36) As we age the lens loses its ability to A) block harmful radiation. C) bend

Question

36) As we age the lens loses its ability to A) block harmful radiation. C) bend light strongly B) assume a "flattened" shape D) constrict. 37) The lateral geiniculate nucleus is NOT A) built like a club sandwich. C) folded into shape of bent knee. B) retinotopically mapped D) located in the occipital lobe. 38) Damge to the parvocellular system A) impairs depth perception. B) causes little effect if the magnocellular system remains intact. C) Results in color visiondeficits. D) impairs motion perception 39) The following is NOT TRUE about retinal ganglion cells known as Konicellular cells (K cells). A) They get inut from the blue cones found in the fovea. B) They are the same in number (quantity) as the M cells. C) They get input from blue cones. D) The K Cell pathway is heavily involved in color vision based on a blue-yellow comparison. 40) Studies of brain regions responsible for visual infomation processing reveal A) that certain processing regions are enlarged in the brains of chess masters. B) that the boundaries between visual areas are indistinct. C) that over 50% of the total cortex is involved in vision. D) that there are signiicanr differences between human and mmonkey brains.

Explanation / Answer

Individuals in their growing years or rather old-age develop Presbyopia. Presbyopia refers to the ability to lose the elasticity or flexibility to change focus for different distances. When the light rays fall on the lens, the more it bends, the better can it reflect on the retina helping us focus on different distances. As we age, the lens loses it's ability to bend which results in older people not being able to see properly from different distances. For instance, when your grandmother asks you to pass a thread from a needle, you understand that she is getting old and her eyes are getting weaker. However, it is the lens of her eye which is getting weaker which loses it's flexibility to bend to let the light rays pass onto the retina for better vision.

Thus, the correct answer is option C.

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