Parts of Conjunctiva
- The conjunctiva can be divided into three parts: palpebral, fornix, and bulbar.
- The palpebral conjunctiva is located on the inside of the upper and lower eyelids.
- The fornix conjunctiva lines the sac at the junction between the back of the eyelid and the front of the eye. This area has thicker and looser conjunctiva which allows for free movement of the eyeball. The conjunctival sac formed at the transition of palpebral and fornix conjunctiva can hold around 7 µl of tear fluids and has the capacity to hold 30 µl of fluid.
- The bulbar conjunctiva is the thinnest part of the conjunctiva and covers the cornea and the front part of the eye. It is transparent enough that the white sclera and blood vessels can be seen clearly with the naked eye.
Difference Between Sclera And Conjunctiva
The human eye is a crucial body part consisting of several structures, including the iris, pupil, cornea, sclera, and conjunctiva. The conjunctiva and sclera are two essential components of the eye’s defense system. The conjunctiva is a thin layer of tissue that lines the eye and eyelids and helps maintain a balanced tear film while also providing protection against foreign objects and infections. The sclera, on the other hand, is a sturdy connective tissue composed of collagen and elastin that surrounds and gives the eye its shape. The sclera connects to the cornea at the front of the eye and joins with choroidal tissue at the back of the eye via the optic nerve. Maintaining the integrity of both the conjunctiva and sclera are vital for the overall health of the eye, as abnormalities or inflammation can lead to significant disruptions in the ocular system.
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