What is meant by least distance of distinct vision? How does this vary between the very young and old people ?
Answers
ANSWER :
➡️ The minimum distance at which an object can be seen most distinctly without strain by the eye, is termed as least distance of distinct vision.
➡️For an infant, it is about 5 to 8 cm.
➡️For a young adult with normal vision, it is about 25 cm.
➡️For an old person, the power of accommodation of the eye decreases due to gradual weakening of ciliary muscles and the diminishing flexibility of the eye lens. Hence the least distance of distinct vision for him generally increases.
Answer:
Explanation:
Hey mate,.
It can be over came by using convex lens.
And We can observe an object within 25 cm only.
In very young children have strong ciliary muscles whereas in old people ciliary muscles are weak .
And power of accommodation will be loosen in old people.
Hope it will help you