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

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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.


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