Explain about the term accommodation, Biology

Assignment Help:

Explain about the term accommodation.

Normally, the human eye focuses at objects at infinity, without exerting any power. This implies that while a person is observing an object at infinity, the eye is at rest and no effort is needed to focus on the object. If the object moves closer from infinity, till a distance of 6 meters from the eye, still no additional power or effort is required to be able to focus on the object. However when an object moves closer than 6 meters, the light rays entering the eye from the objects is more divergent. So as to bring these divergent light rays into focus over the retina the diopteric power of the eye must be increased. The mechanism by which the eye increases its diopteric power and hence the ability to focus at an object close to 154 the eye is called Accommodation.

1934_Ray of light focussed behind the retina.png

Ray of light focussed behind the retina (dotted line) before accommodation, and on the retina (solid line) with the help of accommodation


Related Discussions:- Explain about the term accommodation

Explain the advantages of double beam method, Explain the Advantages of Dou...

Explain the Advantages of Double Beam Method? The double beam method has advantage over single beam as it automatically corrects, for the change in light transmission, through

What are those phyla, Q Beings from four phyla of the animal kingdom "breat...

Q Beings from four phyla of the animal kingdom "breath" (do gas exchange) by diffusion. Which are those phyla? How is this type of respiration associated to features present in tho

Describe the examination of abdomen, Describe the Examination of Abdomen ? ...

Describe the Examination of Abdomen ? The contour of abdomen is to be recorded. Normally the abdomen is scaphold in sharp in a young adult. In case of fullness and bulge presen

Syngamy - reproduction, Normal 0 false false false EN-I...

Normal 0 false false false EN-IN X-NONE X-NONE MicrosoftInternetExplorer4

Explain about harvesting autogenous bone grafts, What are the precautions t...

What are the precautions to be taken when harvesting autogenous bone grafts from mandibular symphysis and ramus? When harvesting grafts from the mandibular symphysis region, fo

What is the speech perception test, What is the Speech Perception Test ...

What is the Speech Perception Test The subject is asked to listen to a series of 60 sounds, each of which consists of a double e digraph with varying prefixes and suffixes. The

How many grams of kanamycine would dissolve, To make a 40 mg/mL solution of...

To make a 40 mg/mL solution of kanamycin (MW 582.6) how many grams of kanamycine would you dissolve in 500 mL of water?

Explain nutritional effects of hemicelluloses, Nutritional effects Of Hemic...

Nutritional effects Of Hemicelluloses Hemicelluloses are classified under the category of soluble dietary fibers.  Hemicellulose is an indigestible complex carbohydrate that ab

Uses of plural embryos, Uses of Plural Embryos Although the basic tha...

Uses of Plural Embryos Although the basic that trigger causes polyembryony are not fully understood, there has been no dearth of interest in exploiting supernumerary embryos.

Justify the term – flagella, In protozoans flagella are found always one pe...

In protozoans flagella are found always one per cell. Flagella and Cilia can generate substantial force as they try to push or pull a protozoan through water. To be able to do that

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