Embryology of Eye : Mnemonic

Surface ectoderm derivatives

Mnemonic: LEVeL

  1. Lens
  2. Epithelium
    • All ocular adnexa including mebomian gland and glands of Zeis and Moll
    • Skin
    • Cornea
    • Conjunctiva
  3. Vitreous (portion)
  4. Lacrimal glands and drainage system

Neuro-ectoderm (Optic vesicle and cup) derivatives

Mnemonic: MORE

  1. Muscles of pupil (constrictor and dilator pupillae)
  2. Optic nerve
  3. Retinal pigment epithelium
  4. Epithelium of iris and ciliary body

Mesoderm derivatives

Mnemonic: MESO

  1. Muscles (Extraocular)
  2. Endothelium of eye and orbital blood vessels
  3. Sclera (temporal portion)
  4. Others (Vitreous)

All other structures are derived from Neural crest cells.


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