What is the main function of the cones in the eye?

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BlackTom AI · Accepted Answer

Question: What is the main function of the cones in the eye?

Option A: Vision in dim light
- This is primarily a function of the rods, not the cones. Rods are highly sensitive to low light and enable vision in dim conditions, whereas cones require brighter illumination. Therefore, attributing dim-light vision to cones is incorrect.

Option B: Colour vision
- Cones are the photoreceptor cells in the retina responsible for color perception. Humans typically have three types of cones (S, M, L) that detect short, medium, and long wavelengths, enabling color vision. This statement accurately reflects the main function of cones.

Option C: Accommodation for near vision
- Accommodation involves the lens adjusting its shape to focus on near objects, a process controlled by the ciliary muscle and lens, not the cones. While cones contribute to vision, their role is not to mediate accommodation.

Option D: Depth perception
- Depth perception arises from multiple cues, including binocular disparity, motion parallax, and distance information, as well as processing from various retinal cells. While cones participate in high-acuity vision, depth perception is not a primary function assigned to cones themselves. This option misattributes depth processing to cones directly.

Option E: Vision in night
- Night vision is dominated by rods, which function well in low light. Cones do not mediate night vision; this statement incorrectly assigns night-time visibility to cones.

Summary of reasoning across options:
- A misattributes dim-light vision to cones; correct mechanism is rods.
- B correctly identifies color vision as the cone-mediated function.
- C confuses cones with lens accommodation; the mechanism is separate.
- D overstates a direct cone role in depth perception, which relies on multiple cues and neural processing beyond cones alone.
- E incorrectly assigns night vision to cones; rods are responsible for night vision.

Understanding these distinctions helps clarify why color vision is the defining function of cones, while other visual capabilities are supported by rods or higher-level processing.

What is the main function of the cones in the eye?

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What is the main function of the cones in the eye?

查看解析

登录即可查看完整答案

类似问题

The term Blank ______ refers to seeing three wavelengths of color, where as the term Blank ______ refers to seeing two wavelengths of color.

Question at position 49 Which part of the retina, if any, has the best color vision? The peripheryThe foveaAll areas have equally good color vision The area surrounding the blind spot

Which of the following is the best explanation for our perception of color?

Neurones in primary visual cortex (V1) cannot be the physiological substrate for the cardinal axes because...

Neurones in the LGN cannot be the principal physiological substrate for the cardinal axes because..

Although the retinas of tetrachromats contain two different types of L-cones, tetrachromats cannot actually see additional colors.

Which of the following statements about human color vision is/are true?

更多留学生实用工具

希望你的学习变得更简单

The term Blank refers to seeing three wavelengths of color, where as the term Blank refers to seeing two wavelengths of color.