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In mammalian eye, the 'fovea' is the cen...

In mammalian eye, the 'fovea' is the centre of the visual field, where

A

high density of cones occur, but has no rods

B

the optic nerve leaves the eye

C

only rods are present

D

more rods than cones are found

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### Step-by-Step Solution: 1. **Understanding the Structure of the Eye**: The mammalian eye contains various parts, including the retina, which is crucial for vision. The retina has two types of photoreceptor cells: rods and cones. 2. **Identifying the Fovea**: The fovea is located at the center of the macula lutea, which is a specific area in the retina. It is important to note that the fovea is a specialized region. 3. **Photoreceptor Distribution**: In the fovea, there is a high density of cone cells. Cones are responsible for color vision and function best in bright light conditions. 4. **Absence of Rods in the Fovea**: Unlike other parts of the retina, the fovea does not contain any rod cells. Rods are more sensitive to low light and are primarily responsible for night vision. 5. **Visual Acuity**: The high concentration of cones in the fovea allows for the highest visual acuity, meaning that this area provides the sharpest and clearest vision. 6. **Conclusion**: Based on the characteristics of the fovea, the correct answer to the question is that the fovea is the center of the visual field where there is a high density of cones and no rods. ### Final Answer: The fovea is the center of the visual field where a high density of cones occurs but has no rods. ---
### Step-by-Step Solution: 1. **Understanding the Structure of the Eye**: The mammalian eye contains various parts, including the retina, which is crucial for vision. The retina has two types of photoreceptor cells: rods and cones. 2. **Identifying the Fovea**: The fovea is located at the center of the macula lutea, which is a specific area in the retina. It is important to note that the fovea is a specialized region. 3. **Photoreceptor Distribution**: In the fovea, there is a high density of cone cells. Cones are responsible for color vision and function best in bright light conditions. ...
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