To better understand vitreoretinal/retinal abnormalities, we must first examine the function of vision.
To be able to see, a light source is required. Without light everything is black. Light produces particles, called photons, which reflect off solid objects in all directions before finally reaching the eye.
In order to see well, the tissue must be clear for photons to pass through easily.
Initially, on their passage to the eye, they penetrate the cornea, which is located at the front of the eye. Then, the crystalline lens behind the pupil. Then the vitreous body in the centre of the eye. Finally, they reach the retina of the eye, which is like the camera film. They stop at the retinal epithelium where the nerve impulses begin.
These impulses are directed directly to the optic nerve and then to the optic nerve pathways before reaching the occipital lobe of the brain where the image is formed. This is the process by which we perceive the world around us.
