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

What is the ph inside the stomach, What is the pH inside the stomach? Why i...

What is the pH inside the stomach? Why is there a need to keep that pH level? How is it maintained? Which are the cells that produce that pH? The normal pH of the gastric juice

How dna-rna hybridization occurs, Q. How DNA-RNA hybridization occurs B...

Q. How DNA-RNA hybridization occurs Both DNA and RNA are able to form hybrids in solution with other RNA or DNA molecules which have complementary base pairing. Double-stranded

How neural impulse is transmitted from one cell to another, Q. What is the ...

Q. What is the structure through which the neural impulse is transmitted from one cell to another? What are its parts? The structure through which the neural impulse passes fro

Uptake of iron by enterocytes - non-haem iron absorption, Define Uptake of ...

Define Uptake of iron by enterocytes - Non Haem Iron Absorption? Ferrous iron traverses the brush border of the intestine better than the ferric iron. The mechanism of absorpti

Baby delivery, some deliveries of baby occur early na. y is it so?

some deliveries of baby occur early na. y is it so?

Define role of vitamin k in controlling gene expression, Define role of Vit...

Define role of Vitamin K in controlling gene expression? Prithrombin, a protein required for blood clotting is assembled with a large number of glutamic acid residues. In the p

Industrial processes that use bacteria, Q. What are few industrial processe...

Q. What are few industrial processes that use bacteria? Bacteria are used by industry in different ways. There are vaccines made of antigens present in bacteria or of attenuate

What are retroviruses, What are retroviruses? How do they reproduce and wha...

What are retroviruses? How do they reproduce and what is the role of the enzyme reverse transcriptase? Retroviruses are viruses whose genetic material is RNA. HIV and the virus

Trypsin, Trypsin Trypsin is secreted by the pancreas in an inactive fo...

Trypsin Trypsin is secreted by the pancreas in an inactive form trypsinogen. It is activated by enterokinase secreted by the glands in the intestinal wall. As trypsin is forme

Name the reserve food materials in pheophyceae, Name the reserve food mater...

Name the reserve food materials in pheophyceae Ans) Reserve food materials in pheophyceae are laminarin and mannitol

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