What does the transparent layer covering the exposed part of the eye called?

Conjunctiva:

1. The transparent layer covering the exposed part of the eye is commonly known as the conjunctiva.
2. It is highly vascularised.

The function of Conjunctiva:

1. The role of this is always to safeguard the cornea, which really is a sensitive area of the eye.
2. By releasing mucus as well as tears, the conjunctiva shields and lubricates the eye.
3. It safeguards the eye against microbial invasion and aids in immune monitoring.