IRIS CELLS Meaning and
Definition
-
Iris cells refer to the specialized pigmented cells present in the iris, which is the colored part of the eye. These cells play a crucial role in determining the color of the eyes and regulating the amount of light that enters the eye through the pupil.
The iris is composed of two main types of cells, known as melanocytes and iridial melanocytes. These specialized cells contain pigment granules called melanin, which give the iris its characteristic color and help protect the eye from harmful ultraviolet radiation. The amount and distribution of melanin within the iris cells determine various eye colors, including brown, blue, green, and gray.
Beyond their role in eye color, iris cells also function in controlling the size of the pupil. The pupil is the central opening of the iris that allows light to enter the eye. By contracting or expanding, the iris cells adjust the size of the pupil to regulate the amount of light reaching the retina at the back of the eye. This process, known as pupillary reflex, helps to optimize visual acuity in different lighting conditions.
Additionally, iris cells work together with other structures in the eye, such as the ciliary muscles and lens, to fine-tune the focusing power of the eye. Through their intricate coordination, iris cells ensure that the visual system can adapt to varying environmental conditions, leading to clear and sharp vision.
Common Misspellings for IRIS CELLS
- Earis Cells
- Iriss Cells
- Irise Cells
- Irises Cells
- Irid Cells
- Iryis Cells
- Irice Cells
- Irys Cells
- Ires Cells
Etymology of IRIS CELLS
The word "iris" comes from the Latin word "iris", which is derived from the Greek word "iris" meaning "rainbow". In ancient Greek mythology, Iris was the name of the goddess of the rainbow, who served as a messenger between the gods and humans.
The word "iris" was later adopted in anatomy to describe various parts of the body that had a circular or ring-like shape, resembling the rainbow. This includes the iris of the eye, which is the colored part surrounding the pupil. In terms of "iris cells", it likely refers to the cells found in the iris of the eye.
