The Whiteness of the Sclera: WHAT does it depend on?
NordenBladet – The sclera, also known as the white of the eye, is a vital part of the eye anatomy. It protects the inner structures of the eye, such as the cornea, iris, and lens, and provides support for the eye muscles. A healthy sclera should appear white and opaque, but the whiteness can sometimes change due to various factors.
The whiteness of the sclera (the white part of the eye) can depend on several factors, including:
1. Hydration levels
2. Blood flow and circulation
3. Health of the liver and kidneys
4. Certain medical conditions (e.g. jaundice, scleritis)
5. Medications or substances (e.g. alcohol, drugs)
6. Eye rubbing or pressure
7. Aging
Hydration Levels: Proper hydration is important for maintaining a healthy sclera. Dehydration can cause the sclera to appear yellowish or dry, making the eyes look tired or sunken. It is important to drink enough water to keep the body hydrated and maintain the whiteness of the sclera.
Blood Flow and Circulation: Good blood flow and circulation are necessary to keep the sclera white. Poor circulation can cause the sclera to appear yellow or red, which can be a sign of an underlying medical condition. In severe cases, poor circulation can cause the sclera to become thin and weak, increasing the risk of injury to the eye.
Health of the Liver and Kidneys: The liver and kidneys play important roles in removing waste and toxins from the body. If these organs are not functioning properly, waste and toxins can build up in the bloodstream, causing the sclera to appear yellow. This is known as jaundice and can be a sign of liver disease or a problem with the bile ducts.
Medical Conditions: There are several medical conditions that can cause the sclera to change color. For example, jaundice, scleritis, and uveitis are all conditions that can cause the sclera to appear yellow, red, or inflamed. In some cases, these conditions can also cause pain or vision problems.
Medications or Substances: Certain medications and substances can cause the sclera to change color. For example, alcohol and drugs can cause the sclera to appear yellow or red. Some medications, such as antimalarial drugs, can also cause the sclera to appear yellow.
Eye Rubbing or Pressure: Rubbing or pressing on the eyes can cause the sclera to appear yellow or red. This is because the pressure can damage the blood vessels in the eye, causing them to leak blood and cause discoloration.
Aging: As people age, the sclera can become thin and transparent, making it more visible. This can cause the sclera to appear yellow or red, especially if there is underlying medical condition or injury.
In conclusion, the whiteness of the sclera can depend on a variety of factors, including hydration levels, blood flow and circulation, health of the liver and kidneys, medical conditions, medications or substances, eye rubbing or pressure, and aging. If you notice any changes in the whiteness of your sclera, it is important to see a doctor to determine the cause and get appropriate treatment.
Featured image: A change in the whiteness of the sclera can be a sign of an underlying health issue and should be evaluated by a doctor. A healthy sclera should appear white and opaque. (Pexels)
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