Which structure is the clear tissue that covers the front of the eye where light enters?

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Multiple Choice

Which structure is the clear tissue that covers the front of the eye where light enters?

Explanation:
Light first passes through a clear, curved layer at the very front of the eye that covers the iris and pupil. This transparent tissue provides the eye’s major refractive power, bending incoming light so it can be focused onto the retina. Its transparency comes from being avascular, which keeps the light path unobstructed. This front, clear covering is the cornea. In contrast, the sclera is the white, opaque outer layer, the iris controls how much light enters by adjusting pupil size, and the retina sits at the back and detects light.

Light first passes through a clear, curved layer at the very front of the eye that covers the iris and pupil. This transparent tissue provides the eye’s major refractive power, bending incoming light so it can be focused onto the retina. Its transparency comes from being avascular, which keeps the light path unobstructed. This front, clear covering is the cornea. In contrast, the sclera is the white, opaque outer layer, the iris controls how much light enters by adjusting pupil size, and the retina sits at the back and detects light.

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