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

Pulmonary regurgitation, Pulmonary Regurgitation :  Most of the clinical c...

Pulmonary Regurgitation :  Most of the clinical cases are after balloon valvotomy or surgical valvotomy using a trans annular patch. It can be quantified by Echocardiography and D

Tissue culture, Note on production of haploid by tissue culture.

Note on production of haploid by tissue culture.

Explain the process of degradation of proteins, Q. Explain the process of D...

Q. Explain the process of Degradation of Proteins? Proteins are composed of amino acids combined by peptide linkages. The native proteins are resistant to attack by microo

How many are the well-known amino acids, Q. How many are the well-known ami...

Q. How many are the well-known amino acids that form proteins in living beings? There are twenty different known amino acids that form proteins related to the genetic code of t

Mitral valve replacement -mitral valve disease, Mitral Valve Replacement : ...

Mitral Valve Replacement :  Patients who require surgery and are not candidates for BMV, CMV or OMV should have mitral valve replacement (MVR). Types of Surgery for Mitra

Reciprocal crosses , RECIPROCAL CROSSES Similar results were obtained w...

RECIPROCAL CROSSES Similar results were obtained with reciprocal crosses also. A reciprocal crosses involves the same traits but carried by sexes opposite to those in the origi

How to derive a mathematical equation, A microbiology student isolated a hy...

A microbiology student isolated a hypothetical bacterial cell that seems to quadruple every generation. Knowing that binary fission is an exponential function, derive a mathematica

Birth and developmental history -assessment, Birth and Developmental Histor...

Birth and Developmental History -Assessment  Collection of information regarding a child's early development usually begins with the mother's pregnancy, labour and delivery, an

Nursing responsibilities while administering immunization, NURSING RESPONSI...

NURSING RESPONSIBILITIES WHILE ADMINISTERING IMMUNIZATION Use one sterile syringe and needle for each injection.  Use only the diluent supplied along with measles and

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