Why Are Eyelids Transparent?
Eyelids are movable tissue, which consists primarily of skin and muscle, that shields and protects the eyeball from mechanical injury. It helps to provide the moist chamber essential for the normal functioning of the conjunctiva and cornea. The conjunctiva is the mucous membrane that lines the eyelid. It also covers the visible portion of the eyeball except for the cornea.
Eyelids are therefore not transparent because if you have transparent eyelids, you will not be able to sleep. This is because the light will distract your sleep, and the pupil regulates the light that enters your eyes. If your eyelids are transparent, your vision could be blurred due to excess light entering the eyes. Therefore, we have opaque eyelids which will make you sleep comfortably and enjoy your dreams.
Component of Eyelids
Eyelids consist mainly of normal skin with small muscles under the skin that open and close them. If eyelids were transparent, you couldn’t sleep while seeing, or in fact, you could, but you’d wear out your eyes. So it would help if you stopped seeing for your eyes to rest and maintain themselves.
Transparent living tissue is complex because most living tissue is infused with capillaries that deliver blood to the cells, providing them with a constant oxygen supply. To be transparent, the tissue has to do without a blood supply. However, this means they get their oxygen directly from the air. Also, it means the tissue must be fragile so that oxygen can diffuse to all cells. That is how the corneal of your eyes work. The eyelids would not offer much protection if they were as thin and fragile as the cornea they are protecting.
To protect the eyelids, here are safety precautions to take into measures –
- Take care of your eye. Wear eye protection during any potentially dangerous activity. Ensure safety goggles are worn tight against the face; otherwise, a foreign body can fly up under the goggles and injure the eye.
- Take proper care of your contact lenses. Follow your doctor’s recommendations regarding wearing and cleaning them.
- See your doctor right away if you think you have an eye infection, if you injured your eye, or if you develop any pain or change in vision.