Why People hold books at a distance when reading? The closest distance for distinct, clear vision is called the near point. The general accepted distance is 10 inches (25 cm), but it is less for very young children and people with myopia (farsighted). Discover for Yourself Find the closest point where your eyes can form a […]
Vision: Butterflies vs. People
People Can Only See Visible Light. Light is a form of wave energy called electromagnetic radiation. Visible light is the only kind of light that people can see. Visible light comes in different colors. Each visible light color has a different amount of energy. Each visible light color has a different wavelength (these are shown […]