Question

The light-rays pass through different parts of the eye in order to convert light energy to a neural code. Arrange the following in their correct sequence of light passes through:
A. Pupil
B. Cornea
C. Retina
D. Lens
Choose the correct answer from the options given below:

• A. A, B, C, D
• B. A, C, B, D
• C. B, A, D, C
• D. C, B, D, A

Hint:

Think of the eye like a camera: Light passes through the outer protective layer ({Cornea}), through the aperture ({Pupil}), is focused by the camera's lens ({Lens}), and finally hits the film or sensor at the back ({Retina}).

Answer 1

The Correct Option is C

Step 1: Understanding the Concept:
The question asks for the correct sequence of structures that light passes through as it enters the eye and travels to the photoreceptor cells where transduction occurs.
Step 2: Detailed Explanation:
The path of light through the eye is as follows:
B. Cornea: Light first enters the eye through the cornea, the transparent outer layer at the front of the eye. The cornea does most of the focusing of the light.
A. Pupil: After passing through the cornea, light goes through the pupil, which is the opening in the center of the iris. The iris controls the size of the pupil to regulate the amount of light entering.
D. Lens: The light then passes through the lens, which fine-tunes the focus by changing its shape (a process called accommodation) to project a clear image onto the back of the eye.
C. Retina: Finally, the focused light strikes the retina, the light-sensitive layer at the back of the eye. The retina contains photoreceptor cells (rods and cones) that convert the light energy into neural signals.
The correct sequence is B \(\rightarrow\) A \(\rightarrow\) D \(\rightarrow\) C.
Step 3: Final Answer:
The correct sequence for the passage of light is B, A, D, C.