naczyniówk

Naczyniówka, also known as the choroid, is a vascular layer of the eye situated between the retina and the sclera. It is one of the three layers that make up the uvea, the other two being the iris and the ciliary body. The primary function of the naczyniówka is to provide nourishment to the outer layers of the retina, including the photoreceptor cells. Its rich blood supply is crucial for maintaining the health and optimal function of these light-sensitive cells.

The naczyniówka is composed of a dense network of blood vessels. In addition to its nutritive role, it also plays a part in thermoregulation of the eye, absorbing scattered light and preventing excessive reflection within the eyeball, which could degrade image quality. The pigmentation of the naczyniówka, primarily due to melanin, contributes to this light absorption.

Pathologies affecting the naczyniówka can have significant consequences for vision. Conditions such as inflammation (choroiditis), detachment, or degenerative changes can impair the blood supply to the retina, leading to vision loss. Diseases like age-related macular degeneration (AMD) and certain infections can directly impact the health of the naczyniówka. Its intricate vascular structure makes it susceptible to various systemic conditions that affect blood vessels.