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: Concept Identification: The objective is to determine the correct order of structures light encounters from its entry into the eye to its arrival at the photoreceptor cells for transduction. Step 2: Path Elucidation: Light travels through the eye in the following sequence:
B. Cornea: Initial entry point for light, the transparent outer layer responsible for significant light refraction.
A. Pupil: The aperture controlled by the iris, regulating the volume of light entering the eye after the cornea.
D. Lens: Adjusts the focus of light precisely onto the retina through accommodation.
C. Retina: The posterior light-sensitive tissue containing photoreceptors (rods and cones) that convert light into neural signals.
The sequence is B $\rightarrow$ A $\rightarrow$ D $\rightarrow$ C.
Step 3: Conclusive Answer: The established pathway for light is B, A, D, C.