People Without Eye Lashes
Research shows that people with no lashes suffer higher than average rates of eye infection, than those who have eyelashes. This finding suggests that lashes have a protective function for the eyes. The most prevalent view is that lashes act as a net that catches airborne particles that would otherwise land in the eye, that lashes sense foreign bodies before they can harm the eye triggering a protective blink and that they shield some of the sun’s rays from entering the eye. However, Guillermo Amador, David Hu and other researchers at the Georgia Institute of Technology believe lashes don’t act as a shield themselves per se but rather change the air flow around the eyes creating a layer of protection made up of relatively still air. By reducing air flow over the cornea of our eyes, lashes keep particles away, and help retain moisture. The slow moving air acts as a protective layer of sorts.
Eye Lash Length
Eye-lash length is critical for creating a protective layer of slow moving air. If eye lashes are too long they act as a funnel, directing air into the eye and upsetting the protective layer. It turns out our lashes are the perfect length. Hu’s research in mammals concluded eyelash length across the eye is consistently one third the length of the animal’s eye. “What seemed to matter the most was not the total length of the eyelash, but how much it stuck out into the airflow,” Amador said.
Protecting Your Eyes
But don’t leave all the eye protection to your eye lashes. Always wear sunglasses when outdoors. Quality sunglasses, block glare, shield your eyes from dust, air, water and other particles and they block UVA/UVB rays which have been linked to eye maladies like macular degeneration, glaucoma, cataracts and more. If you wear eyeglasses, check out Solar Shield fitsovers and clipons at www.solarshield.com Get 40% with code BLOG40