Embryology Flashcards
Where does most of the eye come from?
Ectoderm
What does the mesoderm produce in the eye?
EOMs (striated myocytes)
Vascular endothelium
Where does most the mesenchymal tissue come from?
Neural crest cells
What are these?
If the optic fissure fails to close what does this cause in the iris/ optic nerve/ choroid?
Where does this usually happen?
Colobomas
6 o’clock
What does the lens cortex develop from?
Anterior cuboidal epithelial cells
What day does the hyaloid vasculature reach maximal development, then start to atrophy?
What takes over giving nutrition to the lens?
Day 45
Aqueous humour
What is mittendorf’s dot?
What does it indicate?
Dot on posterior lens capsule
Incomplete regression of the hyaloid vessel
What is the epithelium formed from?
Surface ectoderm
What is the corneal endothelium and stroma from?
Mesenchymal neural crest cells
What is the ciliary muscle and most of the iridocorneal angle formed from
Mesenchymal neural crest cells
What nourishes the developing lens?
Tunica vasculotis lentis, from the hyaloid vessel
What is cloquet’s canal?
Remnant of the hyaloid vessels
What are eyelid muscles from?
Mesoderm
What are eyelid dermis and tarsus from?
Neural crest derived mesenchyme
