The human lens focuses light on the photoreceptor cells by changing shape.
• The eyes of human beings possess a single lens that focuses by modifying its shape. In the eye of a human, the flexible lens and cornea focus light on the photoreceptor cells in the retina.
• When the light enters the eye, it passes via the cornea, which gets bent and aims the light upon the lens.
• The pupil monitors the amount of light, which moves into the eye. The lens then projects the light onto the retina, giving rise to an inverted image. The shape of the lens get change to adjust the focus on both the near and far off objects, this phenomenon is called accommodation.
Thus, the shape of the lens gets change to focus light on the photoreceptor cells.
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