Yellow eyes may be caused by excessive eye use, improper diet, liver fire, liver and gallbladder diseases, or aging. Here are the specific reasons:

1. Excessive Eye Use

Prolonged eye use without rest, such as constantly facing computers and staying up late, can lead to inadequate rest for the eyes. This can result in eye fatigue, causing red blood vessels to appear, and fat deposits in the conjunctiva, giving the eyes a yellow appearance.

2. Improper Diet

Consuming foods rich in carotenoids or taking colored medications can also cause yellow eyes. Adjusting the diet can usually restore the eyes to their normal color.

3. Liver Fire or Liver and Gallbladder Diseases

From the perspective of traditional Chinese medicine, the whites of the eyes belong to the heart and lungs. If there is heat in the heart and lungs, the eyes may turn yellow and develop red blood vessels. Yellow eyes are generally attributed to damp-heat, similar to jaundice and spleen deficiency. Jaundice is related to liver problems, while spleen deficiency often stems from excessive worry and overthinking. Weakened spleen function and reduced metabolic capacity can lead to the eyes turning yellow.

4. Signs of Aging

Many people do not experience yellow eyes when they are young, but as they age, their eyes may gradually turn yellow. This is due to the thickening of the eyeball wall with age and the deposition of lipid substances on the wall. This is a normal sign of aging and usually does not require extensive treatment. However, in some cases, such as age-related loosening of the orbital septum, fat from the eye socket can migrate into the conjunctival sac, resulting in a bulging yellow mass on the white part of the eye or in front of the eye. This condition is known as orbital fat prolapse and may require surgical intervention if it affects vision or appearance.