![]() ![]() As we get older, our lens deteriorates preventing us from seeing in as much detail, which is why we require reading glasses. Lens - located behind the pupil, the crystalline lens allows the eyes to focus on small details. Contact lenses are placed on the cornea for visual correction. There are no blood vessels in the cornea, making it highly sensitive to pain. Pumps on the inside of the cornea continuously pump fluid that seeps into the cornea back into the eye. The cornea maintains its clarity by being relatively dehydrated in consistency compared to other tissues in the wall of the eye (sclera / white of the eye). The outer layer acts as a shield to the deeper layers which serve the purpose of strengthening the eye. The opening and closing of the pupil is often compared to the aperture in a 35mm camera.Ĭornea - this is the clear part at the front of the eye which focuses light into the eye. Pupil - this is the round centre in the iris through which light passes through. The pupil also opens in dark conditions, to allow more light in. It controls the amount of light entering the eye so that the pupil closes in bright conditions, to let less light into the eye. Iris - this is the colored part of the eye which features the pupil in the middle. Innermost layer-this is where the retina is located.Įach part of the eye performs a different function enabling us to see.Middle layer-the choroid, ciliary body and iris are located here.Outermost layer-made up on the cornea and sclera.The human eye is a complex organ with parts that work together to help us see. The components of the human eye are split into different parts. The anatomy of the human eye provides us with light perception, depth perception and the ability to see colour. This includes the cornea, iris, pupil, lens, retina, macula, optic nerve, choroid and vitreous. It features several components which work in conjunction to give us sight. The eye is the organ which helps us to see. The optic nerve then transmits these signals to the visual cortex – the part of the brain that controls our sense of sight.Medically reviewed by Alastair Lockwood on 04 March 2021 The retina acts like an electronic image sensor of a digital camera, converting optical images into electrical signals. Light focused by the cornea and crystalline lens (and limited by the iris and pupil) then reaches the retina – the light-sensitive inner lining of the back of the eye. Process called accommodation, this lens automatically helps the eye focus on near and approaching objects, like an autofocus camera lens. The eye’s crystalline lens is located directly behind the pupil and further focuses light rays. ![]() The iris (colored part) of the eye functions like the diaphragm of a camera, controlling the amount of light reaching the retina by automatically adjusting the size of the pupil (aperture). ![]() Light is focused primarily by the cornea – the clear front surface of the eye, which acts like a camera lens. In a number of ways, the human eye works much like a digital camera: Read on for a basic description and explanation of the structure (anatomy) of your eyes and how they work (function) to help you see clearly and interact with your world. ![]() How vision works or the ins and outs of eye health. When surveyed about the five senses - sight, hearing, taste, smell and touch - people consistently report that their eyesight is the mode of perception they value (and fear losing) most.ĭespite this, many people don’t have a good understanding of the anatomy of the eye, ![]()
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