Retina anatomy diagram8/9/2023 ![]() And when there is low light, the iris opens up the pupil to let in more light.įocuses light rays onto the retina. When there is bright light, the iris closes the pupil to let in less light. The colored part of the eye which helps regulate the amount of light entering the eye. The center of the macula which provides the sharp vision. Corrective laser surgery reshapes the cornea, changing the focus. The clear front window of the eye which transmits and focuses (i.e., sharpness or clarity) light into the eye. Structure containing muscle and is located behind the iris, which focuses the lens. Many that have studied the human eye have said it certainly is a marvel of a Supreme Designer.Layer containing blood vessels that lines the back of the eye and is located between the retina (the inner light-sensitive layer) and the sclera (the outer white eye wall). The complexity of our eyes goes much deeper than this explanation here, and its detail of how they work could take much time to study. It is composed of retinal ganglion cell axons and support cells. Your optic nere has three meningeal layers. It is the second of twelve paired cranial nerves and is considered as part of your central nervous system. Optic Nerve: This is also known as your cranial nerve 2 because it transmits visual information from your retina to your brain. ![]() The cornea causes involuntary reflexes to close your eye because of itr s unmyelinated nerve endings. ![]() ![]() Working with the lens to refract light, it contributes to the ability of the eye to focus. The Cornea: This is the transparent part of your eye that covers the iris, pupil and the anterior chamber. The yellow color comes from what are called lutein and zeaxanthin, which are yellow xanthophyll carotenoids, which come from our diet. It acts like a natural “sunblock” for this area of the retina. It is responsible for absorbing excess blue and ultraviolet light that comes into your eye. It is the oval-shaped and highly pigmented yellow spot near the center of the retina. The Macula: This is commonly known as the yellow “spot” on your eye. It acts as the protective layer of your eye. The Sclera: This is known as the white part of the eye. It consists of light sensitive cells that absorb light rays and change them into electrical signals that are passed to the brain and then interpreted as visual images. The Retina: This is the innermost layer of the wall of your eye. The lens makes the final focus adjustments of light rays that come into your eye so that they are sharply focused on the retina. It is transparent and flexible and its shape is controlled by muscle fibers. The Lens: This is directly behind your iris. In the center of your iris is the circular pupil. The color of the iris is different because of our genetic makeup. It controls the diameter and size of your pupil and the amount of light that reaches the retina. The Iris: This is the colored circle of tissue that is behind the cornea. To this date, no one has been able to come remotely close to copying it. The inner workings of your eyes are a superlative design involving many complex functions and connections that no man has been able to duplicate. The light focuses on your retina and the retina reacts like the film in a camera by sending a record of it by means of your optic nerve to your brain. The simplest explanation involves the detection of light and conversion into electrochemical impulses in neurons. They work like a camera or, rather the camera was made to work like them. ![]() The intricate way in which they work will be explained below. Your eyes are said to be one of the most complex organs in your body. ![]()
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