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

How different are animal cells from plant cells, How different are animal c...

How different are animal cells from plant cells? Whereas plant cells are eukaryotic, autotrophic, photosynthetic and have chloroplasts and cell wall, the animal cells are eukar

Determine about the manganese, Determine about the Manganese   Manganes...

Determine about the Manganese   Manganese performs some functions in photosynthesis and acts to regulate the intake of certain elements and their oxidation states.   Several cr

Assessment of peripheral vascular perfusion (beside test), Assessment of Pe...

Assessment of Peripheral Vascular Perfusion (Beside Test) Burger's Postural Test Perform in daylight.  Place patient supine with both legs elevated and knees

What happens to the dna molecule when the ends, Now try to pull the strands...

Now try to pull the strands apart at the "origin of replication." What happens to the DNA molecule when the ends are restricted

What are genotypes and respective blood types of abo system, What are the g...

What are the genotypes and respective blood types of the ABO system? Ever since the alleles are IA, IB and i the possible genotypes are IAIA (blood type A), IAIB (blood type AB

Major organic molecules for living beings, Q. What are the major purposes o...

Q. What are the major purposes of the organic molecules for living beings? Organic molecules, like, lipids, carbohydrates and proteins perform several functions for living orga

Explain about the pulse vaccination, Explain about the Pulse vaccination? ...

Explain about the Pulse vaccination? How many doses of a given vaccine, administered to what people and on what schedule, permit eradication or control of an infectious disease

What are active and passive immunization, Q. What are active and passive im...

Q. What are active and passive immunization? According to the duration of the protection how do these types of immunization differ? Active immunization is that in which an anti

Importance of pituitary gland, Importance of pituitary gland Pitutar...

Importance of pituitary gland Pitutary gland is very small and it is about the size of a large pea seed. It is very important as it controls the functions of all the othe

How the sodium-potassium pump present in the cell membrane, How does the so...

How does the sodium-potassium pump present in the cell membrane work? What is the importance of this protein for the cell? The sodium-potassium pump is the transport protein th

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