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

Deficiency diseases-calcium deficiency (hypocalcicosis), Calcium  deficien...

Calcium  deficiency (hypocalcicosis) Calcium deficiency or hypocalciosis is a sporadic condition occurring in a particular group of animals causing osteodystrophy. Aetiol

How can we control to occur campylobacteriosis diseases, How can we control...

How can we control to occur Campylobacteriosis diseases If a person is suffering from campylobacteriosis, he can take an antibiotic such as ciproflaxin or azithromycin. Erythro

Explain about bimodal diurnal pattern, Explain about bimodal diurnal patter...

Explain about bimodal diurnal pattern Animals that show a bimodal diurnal pattern have their activity controlled by two biological clocks -  one that controls the time of onset

Determine the food sources of iodine, Determine the Food Sources of Iodine?...

Determine the Food Sources of Iodine? Please note that unlike other minerals studied so far, like selenium, the iodine concentration in foods is highly variable and also depend

Ketosis, K e to s i s It is also known as acetonemia in bovines or...

K e to s i s It is also known as acetonemia in bovines or pregnancy toxaemia in sheep and is associated with ketonemia, ketonuria and low blood glucose. E t iol

Zoonoses disease-chikungunya, Chikungunya Chikungunya, a metazoonosis,...

Chikungunya Chikungunya, a metazoonosis, is caused by chikungunya virus belonging to genus Alphavirus of the family Togavirideae. The virus is transmitted by infected mosquito

Which features shared by typical birds and mammals, Which of the following ...

Which of the following characteristics is not shared by typical birds and mammals? A) Four chambered heart B) Milk production C) Four limbs D) Endothermy E) Insulating skin structu

Tropical seasonal forests - ecosystem, Tropical seasonal forests - Ecosyste...

Tropical seasonal forests - Ecosystem Tropical seasonal forests occur in regions where total annual rainfall is very high but segregated into pronounced wet and dry periods. T

How pathogenic bacteria cause diseases, What are some mechanisms by which p...

What are some mechanisms by which pathogenic bacteria cause diseases? Why is this knowledge important? Pathogenic bacteria have characteristics called as virulence factors that

What do you mean by current impediments, Q. What do you mean by Current Imp...

Q. What do you mean by Current Impediments? Given the impressive list of past achievements, we expect that quantitative process to biological problems will continue to repay us

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