This time we are looking on the crossword puzzle clue for: Pupil’s surrounder.
it’s A 18 letters crossword definition.
Next time when searching the web for a clue, try using the search term “Pupil’s surrounder crossword” or “Pupil’s surrounder crossword clue” when searching for help with your puzzles. Below you will find the possible answers for Pupil’s surrounder.
We hope you found what you needed!
If you are still unsure with some definitions, don’t hesitate to search them here with our crossword puzzle solver.
Random information on the term “IRIS”:
In humans and most mammals and birds, the iris (plural: irides or irises) is a thin, annular structure in the eye, responsible for controlling the diameter and size of the pupil, thus the amount of light reaching the retina. Eye color is defined by that of the iris. In optical terms, the pupil is the eye’s aperture, while the iris is the diaphragm.
The iris consists of two layers: the front pigmented fibrovascular layer known as a stroma and, beneath the stroma, pigmented epithelial cells.
The stroma is connected to a sphincter muscle (sphincter pupillae), which contracts the pupil in a circular motion, and a set of dilator muscles (dilator pupillae), which pull the iris radially to enlarge the pupil, pulling it in folds.
The circle circumference sphincter constricting muscle is the opposing muscle of the circle-radius dilator muscle. The iris inner smaller circle-circumference changes size when constricting or dilating. The iris outer larger circle-circumference does not change size. The constricting muscle is located on the iris inner smaller circle-circumference.