Sense organs are termed as specialized organs that assist to observe the world around us. The sense organs comprised of eyes, ears, nose, skin, and tongue. These sense organs possess receptors, which convey information through sensory neurons to the specific region within the nervous system. There are two types of receptors, namely general receptors and special receptors. General receptors are usually found in the skin, muscles, joints, and visceral organs. Special receptors such as chemoreceptors or chemical receptors usually present in the nose and mouth, photoreceptors or light receptors present in the eyes, and mechanoreceptors present in the ears. In humans, eye diseases such as cataracts, glaucoma, and macular degeneration can cause impairments of the vision.
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