The fibrous tunic of the eye includes which of the following components?

• A. Retina
• B. Lens
• C. Cornea
• D. Ciliary body

Answer: (C)

The fibrous tunic of the eye consists of two primary components: the sclera and the cornea. The cornea is the transparent front part of the eye that covers the iris and pupil, allowing light to enter while also providing a significant amount of the eye's total optical power. It is composed of several layers and plays a critical role in focusing light onto the retina.

In contrast, the retina is part of the inner tunic of the eye and is responsible for converting light into neural signals for vision. The lens, while vital for focusing light and maintaining clarity of vision, is not part of the fibrous tunic but rather the transparent structure that changes shape to help focus light. The ciliary body, which encircles the lens and helps control its shape, is also part of the vascular tunic, not the fibrous tunic. Therefore, the correct identification of the cornea as part of the fibrous tunic accurately represents its role and structure within the eye.