You might be able to see the veins in your eyes, especially when you blink. This is a normal phenomenon called the Purkinje Tree and is caused by the way light illuminates the blood vessels in your retina. The retina is the inner surface of the back of your eye, and it contains blood vessels like most living tissues. When light hits these vessels, they cast shadows that can be seen as a network of branching lines.
The Purkinje Tree is more noticeable in certain conditions, such as:
- Bright light: When bright light shines into your eyes, it can illuminate the blood vessels in your retina, making them more visible.
- Eye exams: During eye exams, your doctor might shine a bright light into your eyes, which can also reveal the Purkinje Tree.
- Closing and opening your eyes: The brief period of darkness when you close your eyes, followed by the sudden burst of light when you open them, can make the Purkinje Tree more noticeable.
While seeing veins in your eyes when you blink is generally harmless, it's essential to consult an eye doctor if you experience any of the following:
- Sudden onset of blurry vision
- Pain in your eyes
- Flashes of light
- Seeing floaters or spots
These symptoms could indicate a more serious condition that requires medical attention.
