13/05/2019 0 Comments
Colour and the Human Eyes
Imagine a world without colour. Thanks to tiny, specialized cells in your eyes, called cones, you don’t have to miss out on visual pleasure. These light receptors send messages to our brain, resulting in familiar colour sensations. Humans are not the only species on earth who are fortunate to see colours. Birds, fish, and a number of other mammals can also visualize the full colour spectrum.
Our modern understanding of how we see colour comes from a theory developed by Isaac Newton. After a series of experiments, Newton concluded that the colours you see are a reflection of wavelengths. Protect your eye health and continue to experience colour sensations with regular eye exams and protective eye wear from your Calgary Optometry Centre.
How Do You See Colour? Learn from Your Calgary Optometry Team
In order to understand how certain cells in your eye work to see colour, you must become familiar with all the components that make up your eyes. Read below to learn more about the different parts of your eyes and the important purpose they each serve:
● Retina – The retina is a light-sensitive lining of your eye.
● Lens – Located directly behind your pupil, the lens changes shape to allow the eye to focus light.
● Pupil – Pupils are the dark centre of your iris and are openings that allow light to enter the eye.
● Iris – The iris controls pupil dilation and the amount of light that enters your eye.
● Optic Nerve – Your optic nerve carries signals to your brain where the information is processed.
Now that you know more about the different eye components, you can continue to investigate how rods and cones ultimately help you see colour:
● Rods – Each of your eyes have over 120 million rods. They are mostly situated around the edge of the retina. Rods send black and white signals to your brain and are extremely sensitive to dim lighting. Rods are responsible for adjusting your eyes when you enter a dark room.
● Cones – Unlike rods, cones are mostly located in the middle of the retina. Each eye contains 6 million cones and interpret the colours that we see. They are also responsible for visual sharpness. Three different types of cones work together to translate long, medium, and short wavelengths of light. This information is then received by your brain and turns into the names you associate with different colours.
The ability to see and interpret colours is one of the most impressive functions of the human body. Do not take this gift for granted. Without the proper protection in place, you expose these delicate organs to harmful ultraviolet rays that may permanently damage your eyes. In order to protect your eyes and maintain healthy vision for the future, call your Calgary optometry experts at Crowfoot Vision Centre. We carry a wide selection of sunglasses that will suit any budget and help prevent long-term damage from the sun and other natural elements.
We are happy to provide optometry services to our customers in the Arbour Lake area. You can reach us at 403-241-3000 to schedule an eye exam. You can also drop by our location to see our vast collection of sunglasses.