6/11/2023 0 Comments Eye structure downloadThis arrangement helps us to see well in different environments of light levels, making sure that the correct amount of light reaches the retina which is present at the back of the eye. If a person is present in a particularly bright environment, then the pupil contracts to allow only little light to enter, while if in a darker environment, it gets expanded to let more light enter. Pupil: it is the part of the eye which we see through, and it keeps on changing size based on light levels. It opens and closes both voluntarily and involuntarily, and allows blinking to help keep the eye hydrated and well-lubricated. External Parts of Human EyeĮyelid: the eyelids cover the eye in order to protect it from dust, grit, and perspiration that can further cause damage. The entire machinery works in quite a complex manner. Optical components help in the formation of an image that further gets perceived and interpreted by the brain through the connecting neurons. Humans possess binocular vision, which means that both the eyes are able to create a single combined image. The human eye can be broken down into parts that are visible externally while looking in the mirror, and parts that aren’t visible since they are situated inside the eye, or further towards the back. Although we value our vision the most above all our senses (accounting for about 80% of all impressions), a lot of people surprisingly know very little about how our eyes work. Composed of many intricate parts working together, that results in something that everyone depends on heavily every single day i.e.
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