- Trending Categories
- Data Structure
- Operating System
- MS Excel
- C Programming
- Social Studies
- Fashion Studies
- Legal Studies
- Selected Reading
- UPSC IAS Exams Notes
- Developer's Best Practices
- Questions and Answers
- Effective Resume Writing
- HR Interview Questions
- Computer Glossary
- Who is Who
Though a woman can see the distant object clearly, she cannot see the nearby objects clearly. She is suffering from the defect of vision called:(a) long-sight (b) short-sight (c) hind-sight (d) mid-sight
(a) long sight
Hypermetropia, also known as long-sightedness or far-sightedness, is a defect of vision in which a person can't see the nearby object clearly (appears blurred), though can see the distant objects clearly. The near point of a hypermetropic eye is more than 25 cm away.
This defect occurs either due to the low converging power of the eye lens, (because of its large focal length). Or, due to the eye-ball being too short, which causes light to focus beyond the retina, instead of directly on the retina.
It is corrected by using spectacles containing convex lenses, which should be of such a focal length (or power) that it forms a virtual image of the object (lying at the normal near point N of 25 cm) at the near point 'N' of the hypermetropic eye.
- Related Articles
- A person cannot see the distant objects clearly (though he can see the nearby objects clearly). He is suffering from the defect of vision called:(a) cataract (b) hypermetropia (c) myopia (d) presbyopia
- Difference Between Reflex Sight and Red Dot Sight
- Complete the following sentences:(a) A short-sighted person cannot see _________ objects clearly. Short-sightedness can be corrected by using _________ lenses.(b) A long-sighted person cannot see _________ objects clearly. Long-sightedness can be corrected by using _________ lenses.
- A perging lens is used in:(a) a magnifying glass (b) a car to see objects on rear side(c) spectacles for the correction of short sight (d) a simple camera
- (a) What is short-sightedness? State the two causes of short-sightedness (or myopia). With the help of ray diagrams, show:(i) the eye-defect short-sightedness.(ii) correction of short-sightedness by using a lens.(b) A person having short-sight cannot see objects clearly beyond a distance of 1.5 m. What would be the nature and power of the corrective lens to restore proper vision?
- Is love at first sight possible?
- How are we able to see nearby as well as the distant objects clearly?
- A person cannot see distant objects clearly. His vision can be corrected by using the spectacles containing:(a) concave lenses (b) plane lenses (c) contact lenses (d) convex lenses
- An old person is unable to see clearly nearby as well as distant objects. What kind of lens will be required to see clearly? Give reason.
- How to take care of your eye sight?
- Can a myotropic eye see distant objects clearly by seeing a reflection in the plane mirror?
- Explain clearly why, a person who has lost the sight of one eye is at a disadvantage compared with the normal person who has two good eyes.
- A person suffering from the eye-defect myopia (short-sightedness) can see clearly only up to a distance of 2 metres. What is the nature and power of lens required to rectify this defect?
- The near point of a long-sighted person is 50 cm from the eye.(a) Can she see clearly an object at: (i) a distance of 20 cm? (ii) at infinity?(b) To read a book held at a distance of 25 cm, will she need converging or perging spectacle lenses?
- Describe and explain, how a normal eye can see objects lying at various distances clearly.