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

Physiology of respiration, PHYSIOLOG Y OF RESPIRATION - 1 .      EXC...

PHYSIOLOG Y OF RESPIRATION - 1 .      EXCHANGE OF GASES - It is Haemotasis. It takes place in Alveoli between alveolar air and arterial cappilary by diffusion i.e., f

What is the protein denaturation, Q. What is the protein denaturation? Is t...

Q. What is the protein denaturation? Is there any change in the major structure when a protein is denatured? Secondary, tertiary and quaternary structures of proteins are spati

How many different gene types are possible, In lab rats, hair color and tex...

In lab rats, hair color and texture are controlled by two genes, the A gene for color and the B gene for texture. in both of these genes, the alleles show no dominance to each othe

Can you explain para-sternal view, Q. Can you explain Para-sternal View? ...

Q. Can you explain Para-sternal View? Various congenital anamolies can be detected in this view are perimembranous VSD (transducer anbled towards right hip), doubly commit

Explain procedure for analysis of air of processing facility, Explain Proce...

Explain Procedure for Analysis of Air of Processing Facility? Now conduct the experiment following the steps enumerated herewith: 1. Label the Petri plates with nutrient aga

Sheep-pox, Sheep-pox Sheep-pox, a highly contagious disease, causes a m...

Sheep-pox Sheep-pox, a highly contagious disease, causes a mortality of 20 to 50% in animals below the age of 6 months. It also causes damage to the wool and skin in adults. Of

What are the temporal factors of abnormality, What are the Temporal Factors...

What are the Temporal Factors of Abnormality Given the on going schedule of postnatal neurodevelopment, the age of the child at the time of exposure and the behaviour can have

Explain rabies, Rabies  Rabies is highly prevalent in Africa, India, As...

Rabies  Rabies is highly prevalent in Africa, India, Asia and parts of Latin America, but the risk to travelers is low. Pre-exposure immunizationagainst rabies is recommended f

Explain the potential benefits of micro nutrients, Explain the Potential Be...

Explain the Potential Benefits of micro nutrients? The potential benefits of micro nutrients should also be taken into account when the nutrient allowances are defined for olde

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