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Artwork showing the pupil of eye in varying light
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Artwork showing the pupil of eye in varying light
Pupil of eye. Artwork showing how the pupil of the eye reacts in three different light intensities. The pupil is the circular opening (black) in the centre of the iris (blue). The muscles of the iris widen or narrow the pupil to adjust the amount of light entering the eye. In dim light at top, the pupil has dilated (widened) to allow more light to reach the light-sensitive retina at the back of the eye (not seen). In brighter light (centre) the pupil is smaller. Very bright conditions cause the pupil to constrict (narrow) to minimize the amount of light hitting the retina
Science Photo Library features Science and Medical images including photos and illustrations
Media ID 6449291
© HANS-ULRICH OSTERWALDER/SCIENCE PHOTO LIBRARY
Iris Pupil Sight Vision Visual Sense
EDITORS COMMENTS
This artwork showcases the intricate beauty of the human eye's pupil, highlighting its remarkable ability to adapt to varying light intensities. The photograph captures three distinct stages of the pupil's reaction to different lighting conditions, offering a fascinating insight into our visual sense. At the top of the image, we witness dim light illuminating the scene as the pupil dilates or widens. This dilation allows an increased amount of light to penetrate through and reach the retina at the back of our eye, which is responsible for capturing images and transmitting them to our brain. Moving towards the center of this mesmerizing print, we encounter brighter lighting conditions that prompt a noticeable change in pupil size. Here, we observe how our iris muscles effortlessly narrow down the circular opening, resulting in a smaller pupil diameter. This adjustment serves as a protective mechanism against excessive amounts of light hitting our sensitive retina. Finally, at its bottommost section lies an illustration depicting very bright conditions where extreme brightness causes rapid constriction or narrowing of our pupils. By minimizing incoming light exposure during these intense situations, our eyes shield themselves from potential damage while maintaining optimal vision quality. Through this extraordinary artwork by Science Photo Library, viewers are invited to marvel at both the anatomical intricacies and functional brilliance behind one of nature's most awe-inspiring creations –the human eye.
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