What are the physical properties of tear film, Biology

Assignment Help:

What are the physical properties of Tear Film?

Physical Properties of Tear Film: The tear film is a three-layered structure as given below:

1) Outermost Layer: Lipid Layer

This layer is secreted by the meibomian glands and is 0.1 mm thick. The main function it performs is to spread over the liquid layer and retard the evaporation of the aqueous layer and maintain the stability of the tear film.

2) Middle Layer: Aqueous Layer

Forms a bulk of the tear film and is secreted by the main and accessory lacrimal glands. It contains essential nutrients and substances necessary for the health and integrity of the cornea. It is approximately 7 mm in thickness.

3) Inner Layer: Mucin Layer

Mucin layer is secreted by the goblet cells of the conjunctiva. This layer is approximately 1 mm thick and functions to convert the hydrophobic corneal epithelium to hydrophilic, allowing the aqueous layer to spread over it.


Related Discussions:- What are the physical properties of tear film

Phylum platyhelmenthiese, show heading wise characteristics of phylum platy...

show heading wise characteristics of phylum platyhelmenthiese

Explain methods and vectors, Match each of the methods or vectors below to ...

Match each of the methods or vectors below to an appropriate form of gene therapy, assigning two methods or vectors to each form. Use each method or vector only once. Methods/v

Explain iron balance and regulation of iron absorption, Explain Iron Balanc...

Explain Iron Balance and Regulation of Iron Absorption? The body has three unique mechanisms for maintaining iron balance. The first is the continuous reutilization of iron fro

Explain the term- cerebral ischemia, Explain the term- Cerebral Ischemia ...

Explain the term- Cerebral Ischemia Ischemia refers to any of a group of disorders in which the symptoms are caused by vessel blockage preventing a sufficient supply of blood t

Run off-water cycle, Run off Some of the rainfall is soaked into the so...

Run off Some of the rainfall is soaked into the soil and excess water flows over the land surface along the natural slope of the area. Run off is the main source of water for l

Advantages of stage two done with tissue punch, Advantages of Stage two don...

Advantages of Stage two done with tissue punch - Less traumatic to surrounding tissue - Faster progress to the impression procedure - No sutures required

Wbcs types, mode of action of wbcs types

mode of action of wbcs types

Deficiency diseases-predisposing factors, Predisposing factors The inc...

Predisposing factors The incidence of metabolic diseases in cows and buffaloes increases as the milk production increases and the herd size becomes larger. The highest inciden

Herb stage - xerarch, Herb Stage - Xerarch The Soil-forming and soil-h...

Herb Stage - Xerarch The Soil-forming and soil-holding reactions of the mosses are so pronounced that the seeds of various xerophytic herbs, especially short-lived annuals: ar

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