What are the functions of the eyelids, Biology

Assignment Help:

What are the functions of the Eyelids?

Functions of the Eyelids:

The eyelid makes the outer most layers, covering the eye. Because of its strategic position, the eyelid serves a very important function of acting as a physical barrier between the eye and the external environment. This barrier protects the eye from physical elements including heat, radiation, excessive light and most importantly a foreign particle (referred to as a "foreign body"), which could physically damage the delicate inner coats of the eye if the eyelids were not there. Their protective functions include blinking to remove dust particles. The eyelashes play n sensory role to detect the presence of an intruding element, which in turn initiates the protective mechanisms, i.e., blinking.

The eyelids play an important role in maintaining the health of the ocular surface and the physical position of the eye within the orbit. The significance of the lids in relation to the tear film needs to be clearly emphasised. Production of tears, reflex blinking to aid in distribution of tears, and closing of the eyelids which cause propulsion of tears in the direction of lacrimal puncta to facilitate drainage of the tears are among the most significant roles played by the eyelids. The lacrimal pump responsible for the filling and emptying of the lacrimal sac is intricately linked to the movement of the eyelids.


Related Discussions:- What are the functions of the eyelids

Clinical reasoning , Upon admission the DPU nurse notes: Fasting sta...

Upon admission the DPU nurse notes: Fasting status - fasted from 12 midnight, no morning medication taken. Consent - signed Pre anaesthetic check Test results

Describe the phylum arthropoda and metamorphosis, Describe the Phylum Arthr...

Describe the Phylum Arthropoda and Metamorphosis? More than one million different species of arthropods are estimated to exist on the earth today-more than all other animal spe

What is barfoed test and explain its principle, What is Barfoed's test and ...

What is Barfoed's test and its principle? This test is a specific test for monosaccharides. Principle This test is also a copper reduction test but differs from Fehling

Define reagents required and methodology for benedict test, Define reagents...

Define reagents required and methodology for Benedict Test? Reagents Required - Sugar solutions of glucose, fructose, galactose, maltose, lactiose, sucrose and starch.

Define hazard identification, Hazard identification We  start the proce...

Hazard identification We  start the process of  risk assessment by  first identifying  the hazard. The goal of hazard identification is to identification  potential adverse hea

Explain nelfinavir, Explain Nelfinavir (NFV, Viracept)  Nelfinavir is a...

Explain Nelfinavir (NFV, Viracept)  Nelfinavir is a commonly used protease inhibitor because it is well tolerated. It appears to be less potent than lopinavir/ritonavir or efav

What kind of exoskeleton do some molluscs present, Q. What kind of exoskele...

Q. What kind of exoskeleton do some molluscs present? Some molluscs, like gastropods and bivalves secrete an external calcareous carapace (the shell). Calcium carbonate is a fo

Control of soil pollution, Following steps must be taken: Domestic an...

Following steps must be taken: Domestic and industrial garbage should be profitably utilized. Compost pits and installation of Gobar-gas plant in rural areas must be encourag

Determine the adaptation to terrestrial life, Why can the amnion also be co...

Why can the amnion also be considered an adaptation to terrestrial life? The amnion is also an adaptation to dry land since one of its functions is to prevent desiccation of th

Benefit of hypothermic, Normal 0 false false false EN-I...

Normal 0 false false false EN-IN X-NONE X-NONE MicrosoftInternetExplorer4

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