Sight is one of the most important senses. Indeed, our ability to see is absolutely crucial in our world. In this section, I will tell you about a journey:
that of the light from the moment when it goes through the eye to the brain. This journey features a “radiation electromagnetic”, better known under the name of light. The light perceived by the eye corresponds to a range of wavelengths from 400 to 750 nanometers.
Light travels in waves. Sound intensity is calculated according to the amplitude of these waves and its frequency according to the number of times that a wave passes through a defined point in the course of a term. The wavelength is a important parameter, because it is the differences in wavelengths that allow us to apprehend the different colors.
1. The light enters the eye through the “cornea”.
2. The light passes through the “pupil”.
3. The “lens” directs light onto the “retina”.
4. The light energy is converted into neural energy.
(“light transduction”). To fully understand the transduction process luminous, let’s study the retina more closely. The retina, located on the posterior membrane of the eyeball, has specific cells, called “photoreceptors”, which are responsible for the transduction. These cells contain transmitters chemical “photopigments”, which are broken when they are the photons of light of the light wave enter in contact with them. This rupture causes a reaction that tells the cells to send a signal to the “optic nerve”. This signal goes to the “visual cortex”. of the brain, the area in charge of analyzing stimuli and visuals.