{"id":400,"date":"2018-08-19T02:29:42","date_gmt":"2018-08-19T02:29:42","guid":{"rendered":"https:\/\/www.palmettoeyeandlaser.com\/?p=400"},"modified":"2018-08-19T02:29:42","modified_gmt":"2018-08-19T02:29:42","slug":"understanding-eyes-work","status":"publish","type":"post","link":"https:\/\/www.palmettoeyeandlaser.com\/blog\/understanding-eyes-work\/","title":{"rendered":"Understanding How Your Eyes Work"},"content":{"rendered":"

\t\t\t\t\"\"Your eye works in a similar way as a camera. When you look at an object, light reflected from the object enters the eyes through the pupil and is focused through the optical components within the eye.<\/p>\n

The front of the eye is made of the cornea, iris, pupil and lens, and they focus the image onto the retina. The retina is the light sensitive membrane that covers the back of the eye. This membrane consists of millions of nerve cells which gather together behind the eye to form a large nerve called the optic nerve.<\/p>\n

When the light enters the eye, it is focused to a pinpoint on the macula, a small area in the center of the retina at the back of the eye. The macula is responsible for central detailed vision, allowing you to see fine detail and color, read and recognize faces.<\/p>\n

When light stimulates the nerve cells in the retina, messages are sent along the optic nerve to the brain. The optic nerves from the two eyes join inside the brain. The brain uses information from each optic nerve to combine the vision from the two eyes allowing you to see one image.<\/p>\n

To see clearly, the cornea and the lens must bend (refract) light rays so they focus on the retina. If the light rays don\u2019t properly focus on the retina, the image you see will be blurry. When this happens, it is called a refractive error.<\/p>\n

Refractive errors are caused by an imperfectly shaped eyeball, cornea or lens \u2014 or in the case of presbyopia, a lens that can’t change shape enough to focus on close objects \u2014 and are of these basic types:<\/p>\n