Question

The fovea of the eye is
A. Has the lowest light threshold
B. is a region of highest visual activity
C. contains only green and red cones
D. contains only rods

Answer 1

Hint: Our eyes are sensitive to light. They capture the light and reflect them which make it possible for us to see objects in the visible spectrum. There are various parts in our eyes which work together to make this whole vision easy. The pupil is the central dark dot in our eye.

Complete answer: Our eye is the sense organ which helps to reflect the light and make us see things visible.
The fovea is the central pit of macula lutea that is the yellow pigmented spot. It is also called fovea centralis located laterally to the blind spot. It has the maximum number of cons so has the maximum visuality.
Cons are the photoreceptor cells in the retina which are connected to daylight and colour vision.
Option A: has the lowest light threshold: it has the lowest light difference threshold in the photopic conditions only. Under the scotopic conditions, the light threshold increases.
Option B: is a region of highest visual activity: It has the maximum cons so gives the highest visual quality.
Option C: Contains only green and red cons: it gives the best and highest quality colourful vision so has blue, red and green cons.
Option D: contains only rods: it also contains cones so this statement is incorrect.

So the answer is option B: is a region of highest visual activity.

Note: Diabetes, high blood pressure is not good for the eyesight. They can cause vision loss. The rare eye colour in the world is green. Eye colour is known by genes. Watching any screen too close to your eyes will damage the eyes as it affects the focusing of the retina. The blue light from mobile phones or screens affects our eyes.