What is visual accommodation, Biology

Assignment Help:

What is visual accommodation?

Visual accommodation is the phenomenon of varying the curvature of the crystalline lens to make possible the variation of its refractivity to adjust the images of objects precisely onto the retina. The visual accommodation is accomplished by the action of the ciliary muscles.

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

 


Related Discussions:- What is visual accommodation

Which term describes organisms which live in lake/ocean, Which term is used...

Which term is used to describe organisms that live on or in the bottom of an ocean or lake. Such organisms can be found anywhere from the shoreline to greatest ocean depths? a)

Explain the formation of enzyme, Explain the Formation of enzyme? Form...

Explain the Formation of enzyme? Formation of enzyme: Vitamin D is essential for the formation of two enzymes -  alkaline phosphtase in the intestinal lining (involved in cal

What is fermentation, What is Fermentation ? Fermentation is a process ...

What is Fermentation ? Fermentation is a process used by anaerobic organisms and certain cells of aerobic organisms, such as muscle cells deprived of oxygen, to obtain addition

Define blood pressure, Blood Pressure Blood pressure may be defined as ...

Blood Pressure Blood pressure may be defined as the force or pressure which the blood exerts on the walls of the artery. Blood pressure varies with the age of the individual. B

Enzymes, what happen to a denatured enzyme regarding its functionality? how...

what happen to a denatured enzyme regarding its functionality? how can that result be explained with the help of the lock and key model?

Why are lysosomes known as the cleaners of the cell waste, Q. Why are lysos...

Q. Why are lysosomes known as "the cleaners" of the cell waste? Lysosomes carry out heterophagic and autophagic digestion autophagic digestion by digesting residual substances

What are polyclonal antibodies, Antibodies of dissimilar specificities, whi...

Antibodies of dissimilar specificities, which react to the same antigen, are known as polyclonal antibodies.

Uses of grafting, Uses of Grafting Grafting helps to preserve and pe...

Uses of Grafting Grafting helps to preserve and perpetuate varieties that cannot reproduce by vegetative method. Grafting changes less useful varieties to more desirable

Similarities between chlorplasts and prokaryotic cells, What are the simila...

What are the similarities between chlorplasts and prokaryotic cells?

List some differences between a bacteria and a virus, Question 1: (a) L...

Question 1: (a) List some differences between a bacteria and a virus? (b) Define‘Swine Flu'. List the main types of ‘Swine Flu' viruses? (c) Describe the preventive measures

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd