lacrimal apparatus and Conjunctiva introduction

What is Conjunctiva
Conjunctiva develops from the ectoderm lining the lids and covering the globe .
Conjunctival glands develop as growth of the basal cells of upper conjunctival fornix. Fewer glands
develop from the lower fornix.

The lacrimal apparatus
Lacrimal gland is formed from about 8 cuneiform epithelial buds which grow by the end of 2nd month
of fetal life from the superolateral side of the
conjunctival sac .
Lacrimal sac, nasolacrimal duct and canaliculi. These structures develop from the ectoderm of
nasolacrimal furrow. It extends from the medial angle of eye to the region of developing mouth. The
ectoderm gets buried to form a solid cord. The cord is later canalised. The upper part forms the lacrimal sac. The nasolacrimal duct is derived from the lower part
as it forms a secondary connection with the nasal cavity. Some ectodermal buds arise from the medial
margins of eyelids. These buds later canalise to form the canaliculi.

Extraocular muscles
All the extraocular muscles develop in a closely
associated manner by mesodermally derived
mesenchymal condensation. This probably
corresponds to preotic myotomes, hence the triple
nerve supply (III, IV and VI cranial nerves).