The clear tissue that covers the front of the eye

The clear tissue that covers the front of the eye

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

Answer: (A)

What this question is testing is which part of the eye is the clear, front-facing surface that light first passes through. That part is the cornea. It sits at the very front of the eyeball, is transparent, and lets light into the eye while helping to focus it as it enters. The iris is the colored ring that controls how much light enters by changing the size of the pupil. The retina lies at the back of the eye and detects light to send visual information to the brain. The sclera is the white, tough outer coating that protects the eye but isn’t transparent. So the clear tissue covering the front of the eye is the cornea.

What this question is testing is which part of the eye is the clear, front-facing surface that light first passes through. That part is the cornea. It sits at the very front of the eyeball, is transparent, and lets light into the eye while helping to focus it as it enters. The iris is the colored ring that controls how much light enters by changing the size of the pupil. The retina lies at the back of the eye and detects light to send visual information to the brain. The sclera is the white, tough outer coating that protects the eye but isn’t transparent. So the clear tissue covering the front of the eye is the cornea.