--%>

How can the visual deficiencies recognized as myopia

How can the visual deficiencies recognized as myopia and hypermetropia be optically explained?

E

Expert

Verified

Myopia is visual situation in which images are formed before (in front of) the retina. Hypermetropia is visual condition in which point of image formation is beyond (behind) retina. Actually myopia is due to a raise in distance between retina and crystalline lens, mainly caused by the slight flattening of eyeball. In hypermetropia the retina is too close to the crystalline lens because of slight shortening of eyeball.

In myopia near point and far point of the vision come closer (the refractivity of crystalline lens which corresponds to maximum distension capacity of ciliary muscles is not enough to offer visual accommodation). In hypermetropia the ciliary muscles are not capable to contract more to compensate the inadequate position of retina, that is, the near point becomes more distant.

   Related Questions in Biology

  • Q : Define the term direct development

    Define the term direct development? Is there a larval phase in the planarias?

  • Q : Define Customer Service Customer

    Customer Service: This can refer to the practice of giving people with a positive, useful experience before, after or during buying something. This also can consider as a department inside a company which focuses on these processes. Idyllically, every

  • Q : Intra-cellular digestion On which

    On which organelle of the cell structure does intra-cellular digestion based? Name the chemical content of such organelles?

  • Q : Which disease occur due to lack of

    Which disease takes place due to the lack of vitamin "D"? Answer: Rickets is the disease that takes place due to the deficiency of vitamin "D".

  • Q : Metabolic gases which are transported

    What are the two main metabolic gases which are transported by the blood? Answer: The main metabolic gases which are transported by the blood are molecular oxygen (O

  • Q : What do you mean by parthenogenesis

    What do you mean by parthenogenesis? Brifly explain the term.

  • Q : Explain Matrix Management Matrix

    Matrix Management: It is a style of management where an individual has two reporting superiors (that is, bosses) - one functional and the other operational. This is generally seen in the project management where an

  • Q : Perceptual Distortion - Organizational

    This occurs because of attribution on two counts: I. Fundamental attribution error: the tendency to underestimate the influence of external factors and overestimate the influence of internal factors when making judgments about the behavior of others. II. S

  • Q : Blastopore and archenteron Explain the

    Explain the blastopore and archenteron? Which is the stage of embryonic development where these structures are formed? Specify the destinations of archenteron and of blastopore?

  • Q : Cooling of tissues and organs for

    How is the cooling of tissues and organs for medical transplants related with the consequence of temperature on enzymatic reactions?