--%>
Assignment Help - homework help

Description of visual accommodation

Give a brief description of visual accommodation?

E

Expert

Verified

Visual accommodation is phenomenon of varying the curvature of crystalline lens to create probable the variation of its refractivity to adjust images of objects exactly on retina. The visual accommodation is completed by the action of ciliary muscles.

The nitid vision depends on visual accommodation because, if the images are not projected on retina but in front or behind it, they will emerge blurred. The closer an object is more the ciliary muscles should compress the crystalline lens (increasing its curvature); the more distant an object is more the ciliary muscles should relax.

   Related Questions in Biology

  • Q : Single and multi-seeded fruits Explain

    Explain why there are some plants which are having single-seeded fruits and some fruits having more than one seed?

    		•
  • Q : Why is meiosis significant for the

    Why is meiosis significant for the maintenance of normal quantity of chromosomes of the species with sexual reproduction?

    		•
  • Q : Main human degenerative disease Write

    Write down the main human degenerative diseases?

    		•
  • Q : Extracellular and intracellular

    How different are extracellular and intracellular digestion? Describe the evolutionary benefit of extracellular digestion?

    		•
  • Q : Define Database Server Database Server

    Database Server: This is the term employed to refer to the back-end system of a database application employing client-server architecture. The back-end, sometimes termed as database server, performs tasks like storage, data analysis, data manipulation

    		•
  • Q : Description of anemia Give a brief

    Give a brief description of the term anemia? And also write down four main types of anemia?

    		•
  • Q : Describe osseous cavity Describe

    Describe osseous cavity and also state where the pituitary gland is positioned? Answer: The pituitary gland, or hypophysis, is positioned in the sella turcica of the

    		•
  • Q : Examples of representing beings-type of

    Mollusc identity card. How molluscs typified according to examples of the representing beings, type of symmetry, basic morphology, coelom and germ layers, respiratory system, digestive system, circulatory system, nervous system, excretory system and types of a reprodu

    		•
  • Q : How do sodium and potassium ions

    How do sodium and potassium ions maintain resting potential of the neuron?

    		•
  • Q : Target organs and tissues of

    Specify the target organs and the target tissues of neurohypophysis?

    		•