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

Define about the ultraviolet rays - carcinogenic, Define about the Ultravio...

Define about the Ultraviolet rays - carcinogenic? Ultraviolet rays: There is ample evidence from epidemiological studies that ultra violet rays derived from the sun induce an i

Codon bias, Codon Bias  is the tendency for an organism or virus to make us...

Codon Bias  is the tendency for an organism or virus to make use of certain codons more than the others to encode a particular amino acid. A significant detrminant of codon bias is

Implementation of nursing care in acute rheumatic fever, Implementation of ...

Implementation of Nursing Care Provide Bed Rest and Comfort   Your major role as a nurse is to provide bed rest to the child and assist the child and parents to understa

Explain the most probable number (mpn) techniques, Explain the Most Probabl...

Explain the Most Probable Number (MPN) Techniques? Different procedures and media may be used depending on the food tested and the information sought. Media which can be used i

Draw a diagram of transverse section of mammalian bone, Draw a diagram of t...

Draw a diagram of transverse section of mammalian bone and label the following parts in it: (i) Haversian canal (ii) Lacuna containing osteocytes (iii) Canaliculi

Genetics Problems, Andalusian chickens may be either black, white, or gray....

Andalusian chickens may be either black, white, or gray. The gene for black is not dominant over the gene for white, nor is the gene for white dominant over the gene for black. Whe

Explain horizontal full mucoperiosteal flaps, Explain Horizontal Full Mucop...

Explain Horizontal Full Mucoperiosteal Flaps - Endodontic Surgery      a) Also called:  Envelope flap, b) Only a Horizontal incision, without the vertical releasing incision

Define etiology and clinical features of epilepsy, Define Etiology and Clin...

Define Etiology and Clinical Features of Epilepsy? This disorder usually starts in childhood, with the peak incidence between birth and two years. Etiological factors include

What is the tympanum, What is the tympanum? In which part of the ear is it ...

What is the tympanum? In which part of the ear is it located and what is its function? The tympanum (or ear drum) is a membrane located in the middle ear just after the auditor

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