Define the following terms:

(a) Conjunctiva

(b) Lysozyme

(c) Adaptation

(d) Power of accommodation

(e) Ear ossicles

(a) Conjunctiva — A thin membrane covering the entire front part of the eye . It is continuous with the inner lining of the eyelids.

(b) Lysozyme — Lysozyme is an enzyme present in tear which has antiseptic property.

(c) Adaptation — Adaptation of the eye is the process by which the eyes adjust to changes in light levels, allowing us to see clearly in both bright and dim environments.

(d) Power of accommodation — Power of accommodation is the ability of the eye lens to focus near and far object clearly on the retina by adjusting the thickness of lens (and hence focal length).

(e) Ear ossicles — The three bones present in ear, i.e. malleus, incus and stapes; together are called ear ossicles.