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

How does the nervous system get information, Q. How does the nervous system...

Q. How does the nervous system get information about the external environment, the organs and the tissues? Information about the conditions of the internal and external environ

What is the difference between anabolism and catabolism, What is the differ...

What is the difference between anabolism and catabolism? Metabolism comprises two opposing processes: anabolism and catabolism. Anabolism is a set of synthesis reactions that t

Hypothalamus gland, HYPOTHALAMUS - Hypothalamus develops from the ectod...

HYPOTHALAMUS - Hypothalamus develops from the ectoderm of the embryo. Location and Structure. It lies below or inferior to the thalamus. The hypothalamus is connected to t

Explain the difference among dna primase and dna polymerase, Which of the f...

Which of the following is not a difference among DNA primase and DNA polymerase? A. DNA primase can initiate replication of DNA de novo whereas DNA polymerase needs a short oli

Botany, economic importance of viruses and bacteria ?

economic importance of viruses and bacteria ?

Immediate cardiac care (24- 72 hours) after operation, Immediate Care (24...

Immediate Care (24- 72 hours) All monitoring and medications continued. Flushing of arterial lines are done at regular intervals with heparin flush as well as whenever art

How much milk require by patient in a day, How many protein require patien...

How many protein require patient in a day Patients who require high protein diets are encouraged to drink 600-800 mL of milk a day. Now, you must be wondering how one can consu

What are the main cellular functions of potassium, Q. What are the main cel...

Q. What are the main cellular functions of potassium? Moreover being important for the osmotic regulation and for the acid-base equilibrium (pH) potassium is fundamental for th

Emergence of contemporary biology, EMERGENC E OF CONTEMPORARY BIOLOGY - ...

EMERGENC E OF CONTEMPORARY BIOLOGY - 1 .       Aristotle (384-322BC) - Greek Classified animal species and arranged them in hierarchies. Formulated 'Great chain of

Values of dpd for plant cells under hypertonic media, Q. What are the value...

Q. What are the values of DPD for plant cells under hypertonic, hypotonic and isotonic media? In plant cells under hypertonic medium there is loss of water for the external, SF

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