The innermost layer of the eye is known as the retina which contains photoreceptors cells responsible for vision. Select the correct option which shows the characteristics of these cells.
Cones have three types of Opsin protein named erythrosin, cynopsin and chloropsin responsible for color vision.
— Concept: This question tests your understanding of the structure and function of photoreceptor cells (rods and cones)…Concept: This question tests your understanding of the structure and function of photoreceptor cells (rods and cones) in the human retina, specifically their role in vision and color perception.
Why (A) is correct: Cones are indeed responsible for color vision. There are three types of cones, each containing a specific opsin protein (photopigment) that is sensitive to different wavelengths of light. These are commonly referred to as erythropsin (red light), chloropsin (green light), and cyanopsin (blue light). This combination allows for the perception of a wide range of colors.
Why other options are wrong:
(B) Rods are responsible for scotopic (dim light) vision and are not majorly present in the macula lutea; the fovea (center of macula) is rich in cones. Photopic vision is bright light vision, primarily mediated by cones.
(C) Cones are primarily responsible for high-resolution (acuity) and color vision, especially in bright light. Rods provide low-resolution vision in dim light.
(D) Cones are responsible for photopic (bright light) vision and color vision, while rods are responsible for scotopic (dim light) vision.
Common Mistake: Students often confuse the roles of rods and cones, especially regarding their sensitivity to light intensity and their contribution to color vision and visual acuity.
NEET Tip / Mnemonic: Remember Cones for Color and Clarity (high acuity) in Constant (bright) light. Rods for Rough (low acuity) vision in Reduced (dim) light.
Correct Answer: (A)
Cones have three types of Opsin protein named erythrosin, cynopsin and chloropsin responsible for color vision.