What color are the pupils of a normal person?

May 16, 2023 Source: Cainiu Health

Dr. Cui Xin

Introduction

In normal individuals, the pupil is generally colorless. The pupil typically has no color because it is a circular opening at the center of the iris. Light passes through the pupil to reach the lens, and the outer wall of the eyeball is covered by a pigmented layer. This pigmented layer, known as the uvea, consists of the ciliary body, iris, and choroid, together forming a dark chamber.

Under normal circumstances, a person's pupil is generally colorless. Specifically: The pupil typically has no color because it is simply a circular opening in the center of the iris. Through the pupil, the lens can usually be seen, and the outer wall of the eyeball is covered by a pigmented membrane. This pigmented membrane consists of the ciliary body, iris, and choroid, together forming a dark chamber. Due to the structure of these components, the eye appears black when viewed from outside, although the pupil itself actually has no color. However, in certain diseases, the appearance of the pupil may change. For example, in patients with albinism, changes in the choroid during the course of the disease may cause the eyes to appear reddish. When tumors such as retinoblastoma are present, pathological changes in the retinal tissue may occur, causing the pupil to appear white when viewed externally. It is recommended that individuals avoid wearing cosmetic contact lenses frequently, as prolonged use may lead to eye discomfort or even cause eye disorders.

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