All women dream of becoming the owners of long and lush eyelashes, because it's – an integral component of the charm of a woman's appearance. For this reason, mascara, which has a lengthening effect, was especially fond of the fairer sex. However, experts believe that the main thing in this case – do not overdo it, because too long eyelashes can harm the eyes.
Over the past 10-15 years, such a disease as "dry eye syndrome", or dry keratoconjunctivitis, has become one of the most common ophthalmic diseases. For the most part, cases of the disease are associated with the widespread use of computers, in particular tablets. However, excessively long eyelashes can also cause the syndrome.
Georgia State University scientists are concerned about the rapid spread of this disease and warn the fair sex about the possible danger.
In the process of evolution, nature has "determined" the optimal length of human eyelashes. They are shaped to protect the eyes from dust and small insects, as well as keep them from drying out. Thus, the "shadow of the eyelashes" forms a microclimate in which a stable temperature and humidity are maintained, providing protection for the cornea and conjunctiva.
American researchers decided to conduct a simple experiment. They created an enlarged model of the eye, consisting of aluminum hemispheres, which were filled with water, and a small branch of the wind tunnel was placed inside. When scientists fitted dummies of eyeballs with nylon eyelashes with a length proportional to the length of human eyelashes, evaporation from the surfaces of the hemispheres was halved. After the artificial eyelashes were lengthened, the researchers witnessed a paradoxical phenomenon: the level of evaporation from the surface of the "eyes" increased, and in addition, more dust began to settle on the hemispheres.
According to numerous measurements made among people of different ages and sexes, as well as among animals of different species, the length of the eyelashes is generally 1/3 of the width of the eye.
Source estet-portal.com
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