Explain near point and far point of a human eyes.

1.	Explain near point and far point of a human eyes.
Answer» ong>Answer: Near point Of Eye; In visual perception, the near point is the closest point at which an OBJECT can be placed and STILL form a focused image on the retina, within the eye's accommodation range. The other limit to the eye's accommodation range is the far point. A normal eye is considered to have a near point at about 11 cm (4.3 in) for a thirty year old. The near point is highly age dependent (see accommodation). A PERSON with hyperopia or presbyopia WOULD have a near point that is farther than normal. Sometimes, near point is given in diopters (see Presbyopia § Mechanism), which refers to the inverse of the distance. Far Point of Eye; in visual perception, the far point is the farthest point at which an object can be placed (ALONG the optical axis of the eye) for its image to be focused on the retina within the eye's accommodation. It is sometimes described as the farthest point from the eye at which images are clear.

Answer»

ong>Answer:

Near point Of Eye;

In visual perception, the near point is the closest point at which an OBJECT can be placed and STILL form a focused image on the retina, within the eye's accommodation range. The other limit to the eye's accommodation range is the far point.

A normal eye is considered to have a near point at about 11 cm (4.3 in) for a thirty year old. The near point is highly age dependent (see accommodation). A PERSON with hyperopia or presbyopia WOULD have a near point that is farther than normal.

Sometimes, near point is given in diopters (see Presbyopia § Mechanism), which refers to the inverse of the distance.

Far Point of Eye;

in visual perception, the far point is the farthest point at which an object can be placed (ALONG the optical axis of the eye) for its image to be focused on the retina within the eye's accommodation. It is sometimes described as the farthest point from the eye at which images are clear.