Home
Class 10
PHYSICS
Does short sightedness (myopia) or long ...

Does short sightedness (myopia) or long sightedness (hypermetropia) imply necessarily that the eye has partially lost its ability of accomodation ? If not, what might cause these defects of vision ?

Text Solution

Verified by Experts

No, a person may have normal ability of acommodation and yet he may be myopia or hypermetropic. Infact, myopia may arise when length of eye ball gets elongated and hypermetropia may arise when length of eye ball gets shortened.
Doubtnut Promotions Banner Mobile Dark
|

Topper's Solved these Questions

  • THE HUMAN EYE AND COLOURFUL WORLD

    PRADEEP|Exercise Value Based Question|4 Videos

  • THE HUMAN EYE AND COLOURFUL WORLD

    PRADEEP|Exercise Problem For Practice|8 Videos

  • THE HUMAN EYE AND COLOURFUL WORLD

    PRADEEP|Exercise (Based)Short answer|11 Videos

  • SOURCES OF ENERGY

    PRADEEP|Exercise Mock Test|20 Videos

Similar Questions

Explore conceptually related problems

What is far-sightedness or hypermatropia? What cause hypermetropia How this defect is corrected ?

(a) What is long-sightedness ? State the two causes of long-sightedness (or hypermetropia). With the help of ray diagrams, show : (i) the ray-defect long-sightedness. (ii) correction of long-sightedness by using a lens. (b) What eye has a near point distance of 0.75 m. What sort of lens in spectacles would be needed to reduce the near point distance to 0.25 m ? Also calculate the power of lens required. Is this eye long-sighted or short-sighted ? An eye has a far point of 2 m. What type of lens in spectacles would be needed to increase the far point to infinity ? Also calculate the power of lens required. Is this eye long-sighted or short-sighted ?

Knowledge Check

  • The question below consist of a set of labelled sentences. These sentences, when properly sequenced form a coherent paragraph. Select the most logical order of sentences from among the options. P: A certain moral code of conduct is ultimately necessary to ensure that the society does not fall prey to degeneration of values, which would lead to rampant sufferings and ultimately chaos. Q: Society.s concerns are our concerns: anything capable of causing a detrimental impact on it in the short term or in course of time is ultimately bound to affect us and our children. R: When we talk about social morality of any kind, what comes into play is our ability to feel for the well-being of our society. S: It is a concern to help the society by safeguarding it from unwanted ills and malaise and ensuring its well- being that is at the root of social morality.

    A
    PSQR
    B
    RPSQ
    C
    QPSR
    D
    PQRS

  • The question below consists of a set of labelled sentences. These sentences, when properly sequenced form a coherent paragraph. Select the most logical order of sentences from among the options. P : Acertain moral code of conductis ultimately necessary to ensure that the society does not fall prey to degeneration of values, which would lead to rampant sufferings and ultimately chaos. Q : Society’s concerns are our concerns : anything capable of causing a detrimental impact on it in the short term or in course of time is ultimately bound to affect us and our children. R: When we talk about social morality of any kind, what comes into play is our ability to feel for the well-being of our society. S : It is a concern to help the society by safeguarding it from unwanted ills and malaise and ensuring its well-being that is at the root of social morality.

    A
    PSQR
    B
    RPSQ
    C
    QPSR
    D
    PQRS

    • Similar Questions

    Explore conceptually related problems

    What do we call the long sightedness caused by loss of elasticity of the lens of the eye ?

    What do we call the long sightedness caused by loss of elasticity of the lens of the eye ?

    (a) What is short-sightedness ? State the two causes of short-sightedness (or myopia). With the help of ray diagram, 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 ?

    What is hypermetropia (far-sightedness) ? What are its causes ? How can it be corrected ?

    A person suffering from the eye-defect myopia (short-sightedness) can see clearly only up to a distance of 2 meters. What is the nature and power of lens required to rectify this defect ?

    The question below consists of a set of labelled sentences. These sentences, when properly sequenced form a coherent paragraph. Select the most logical order of sentences from among the options. P: A certain moral code of conduct is ultimately necessary to ensure that the society does not fall prey to degeneration of values, which would lead to rampant sufferings and ultimately chaos. Q: Society’s concerns are our concerns: anything capable of causing a detrimental impact on it in the short term or in course of time is ultimately bound to affect us and our children. R: When we talk about social morality of any kind, what comes into play is our ability to feel for the well-being of our society. S: It is a concern to help the society by safeguarding it from unwanted ills and malaise and ensuring its well-being that is at the root of social morality

    Home
    Profile