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.