Customer Service Chat
Get quote & make Payment
Eye lens, Biology
In lumen of eye ball, a large colourless, transparent, more convex on back side, lens present covered by lens capsule.
When white tissues are formed in it, it becomes less transparent. So
Refrective index of lens is 1.42.
In lens yellow pigment present to check harmful sun rays.
Lens is fixed in position.
From cilliary body suspensory ligaments or
zonulla of zinn
are given out to keep lens in fixed position.
On relaxing of suspensory ligaments, focal length of lens is reduced.
Lens divides lumen into 2 unequal chambers.
Anterior small aquous chamber & posterior large vitrous chamber.
Aqueous chamber is filled by aquous humour (watery fluid).
Vitrous chamber is filled by vitrous wharton's jelly humour (formed during development in embryo only once).
Vitreous humour is dense contains 99% H O, remaining 1% vitrein protein, hyalorunic acid & collagen fibres.
s humour maintains shape of eye ball by turger pressure.
Around vitrous humour hyloid layer present.
In retina a blind spot present where no rods & cones are present.
In vitrous humour upto blind spot a hyloid canal is present.
Intralocular pressure (pressure of aquous + vitrous humour) is about 20 - 25 mmHg. optical axis touches retina to a point or area i.e
yellow spot or macula lutea
. Here xanthophill pigment is present.
Its central part is
Here only cones are obliquely placed so enlarged image is formed.
Posted Date: 10/3/2012 4:20:14 AM | Location : United States
Ask an Expert
Eye lens, Assignment Help, Ask Question on Eye lens, Get Answer, Expert's Help, Eye lens Discussions
Write discussion on Eye lens
Your posts are moderated
Write your message here..
Solubility, Solubility You are aware that gases are soluble in liquid...
Solubility You are aware that gases are soluble in liquid. Solubility of a gas in a liquid depends on the partial pressure, temperature and presence of other solutes. Table
Trans myocardial laser re vascularisation, Trans Myocardial laser re vascul...
Trans Myocardial laser re vascularisation (TMLR) : Patients who have severe angina and diffuse coronary artery disease with no graftable vessels are at limes subjected to TMLR. I
Excretion, what is the composition of urine in fishes and reptiles ?
what is the composition of urine in fishes and reptiles ?
Ureotelism - excretion, Normal 0 false false false EN-I...
Normal 0 false false false EN-IN X-NONE X-NONE MicrosoftInternetExplorer4
Genetic, What is genotype
What is genotype
Name the term when maximum arterial pressure is attained, At the end of the...
At the end of the ventricular contraction, maximum arterial pressure is attained and blood flow is most rapid. This is correctly termed the: a) Arterial maximum b) Diastolic
What is the role of the ozone layer for living beings, Q. What is the role ...
Q. What is the role of the ozone layer for living beings? The Ozone, O3, is a gas of the atmosphere that filters ultraviolet radiation from the sun disallowing most of that rad
Describe the theory of darwins, Describe the theory of Darwin's? Most s...
Describe the theory of Darwin's? Most scientists today accept the theory that living organisms have evolved according to the concept that was first proposed by Charles Darwin i
PLASMODIUM LIFE CYCLE, elucidate a life cycle of a plasmodium that causes m...
elucidate a life cycle of a plasmodium that causes malaria
What is the difference between rna and dna, Q. Concerning the nitrogen- con...
Q. Concerning the nitrogen- containing bases that participate in nucleotides, what is the difference between RNA and DNA? In DNA nucleotides can be formed of thymine (T), adeni
Accounting Assignment Help
Economics Assignment Help
Finance Assignment Help
Statistics Assignment Help
Physics Assignment Help
Chemistry Assignment Help
Math Assignment Help
Biology Assignment Help
English Assignment Help
Management Assignment Help
Engineering Assignment Help
Programming Assignment Help
Computer Science Assignment Help
IT Courses and Help
Why Us ?
~24x7 hrs Support
~Quality of Work
~Time on Delivery
~Privacy of Work
Human Resource Management
Literature Review Writing Help
Follow Us |
T & C
Copyright by ExpertsMind IT Educational Pvt. Ltd.