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Chakri@Psb
Sr. Optometrist
SPERM-to-OVUM
SPERM-to-OVUM
Fertilization to 3rd Week Gestation Period
3 Germ Layers
ECTODERM: (Gives rise to the)
*Central nervous system (the brain
and spinal cord)
*Peripheral nervous system
MESODERM:
Connective Tissue
Cartilage
Heart Walls, Blood And Lymph
Vessels Cells
Bone
ENDODERM:
*Epithelial lining of the GI and
*Respiratory
*Liver
*Thyroid
Formation of Both eyes Eyes
Contact Between Neural ectoderm & Surface Ectoderm
Invaginating of Lens PLACODE & OPTIC VESICLE
• Lens Placode forms the Lens Vesicle (that pinches off the
surface ectoderm)
• Optic Vesicle forms the Bi-layered Optic Cup that
remains connected to the FOREBRAIN via the Optic Stalk
Retina Formation
Chakri@Psb
Sr. Optometrist

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Embryology of eye