Essay --

Colour vision refers to the ability of an organism to distinguish between stimuli establish on the kinklengths of light they emit, reflect or transmit. We live in a world filled with work which we use as an advantage on a day-to-day basis to signify danger, make things stand kayoed and to help us categorise the world around us. However, 1 in 12 males and 1 in 200 females ( close to 4.5% of the population) suffer from some manikin of colourize vision deficiency or cunningness (Colour Blind Awargonness, 2014). It is then of interest to investigate what is different about the visual system in this minority and why the occurs. This essay will investigate this by considering what colours actually are in terms of wavelengths of light, investigating the differences of what we perceive to be a coloured world based on the different visual systems of non-human animals. Finally it will look at what makes the system of colour finesse military man different, questioning whether we seat really consider them colour blind at all. The basis of our vision is a direct cause of photons (light) entranceway our eyes from the environment around us. We examine these photons in one of twain ways either the intensity of the light (number of photons) or by examining the wave energy. This wave energy is what enables colour vision, and refers to our eyes ability to detect brush aside changes across the electromagnetic system of light. As a whole this consists of a variety of parts cosmic rays, gamma rays, x-rays, ultra-violet light, visible/white light, infrared, microwaves and radio waves. Our human eyes are only sensitive to the visible white-light which ranges from approximately 400 to 700 nanometres (nm) across the electromagnetic system. Newton is heavily credited towa... ...t differences in colour therefore relies on the sensitivity of different types of cone stall within our retina. This is what enables us to see the full spectrum of visible light from megrims into the deep reds. It is evident from studies with dogs, birds, snakes and other animals that having a different number of cones, or having these cones sensitive to different wavelengths causes a completely different perspective of our colour world. As a result Dichromatic or Monochromatic humans who are missing a certain type of cone(s), or fifty-fifty trichromatic humans with a cone sensitive to an anomalous wavelength can be labelled as colour blind. Whilst these colour blind individuals are usually still able to detect differences in colour across the visible spectrum of light they ultimately see the colour world in an abnormal way to an individual with a normal visual system.