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

Isomerization of dihydroxyacetone phosphate, Isomerization of dihydroxyacet...

Isomerization of dihydroxyacetone phosphate Isomerization  of  dihydroxyacetone phosphate: Triosephosphate isomerase interconverts  dihydroxyacetone phosphate and  glyceralde

Function of noradrenaline in consciousness, Q. Function of Noradrenaline in...

Q. Function of Noradrenaline in consciousness? Increased level of noradrenalin is implicated in wakefulness. Locus coeruleus noradrenergic neurons decrease their rate of firing

Oogenesis, explain full about this process

explain full about this process

Differences between prokaryotic & eukaryotic cells, DIFFERENCES BETWEEN PRO...

DIFFERENCES BETWEEN PROKARYOTIC & EUKARYOTIC CELLS   S . N o .   CHA R AC T ERS   P R O K AR Y O T I C CELL

Classification of zoonoses disease , Classification of zoonoses More t...

Classification of zoonoses More than 300 zoonoses of diverse etiologies are recognized. Thus, a very large number of zoonoses call for classification, especially for teaching

Differentiation - morphogenesis and tissue organisation, Differentiation - ...

Differentiation - Morphogenesis and Tissue Organisation It should be clear to you that a single cell, the fertilized egg, gives rise to various structures that we mentioned. S

Discuss chemical examination of semen, Question 1 Discuss briefly the c...

Question 1 Discuss briefly the collection and examination of pericardial fluid Question 2 Discuss the following- A) Collection of CSF B) Physical examination o

Tissue valves -surgical techniques, Tissue Valves :  Tissue valves mo...

Tissue Valves :  Tissue valves mounted on a frame with a sewing ring are inserted by the same technique as used in the case of prosthetic valves.

Explain the enriched and living culture media, Explain the Enriched and Liv...

Explain the Enriched and Living Culture Media? Enriched Media - It is used for isolation of fastidious organisms, i.e., organisms having specific and elaborate nutritional requ

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