What Is Night Blindness?


Night blindness might sound like an exaggerated condition I mean, it’s kinda hard for anyone to see in the dark But it’s real and it can be caused by any number of things That affect the complex mechanics of your vision The inside surface of your eye is the Retina And it’s mostly made up of two kinds of sensory cells, rods & cones Rods simple detect light allowing you to see in shades of grey While cones work together to provide color vision Night blindness, officially known as Nyctalopia, is any condition that interferes with the functioning of your rods which makes it difficult for your eyes to detect light In most cases with nyctalopia a person’s vision is pretty normal in bright or modern conditions, but in low light their vision is so weak that it approaches actual blindness. But night blindness isn’t considered a disorder on its own it’s a symptom of other conditions that either hinder light from reaching the rods or impair their function. For example cataracts cloudy areas that form in the lense of the eye can block or bend life providing the rods from detecting it properly And because rods are mostly found around the edge of the retina Anything that changes the shape of the eye or the direction of the light entering it, can affect the night vision. This includes some form of nearsightedness or the effects of some vision correcting surgery or medications or disorders that affect the pupil of the eye Also you rods only work because they contain a light-sensitive protein called rhodopsin and your body can’t make rhodopsin without vitamin A so nightblindness can also be caused by a vitamin A deficiency Many orange foods like carrots and cantaloupe and dark greens such as kale or spinach are very rich in vitamin A So treatment for nyctalopia can range from improving your nutrition to getting prescription eyeglasses to surgery so as you can see night blindness is for realzies Thanks for asking and thanks to specialitors subbable subscribers who keeps these answers coming If you have a quick question, let us know on Facebook, Twitter, Tumblr or in the comments below and don’t forget to go to youtube.com/scishow and subscribe!

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