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 function of the feet in molluscs, What is the function of the f...

What is the function of the feet in molluscs? How is the mollusc foot related to the name given to the classes of the phylum? The mollusc foot has the function of locomotion, s

Mode of nutition, What is the mode of nutrition of Ascaris?

What is the mode of nutrition of Ascaris?

Classification and justification of hemichordata, Q. Classification and Jus...

Q. Classification and Justification of hemichordata? Kingdom Animalia Animals; multicellular organisms with cells that lack a cell wall, many capable of inovement or movement o

Type specimen of class enteropneusta, Q. Type specimen of class enteropneus...

Q. Type specimen of class enteropneusta? Examine the specimen and note the following features: 1. Balanoglossus has a soft, elongated, worm-like body which has a ciliated surf

Acute rheumatic fever, Acute Rheumatic Fever   Rheumatic  fever is an i...

Acute Rheumatic Fever   Rheumatic  fever is an inflammatory disease that usually follows infection of upper respiratory tract with group A beta hemolytic streptococci. It  is c

Explain the ph meter - food microbiology, Explain the pH Meter - Food Micro...

Explain the pH Meter - Food Microbiology? pH is a negative logarithm of H+ ion concentration. Its value remains between 0 and 14. Pure water has a pH of 7 (neutral). pH value l

What are the inorganic substances, What are the processes that autotrophic ...

What are the processes that autotrophic beings use to produce organic material from inorganic substances? Autotrophic beings make organic material by photosynthesis or by chemo

Rejection of a transplant, Which of the following cells of the immune syste...

Which of the following cells of the immune system is most likely to be directly involved in the rejection of a transplant? Answer plasma cells eosinophils basophils T lymphocytes m

What do you understand by compound eye, What do you understand by Compound ...

What do you understand by Compound eye? The characteristic eye of the Arthropoda. It comprise many ommatidia, the basic optical unit of compund eye, grouped together to form 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