Which transparent layer covers the front of the eye and helps focus light?

Which transparent layer covers the front of the eye and helps focus light?

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

Answer: (B)

Light entering the eye is first focused by the cornea, the transparent, dome-shaped front surface. Its curved shape bends incoming light, providing most of the eye’s focusing power before light reaches the lens. The cornea’s clarity and curvature are essential for clear vision, and if it becomes cloudy or damaged, vision can blur. The lens behind it helps fine-tune focus but doesn’t cover the front of the eye. The retina is at the back where light is detected, and the sclera is the white outer layer. So the transparent front layer that helps focus light is the cornea.

Light entering the eye is first focused by the cornea, the transparent, dome-shaped front surface. Its curved shape bends incoming light, providing most of the eye’s focusing power before light reaches the lens. The cornea’s clarity and curvature are essential for clear vision, and if it becomes cloudy or damaged, vision can blur. The lens behind it helps fine-tune focus but doesn’t cover the front of the eye. The retina is at the back where light is detected, and the sclera is the white outer layer. So the transparent front layer that helps focus light is the cornea.