Why is the black part of the eye turning yellow?

Apr 14, 2022 Source: Cainiu Health
Dr. Chen You
Introduction
If the sclera (the white part of the eye) appears yellow, using lubricating eye drops may help alleviate eye fatigue, with generally favorable results. Clinically, sodium hyaluronate eye drops and ginkgo-digitalis eye drops are commonly used. Additionally, consuming more goji berries is beneficial, as they support liver health and improve vision. However, if yellowing persists or worsens, prompt ophthalmologic evaluation is essential, and patients should actively cooperate with their physicians for appropriate diagnosis and treatment. Patients must take this symptom seriously.

The iris—the pigmented part of the eye commonly referred to as the “black part” of the eye—is critically important to human health. Abnormal discoloration of the iris can cause harm to the body and may even affect overall facial appearance. So, what causes yellowing of the iris?

What Causes Yellowing of the Iris?

Yellowing of the eye can stem from numerous causes, most commonly related to internal medical conditions—such as impaired liver or gallbladder function, jaundice, or scleral yellowing. Additionally, external factors—including excessive eye strain, chronic sleep deprivation, and malnutrition—may also contribute to this phenomenon.

If the iris appears yellow, over-the-counter lubricating eye drops may help alleviate eye fatigue, with generally favorable results. Clinically, sodium hyaluronate eye drops or bilberry-leaf digitalis eye drops are commonly used. Additionally, consuming more goji berries is beneficial, as they support liver health and improve visual acuity. However, if symptoms persist, prompt consultation with an ophthalmologist is essential. Patients should actively cooperate with their physicians for appropriate diagnosis and treatment. It is crucial to take this symptom seriously—but avoid self-medicating without professional guidance. Identifying and addressing the underlying cause is key to effective management.

In daily life, individuals should prioritize ocular health: avoid prolonged熬夜 (sleep deprivation), minimize excessive eye use, maintain regular and restorative sleep patterns, and adopt a balanced diet. Dietary choices should emphasize light, easily digestible foods while avoiding spicy, stimulating, greasy, or raw/cold foods. Limit extended screen time—whether on smartphones or computers—as it can adversely affect eye health. We hope this information proves helpful!