The Eye

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  • List the layers of the cornea
    • Corneal epithelium
    • Bowman’s membrane (anterior basement membrane)
    • Corneal stroma
    • Descemet’s membrane (Posterior basement membrane)
    • Corneal epithelium
  • List the layers of the sclera
    • Episclera
    • Tenon’s space (episcleral space)
    • Tenon’s capsule (substantia proper/ sclera proper)
    • Lamina fusca (suprachoroid lamina)
  • Where is aqueous humor formed, how does it flow and where is it drained? State its function
    • Formation: Ciliary body
    • Flow: ciliary body → lens → posterior chamber → anterior chamber → iridocorneal angle
    • Drainage: Iridocorneal angle → limbus → trabecular meshwork → canal of schlemm
    • Functions
      • Maintains intraocular pressure
      • Nutrition
      • Remove metabolites from avascular tissues of the cornea and lens
Formation of aqueous humor
Formation of aqueous humor
  • What are the functions of the ciliary body/ epithelium
    • Secretes aqueous humor
    • It is a component of the blood-ocular barrier
    • It secretes and anchors the zonula fibers, which form the suspensory ligaments of the lens
    • It regulates lens thickness (ciliary muscles)
  • In sequence, name the ten layers of the retina
    1. Retinal pigment epithelium (RPE)
    2. Layer of rods and cones
    3. Outer Limiting membrane
    4. Outer nuclear layer
    5. Outer plexiform layer
    6. Inner nuclear layer
    7. Inner plexiform layer
    8. Ganglion cell layer
    9. Layer of optic nerve fibers
    10. Inner limiting membrane
  • What are the functions of the Retinal pigment epithelium
    • Absorbs light to prevent reflection and glare
    • It is a component of the blood-retina barrier
    • It restores photosensitivity to dissociated visual pigments
    • It is responsible for the phagocytosis and disposal of membranous discs from rods and cones of the photoreceptor cells
  • Name and classify the glands of the eyelids
    • Merocrine glands
      • Eccrine sweat glands
      • Accessory lacrimal glands (glands of Wolfring and Krause)
    • Holocrine glands
      • Tarsal glands (Meibomian glands)
      • Sebaceous glands of eyelashes (glands of Zeis)
    • Apocrine glands
      • Apocrine glands of the eyelashes (glands of Moll)
Jeffrey Kalei
Jeffrey Kalei
Articles: 335

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