Normal Grade of Eyes can be seen on the Snellen chart. This is a graph created by an eye doctor from the Netherlands named Herman Snellen. This graph was created in 1862. This is an important standard that has been created to measure vision. The doctor has an assistant and a hunter so the doctor has good vision. The doctor uses a lead type to print the letter E. If the assistant can see the letter at a distance of 20 feet, then this is normal. This graph is designed to the smallest detail anyone can see. This is the smallest object that can be seen by someone and is equal to 5 arches. This doctor creates an eye diagram with a letter equivalent to 1 arch. You can see percentage notation on some graphs. This graph has a test distance equation divided by the smallest line that a patient can see. Visual acuity is 6 meters by number 6. The second number is the distance for normal vision (read : Pupil Reaction To Light). The 20/40 distance indicates that the patient has normal eyes and can see at a distance of 40 feet. Metric notation shows 6/12 so that the patient can see this letter at a distance of 12 meters. This distance is the legal limit used for driving. People in nature have amazing visions.
Normal Grade of Eyes
This is because the person is used to seeing the object at a great distance. The person’s eyes are not exposed to radiation from the computer. The tribe is also not much to read books or mobile phones. The Masai who live in Kenya also has amazing visions. They used to look for wild cows. This is the development of perfect distance vision. There is research that shows that we have the same graph with the tribe but our eyesight fails because we believe we cannot see at one point. The old eye does not require glasses but this happens in normal vision. Bad lifestyle makes young eyes need thick glasses.
A hundred years will not make our eyes become damaged. We can still see the object well for many years. Our eyes can still function normally but the visual system used to view computers every day can damage our eyesight. This is an activity called accommodative stress. This is a simple perrla eye strain that cannot be used for a long time. It takes you several hours to relieve this stress. If you cannot release this stress, then you definitely need glasses. There is a belief that the eyes cannot be treated besides using eyepieces and eyeglasses. Eyeglasses are referred to as a solution to such eye disorders. You must do vision exercises to restore your eyesight. You should start coming to the gym or running every day to recover your eyes. You should eat healthy foods that can provide nutrition for the health of your eyes. Carrots contain the necessary vitamin A for your eyes. You can make carrot juice and drink the juice every day. You should not miss a day without consuming this juice. You may need a doctor to restore your eyes. You can do vision training to get Normal Grade of Eyes.