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How do tears work?

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How do tears work?

Picture
source: National Eye Institute
 ​​The eye ball near fails to fascinate me.
Check out here on how the different layers of your tears are produced. 

Dr. Yan L. Liang, OD
Markham  Optometrist
www.MarkhamOptometry.com

Contact Warden Optometry to book your vision and health consult.
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