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

Epidermis, EPIDERMIS - Ectodermal in origin. Outer part of skin. Mad...

EPIDERMIS - Ectodermal in origin. Outer part of skin. Made up of stratified epithelium. Branches of sensory nerves present. More branches on lips, tips of fingers. B

Describe how micrornas are able to influence gene expression, 1. Transcript...

1. Transcriptional analyses of eukaryotic cells reveal widespread production of RNA. Using specific examples describe how: a) microRNAs are able to influence gene expression.

Effect of metamorphic hormones on gene expression, Effect of Metamorphic Ho...

Effect of Metamorphic Hormones on Gene Expression Effect of metamorphic hormones on gene expression in moulting and metamorphosing insects, the first report of a particular ho

Sericulture, i want to know about sericulture for assignment degree level

i want to know about sericulture for assignment degree level

Define role of buffer in electrophoresis, Define Role of Buffer in Electrop...

Define Role of Buffer in Electrophoresis? Buffer ions have a two-fold purpose in electrophoresis, they carry the applied current, and they fix the pH at which electrophoresis i

What is sick sinus syndrome, Q. What is Sick Sinus Syndrome? Ans. ...

Q. What is Sick Sinus Syndrome? Ans. When a slow resting pulse fails to accelerate normally with exercise, it has been labeled chronotropic incompetence, however, there i

The regulation mechanism of glycogenolysis, The  regulation mechanism invo...

The  regulation mechanism involves: a)  The hormones catecholamines (epinephrine, norepinephrine) and glucagon cause the increase in CAMP levels in cells. This CAMP activates p

Minerals requirements during congestive cardiac failure, Q. Minerals requir...

Q. Minerals requirements during congestive cardiac failure? Minerals: Since sodium and potassium are the major electrolytes associated with oedema, it is important that sodium

Explain about the nucleoproteins, Explain about the Nucleoproteins? Nuc...

Explain about the Nucleoproteins? Nucleoproteins are combinations of nucleic acids land simple proteins, which usually consists of a large number of basic amino acids. Nucleopr

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