Sight is one of the most important senses in humans and other animals. It allows us to see the world around us and to make sense of what we are seeing. Without sight, we would be unable to navigate our environment or interact with other people.
The eye is the organ of sight. It is a complex structure that includes the cornea, iris, pupil, lens, retina, optic nerve, and other parts. Light enters the eye through the cornea and passes through the pupil and lens. The image is focused on the retina, which converts it into electrical impulses that are sent to the brain through the optic nerve. The brain then interprets these impulses as images.
There are many different types of vision problems that can affect a person’s ability to see clearly. These include refractive errors (such as nearsightedness and farsightedness), cataracts, glaucoma, macular degeneration, and diabetic retinopathy. Some vision problems can be corrected with glasses or contact lenses, while others require surgery or other medical treatment.