Researchers from the Georgia Institute of Technology (USA) found that 22 species of mammals, including humans, length of eyelashes is one third width of eye, which provides eye health. Everything that is shorter or longer, including false eyelashes leads to more dust on the surface of the eye.
This is stated in a study published in the Journal of the Royal Society Interface.
“Lashes allow you to control airflow and evaporation rate from the surface of the cornea, says Guillermo Amador from Georgia Institute of Technology, author of the study. – When eyelashes are shorter than 1/3 width of the eye, it only marginally affects the condition. More dangerous when they are much longer than one third. In this case, they can contribute to the eye contact of the air particles and dust”.
Scientists drew attention to the fact that all the studied animal species (except elephant, which has very long eyelashes) have evolved with the same ratio of length to width of the lashes to the eye.
The team then built a wind tunnel to recreate the air flow, simulates the human eye. As cornea used Cup depth of 4 mm and a diameter of 20 mm. Mesh around the shape of the eyelashes.
Scientists have discovered the perfect length of the mesh to prevent evaporation and particle deposition. It helps the eyes stay moist for a long time and did not allow small particles to get into eyes. These lashes successfully defended his eyes with a strong air flow.
“That’s why long elegant false eyelashes are not perfect. They may look good, but not very useful for eye health”, the authors summarize scientific work.
Previously, we wrote about why it’s dangerous to go barefoot in the house.