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 are the consumer and producer surplus, What are the consumer and produ...

What are the consumer and producer surplus? Consumer and producer surplus: At equilibrium P 1 Q 1 (as point B, here demand equals supply) Consumer surplus:

What is the significance of pharyngeal gill slit, What is the significance ...

What is the significance of Pharyngeal gill slit ? Lateral opening in the wall of the pharynx which allows water to enter into the mouth and exit through the pharynx. This is on

What is atherosclerosis, Q. What is Atherosclerosis? Atherosclerosis is...

Q. What is Atherosclerosis? Atherosclerosis is an arterial lesion characterized by patchy thickening of the intima (innermost coal of artery) comprising of fat and layers of co

Explain the radiographic failure of root canal treatment, Explain the Radio...

Explain the Radiographic Failure of Root Canal Treatment It is the persistence or development of pathosis radiographically. Specifically, this is a radiolucent lesion that has

Is the ventricle lumen larger during diastole, Q. Is the ventricle lumen la...

Q. Is the ventricle lumen larger during diastole or during systole? During diastole the opposite occurs. The muscle fibers of the ventricles relax and the lumen of these chambe

What is primary motor cortex, Q. What is Primary Motor Cortex? Located ...

Q. What is Primary Motor Cortex? Located in precentral gyrus of frontal lobe (anterior to central sulcus, which separates frontal and parietal lobes.  Neurons called pyramidal

Deficiency diseases-thiamine deficiency (hypothiaminosis), Thiamine deficie...

Thiamine deficiency (hypothiaminosis) Thiamine deficiency is characterized by signs of nervous system. The primary  thiamine deficiency is not common in animals. However, seco

Describe the term epinephrine, Describe the term Epinephrine? Epinephri...

Describe the term Epinephrine? Epinephrine is administered IV in increments of 1 mg diluted in 10 mls of normal saline (1:10,000). It can be given through the endotracheal tube

Pits, PITS Depressions in secondary cell wall is called pit. A pi...

PITS Depressions in secondary cell wall is called pit. A pit present on the free cell wall surface without its partner is called Blind pit. It consists of 2 parts -

Hemoglobins - process of respiration, Hemoglobins - Process of Respiration ...

Hemoglobins - Process of Respiration Hemoglobins are the very well known of all respiratory pigments. The basic molecular unit of Hemoglobin contains a haem group bound to a

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