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

Disorders of motor neurons and the spinal cord, Disorders of motor neurons ...

Disorders of motor neurons and the spinal cord A number of movement disorders are produced by damage either to the spinal cord or to cortical projections to the spinal cord. Th

What is clinical manifestation of the disease as daltonism, What is the cli...

What is the clinical manifestation of the disease known as daltonism? An X-linked daltonism is a disease in which the affected individual sees the red color as green or confoun

How is the nervous tissue distributed in cnidarians, Q. How is the nervous ...

Q. How is the nervous tissue distributed in cnidarians? Their nervous system is diffuse there are no ganglia or brain. Q. What are the kinds of reproduction presented by cn

Role of carbohydrates in dyslipidemia, Q. Role of Carbohydrates in dyslipid...

Q. Role of Carbohydrates in dyslipidemia? It is important to know about these carbohydrates, as they all differ in their digestive properties. The rate of absorption is variabl

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

What are the similarities between chlorplasts and prokaryotic cells?

Cytogenetics, describe five features of chromosomes used in cytogenetic ana...

describe five features of chromosomes used in cytogenetic analysis?

Explain understanding the response of farmers, Explain Understanding the re...

Explain Understanding the response of farmers? Understanding the response of the farmers by the government also influences the food production. Government policy influences the

Causes of heart failure, It is important to recognise underlying causes and...

It is important to recognise underlying causes and precipitating factors of heart failure for its appropriate management. That would also help in prevention and treatment of heart

Show major arthropod classes, Q. How are the three major arthropod classes ...

Q. How are the three major arthropod classes characterized according to the presence of antennae? Crustaceans have two pairs of antennae insects have one pair arachnids don't h

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