Black eyes are caused by bleeding underneath the skin due to blunt impact. The skin underneath the eyes is thinner, so blood pooling in the area is more obvious than in other areas, giving the distinctive shine to a black eye.Continue Reading
Black eyes are caused by strikes to the eye, forehead or nose areas. A blow to the nose in particular may cause both eyes to swell, while a strike to one eye only affects that side. Some surgical procedures can also cause black eyes, such as facelifts or nose or jaw surgery. The area underneath the eyes is loose and full of fat, so fluid can easily accumulate in the area due to the affects of gravity.
Black eyes are best treated with cold packs placed around the affected area, taking care to avoid the eye. The cold reduces swelling and should be applied over 24 to 48 hours. The Mayo Clinic suggests that while black eyes may not be serious, the impact that leads to a black eye warrants a medical examination. They can cause high pressure or bleeding inside the eye, potentially leading to sight loss. Any strikes that cause vision issues or pain also require immediate medical attention.Learn more about Organs
The part of the eye that contains the sensory receptors for sight is the retina. The sensory receptors are located in the outermost layer of the retina, which means that light must travel through several layers before reaching the receptors.Full Answer >
The function of the iris is to control light levels in the eye. The round, black dot in the center of the iris is called the pupil.Full Answer >
According to the American Optometric Association, the eye works by light entering the eye and traveling through the different parts of the eye. Each part plays a vital role in creating a visual image.Full Answer >
The eye belongs to the nervous system, which is responsible for sending, receiving and processing information sent through nerve impulses. The optic nerve is part of the eye and part of the central nervous system.Full Answer >