What do you mean by blinking and peering in the eyelid, Biology

Assignment Help:

What do you mean by blinking and peering in the eyelid?

Blinking and Peering:

Blinking considers as to the opening and closing movements of the eyelid. The function of blinking is to keep the cornea moist and clean, help in drainage of tears, and to eliminate blurring of images during eye movements. With each blinking movement, of the lids the eyeball moves upwards and inward, similar to the position the eye takes during sleep. In a coinplete blink the superior and the inferior fornices are compressed by the preseptal fibres and the eyelids move towards eat$ other, with the upper lid moving a greater distance and exerting more force on the globe. Peering refers to the act of looking at some object with great interest, In the process of peering both upper and lower eyelid lower down by 2.5 mm. Along with this the lower eyelid also moves medially by 1 mm.


Related Discussions:- What do you mean by blinking and peering in the eyelid

What are the biological functions of the polysaccharides, Q. What are the m...

Q. What are the major biological functions of the polysaccharides? Polysaccharides have a structural function and an energy storage function. Polysaccharides incorporated by li

Chest x-ray, Increase in cardio-thoracic ratio is a relatively specific ind...

Increase in cardio-thoracic ratio is a relatively specific indicator of left ventricular end-diastolic volume. Left atrial enlargement is seen as double density shadow, lifting up

Define precautions for testing quality of water, Define Precautions for Tes...

Define Precautions for Testing Quality of Water? 1. Handle the sewage water with care as it may contain enteric pathogens. 2. Sewage and pond water should be shaked before i

Difference between cryptogamic and phanerogamic plants, What is the differe...

What is the difference among cryptogamic and phanerogamic plants? Cryptogamic (hidden sex organs) plants are those that do not show flowers or seeds. They comprise the bryophy

Processed chicken products, P r o c esse d Chicken Products Prepar...

P r o c esse d Chicken Products Preparation of comminuted meat products is the best way to salvage meat from spent hens and broiler parent stock. Incorporation of whole eg

Cell membrane does not allow all dissolved substances, Why is it important ...

Why is it important that a cell membrane does not allow all dissolved substances to diffuse freely through it? If the cell membrane were freely permeable, harmful substances co

Plantae, significance of amoebozoa

significance of amoebozoa

What do you know zoological parks, Q. What do you know Zoological Parks? ...

Q. What do you know Zoological Parks? Zoological park has two faced aspects, the relationship between man and beast. There is awe and there is slaughter. There is worship and t

Define decreased oxygen availability at high altitude, Define Decreased oxy...

Define Decreased oxygen availability at high altitude (Hypobaric hypoxia)? The governing biophysical factor at high altitude is decrease in barometric pressure with increase in

Explain homogenization, Explain Homogenization Homogenized milk will n...

Explain Homogenization Homogenized milk will not be affected, as the fat globules are already broken up.  Homogenization increases the viscosity of whole milk but slightly dec

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