Question

Give reason : An object held very close to
the eye cannot be seen clearly​

Answer 1

$\large\boxed{\fcolorbox{blue}{yellow}{Answer:-}}$

The human eye can normally focus from about 25 cm (the near point) to infinity (the far point) by changing the focal length of the crystalline lens. For near vision, the focal length of the lens should be small. Contraction of the ciliary muscles relaxes the suspensory ligaments. This increases the curvature of the lens and decreases its focal length. There is a limit to which the contracting ciliary muscles can reduce the focal length of the lens. Thus, as an object is brought closer to the eyes, the latter can focus on the object for short durations with considerable strain or not focus at all. Hence, when an object is held very close to the eye, only a blurred image is formed on the retina.

Answer 2

If an object is held very close to our eyes the light reflected from it does not fall on the retina .It either falls in front of the retina or behind it or on the blindspot .Hence we cannot see an object if we held it very close to our eyes.

Hope it helps. And please mark as brainliest.