Eyesight
How do good is your perception or in other words how is your eyesight? Eyes are the most attractive features on our face. People eat vitamin A tablets, walk bare footed on the green grass etc. to improve their vision. One should always learn to protect their eyes as they are one of the most sensitive parts of our body.
Ibn al-haytham who is called the father of optics was amongst the first people to study perception and also wrote a book on optics in the 1000s. Also, he was one of the first scientists to give the theory which said that vision occurs in the brain and not in our eyes. Later on Leonardo DaVinci recognized the special optical qualities of the eyes. He said that there is just one distinct and clear vision along the line of sight that is, the optical line which ends at fovea at one end of our eyes.
Scientifically, eyesight is the ability to deduce the visible lights reaching our eyes after striking some material which is then sent to our brain for planning the action to be taken. The final perception that is obtained is called the eyesight or the vision. The main process of seeing starts with the lens of the eye when it focuses on an image from the world around us which is further directed onto the light sensitive membrane placed at the back of our eyes called as the retina. The retina is usually considered as the isolated part of the brain which serves as a transducer for the purpose of conversion of the light patterns into a neuron signal. The lens of our eyes focuses the entering light onto the photoreceptive cells on the retinal screen which thus detects the value of the photons of the light and then responds by producing a neural signal in the form of an impulse. These impulses are then analyzed by the concerned parts of our brain and then a message about the object is sent in the form of an impulse to the retina. This is how we are able to see an object and then recognize it.
Different parts of our eyes require different minerals and vitamins for a good functioning. For instance, the lens, retina, macula etc. require various minerals, vitamins, antioxidants for their functioning. Vitamins C and E helps in providing a healthy and long term vision to our eyes. Pantothenic acid a sub part of the vitamin B also helps in improving the clarity in our vision. Thus, in other words, a good healthy diet comprising of green leafy vegetables and fruits helps in persisting a good clear vision.
This entry was posted on Monday, September 1st, 2008 at 12:51 pm and is filed under Perception. You can follow any responses to this entry through the RSS 2.0 feed. You can leave a response, or trackback from your own site.