Question

Study the following and pick up the correct statements:

The center of the posterior portion of the retina is called the macula lutea.
The site of the retina where the optic nerve exits the eye is called the blind spot.
Cones contain a visual pigment called iodopsin.
Rods contain a protein called rhodopsin.

• A. I only
• B. I and II only
• C. I, II and III only
• D. I, II, III and IV

Hint:

- The macula lutea is the region responsible for sharp vision, and the fovea within it has the highest concentration of cones. - The blind spot has no photoreceptors, making it insensitive to light. - Iodopsin enables color vision, while rhodopsin helps in low-light vision.

Answer 1

The Correct Option is D

Step 1: Understanding the Macula Lutea- The macula lutea is the central region of the retina, responsible for sharp central vision.- It contains a high density of cones, making it essential for detailed vision and color perception.
Step 2: Identifying the Blind Spot- The optic nerve exits the retina at a region known as the blind spot.- This area lacks photoreceptor cells, making it insensitive to light.
Step 3: Analyzing Photoreceptor Pigments- Cones contain the visual pigment iodopsin, which helps in color vision.- Rods contain the protein rhodopsin, essential for low-light (scotopic) vision.
Step 4: Conclusion- Since all four statements are scientifically correct, the correct answer is option (D)