What is Fovela?
The concave rear wall of the interior of the eyeball is called retina. There is a certain area of retina called foveola, which is significantly responsible for visual acuity, the ability to sharply distinguish color and details. In human eyes, it is densely charged with four very specialized cells, the smallest separate units of life. Each releases an electrical signal when it is exposed to a certain color of light. The reason why the human eye must move and read is this text so that every subsequent letter sharply focuses on this small place.
The entire retina is covered with light -sensitive cells. Its outer edges are mainly cells called rods, which record only light versus dark and interpret movement. Progressive towards the center of the retina are cells of another type called cones that record color light. Offenter, all the nerves associated with millions of retina cells that are closer to create a "blind place". Almost exactly the centers are a small oval area of about 0.2 inches (5 mm) on average called macula.
Near the center of the macula is an offset called fovea, where concentic cells are concentrated. Finally, Foveola is in the middle. For an average man, the diameter has only about 0.008 to 0.014 inches (0.2 - 0.35 mm). Measured horizontally across the entire field of vision, captures the arch only 1.2 degrees.
Foveola contains exclusively conical cells. People have three types of conical cells, but the eyes of some animals may have four to allow a different range of sight. Between these three types there are some overlap, but basically differ in its sensitivity to red, green or blue light. From the combination of whether these three colors are detected or not by their conical cells, the human visual system is able to interpret the entire color spectrum.
Struck cells in Foveole differ slightly from normal because they are so densely compacted. Their mainThe meaning for human vision is indicated by the fact that all the nerves of foveol are connected into one large nerve that embarks a more direct way to the brain, differently from the main optical nerve. In Foveole, one other type of cell called Müller cells is a special interest for medical scientists. They are gli cells - cells that provide structural support, protection and nutrients in social nerve cells such as bars and cones. Some preliminary research suggests that Müller's cells are able to turn into and thus regenerate other types of eye cells.