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The process by which the eye changes its focus, by making the lens thicker and thinner
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The process by which the eye changes its focus, by making the lens thicker and thinner

User TchiYuan
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By changing its shape, the lens focuses light onto the retina. Through the action of small muscles (called the ciliary muscles), the lens becomes thicker to focus on nearby objects and thinner to focus on distant objects.
User Tik
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