Cones are the special cells responsible for

• A. noncolor sensitivity to low light.
• B. color vision.
• C. focusing images on the retina.
• D. visual accommodation.

Answer: (B)

Verified step by step guidance

1. Understand the role of cones in the human eye: Cones are photoreceptor cells located in the retina that are primarily responsible for color vision and function best in bright light conditions.
2. Differentiate between cones and rods: While cones are responsible for color vision, rods are another type of photoreceptor cell that are more sensitive to low light and are responsible for noncolor vision in dim lighting.
3. Analyze the options given: The problem provides several options related to the function of cones, including color vision, focusing images on the retina, and visual accommodation.
4. Evaluate the options: Consider which of the options aligns with the primary function of cones. Cones are not responsible for focusing images on the retina or visual accommodation; these are functions related to the lens and other parts of the eye.
5. Conclude with the correct function: Based on the understanding of cones, identify that their primary role is in color vision, especially in well-lit conditions.