5.
Give the meaning of the terms:
(a) Power of accommodation of the human eye
(b) Least distance of distinct vision
(c) Range of vision
Answers
Answer:
The term 'Power of accommodation' of human eye refers to the ability of an eye to change the focal length of the eye lens. ... To focus on distant objects the ciliary muscles relax making the eye lens thin. As a result the focal length of the eye lens increases and we see the distant objects.
optometry, the least distance of distinct vision (LDDV) or the reference seeing distance (RSD) is the closest someone with "normal" vision (20/20 vision) can comfortably look at something. In other words, LDDV is the minimum comfortable distance between the naked human eye and a visible object.
The distance between the near point and far point of the eye is known as range of vision. A normal eye is capable of seeing objects clearly from a far point up to near point of 25 cm.
Answer:
(a) The process by which the ciliary muscles change the focal length of an eye lens to focus distant or near objects clearly on the retina is called the accommodation of the eye.