Eyes itself protect by following mechanism:
a. Eyelid movement
- Mediated by striated and smooth muscles of eye.
- Movements involved are: ocular opening, gentle opening/closing, blinking.
- Distribute and conduct the tear.
b. Tear production and crying:
- Tear covering surface of eye are secreted from lacrimal gland and conjunctiva in different liquid forms.
- Tear flow occur via evaporation and drainage through nasolacrimal ducts.
- Maintain moisture and keep clear to conjunctiva and cornea.