Which clear tissue covers the front of the eye?

Which clear tissue covers the front of the eye?

• A. Retina
• B. Cornea
• C. Iris
• D. Sclera

Answer: (B)

The front of the eye is covered by a clear, transparent tissue that lets light through and begins focusing it as it enters. This is the cornea. Its transparency and curved shape are essential for allowing light to pass into the eye and for starting the process of focusing. The retina is the light-sensitive tissue at the back of the eye, not at the front; the iris is the colored part that controls how much light enters by adjusting the pupil size; and the sclera is the tough, white outer layer that protects the eye. The cornea is the only front-facing tissue that is clear, making it the window through which light first enters the eye.

The front of the eye is covered by a clear, transparent tissue that lets light through and begins focusing it as it enters. This is the cornea. Its transparency and curved shape are essential for allowing light to pass into the eye and for starting the process of focusing. The retina is the light-sensitive tissue at the back of the eye, not at the front; the iris is the colored part that controls how much light enters by adjusting the pupil size; and the sclera is the tough, white outer layer that protects the eye. The cornea is the only front-facing tissue that is clear, making it the window through which light first enters the eye.