Among all the organs in the body, the eyes is the most complex, especially considering its incredible importance despite the size.
The eyes are particularly vulnerable to a number of agents especially light. In this article we are going to examine how the eye functions and how it's reacts to different levels of light, as well as the dangers of over exposure to lights and it's potential treatment.
HOW DOES THE EYES WORK
When you at an object, the cornea is the part of the eye that is called into action. The cornea is the transparent front part of the eye which provides a protective window between the rest of the eye and the outside world.
When light rays meet the cornea, it's refractive power manipulates and bends them in such a way that they pass through the pupil (the hole located in the center of the iris)
Allowing light enter the eyes, Iris is the circular structure in the eye surrounding the pupil and it's responsible for reducing and enlarging the size of the pupil. In doing so it helps adjust how much light reaches the retina at the back of the eyes.
When light rays pass through the pupil, they also pass through the eye lens, this is a transparent, flexible structure that helps to refract light.
The lens is able to change the focal distance of the eye, allowing it to focus on object at various distance, it does this by changing shape, shortening and lengthening it's width.
The ray passes through a clear dense like structure, known as the vitreous, it transmit light to the retina.
Once light pass through the vitreous, light rays arrive at the retina and the retina is a light sensitive layers of tissue responsible for converting light rays into image
HOW EYES REACT TO DIFFERENT LIGHT INTENSITIES
The iris is the main guard of the eyes from extreme light intensity, it's job is to adjust the size of the pupil. It requires a certain level of light intensity for the retina to process into image, it is fundamental for the iris to moderate the amount of light that enters the eyes, because an excessive amount would cause the retina to struggle to process image.