed. Blackwell, 1998, ch. 6 and 7.
  • Alward WLM. Color Atlas of Gonioscopy, 2nd ed. American Academy of Ophthalmology, 2008 (landmark order).
  • Snell RS, Lemp MA. Clinical Anatomy of the Eye, 2nd ed. Blackwell, 1998, ch. 3 and 4.
  • Remington LA. Clinical Anatomy and Physiology of the Visual System, 3rd ed. Elsevier, 2012, ch. 9.
  • von Noorden GK, Campos EC. Binocular Vision and Ocular Motility, 6th ed. Mosby, 2002, ch. 3.
  • Snell RS, Lemp MA. Clinical Anatomy of the Eye, 2nd ed. Blackwell, 1998, ch. 5.
  • Snell RS, Lemp MA. Clinical Anatomy of the Eye, 2nd ed. Blackwell, 1998, ch. 10.
  • Miller NR, Newman NJ (eds). Walsh and Hoyt’s Clinical Neuro-Ophthalmology, 6th ed. Lippincott Williams & Wilkins, 2005.
  • Kardon RH. Anatomy and physiology of the autonomic nervous system. In: Miller NR, Newman NJ (eds). Walsh and Hoyt’s Clinical Neuro-Ophthalmology, 6th ed. 2005.

Model and software credits

Human Atlas application code is MIT licensed. BodyParts3D geometry is © The Database Center for Life Science, licensed under CC BY 4.0. These credits describe asset provenance and reuse permissions, separately from the clinical references above.

Human atlas attributionEye and orbit attributionMIT licenceCC BY 4.0 licence