Szemkérgi

Szemkérgi is a Hungarian term that translates to "retinal pigment epithelium" in English. This is a crucial layer of cells located between the retina and the choroid. The RPE plays a vital role in maintaining the health and function of the photoreceptor cells, which are responsible for vision.

One of the primary functions of the RPE is to absorb scattered light. This prevents light from reflecting back into the photoreceptors, which could degrade their function and lead to blurred vision. Additionally, the RPE is responsible for transporting nutrients and oxygen to the photoreceptors and removing waste products. This continuous supply and waste removal process is essential for the survival and proper functioning of these light-sensitive cells.

The RPE also plays a significant role in the visual cycle, a process by which the photoreceptor cells regenerate their light-sensitive pigments. After light exposure, the pigments need to be chemically reset to be ready for the next signal. The RPE facilitates this regeneration process.

Damage or dysfunction of the retinal pigment epithelium can lead to various vision-threatening conditions. Diseases such as age-related macular degeneration (AMD) and retinitis pigmentosa are often associated with RPE degeneration. Research into understanding and treating these conditions frequently focuses on the health and regeneration of the szemkérgi.