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 absorption of zinc - micro minerals, Define Absorption of Zinc - Mic...

Define Absorption of Zinc - Micro Minerals? Like iron, zinc also needs to be liberated from food prior to absorption. During digestive process; proteases, nucleases and hydroch

Define effect of antioxidants on athletes, Define effect of Antioxidants on...

Define effect of Antioxidants on athletes? Antioxidants like ascorbic acid (vitamin C), tocopherols (vitamin E), selenium, glutathione (GSH) Supplementation (singly or in combi

What is the importance of water for enzymatic activity, What is the importa...

What is the importance of water for enzymatic activity? Enzymes, biological catalysts, rely on water to reach their substrates and bind to them. There is no enzymatic activity

Principles of homeostasis with negative feedback, The principle of homeosta...

The principle of homeostasis is controlling the heating system with a simple thermostat in a house. These components are essentials thermometer, source of heat turning it on or off

Predation and coevolution, You now know that natural seleqtion aims at evo...

You now know that natural seleqtion aims at evolving adaptations of organisms in response to environmental changes in the inanimate world. Also many adaptations arise due to intera

Ethylene - dormancy, Ethylene - Dormancy Ripening of fruits involves a...

Ethylene - Dormancy Ripening of fruits involves a chain of cellular events like: Rise in the rate of respiration, Breakdown of higher carbohydrates into carboxylic

Camptotheca acuminata, This species is an ornamental tree in China, and has...

This species is an ornamental tree in China, and has yielded the clinically active agents topotecan, irinotecan, and 9 -aminocamptothecin, which are semisynthetically derived from

Social Determinants of Health, Normal 0 false false false ...

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

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