Eyelashes tend to grow much slower than hair on the scalp. Generally speaking, healthy eyelashes grow about 0.15 millimeters per day and are generally about seven millimeters long (beyond the skin). So, doing the math, it takes one to two months for a normal-length eyelash to grow from scratch, King says. In contrast, head hair can grow as fast as 1.1 millimeters per day.
If you're looking for medical or cosmetic treatment for your eyelashes, King says there are medications that can help increase the length and thickness of your eyelashes. Authors state that “eyelashes have evolved to protect the eyes from external pollution and excessive evaporation, and changes in eyelash length may reflect different congenital and non-congenital diseases. There are also cosmetic treatments, such as eyelash extensions and false eyelashes, that can help you recreate the look of your eyelashes if you've lost all your natural eyelashes. If you want to enhance your eyelashes or if you have a medical condition that affects eyelash growth, you should consult your healthcare provider to learn about treatment options.
The data also shows that excessively long eyelashes are just as unpleasant as eyelashes that are too short, something scientists call the “inverted U function of eyelash attractiveness”. The researchers, led by Farid Pazhoohi of the University of British Columbia in Canada, estimate that the optimal eyelash length for women is approximately one quarter to one third of the eye's width. For women who have the opposite problem to that of Danes, Surratt suggests using an eyelash curler and a few layers of lengthening mascara (her favorites are Precious Cells and Ultraflesh Panthera from Lancôme Définicils). Psychologists explain that long eyelashes create a contrast between the eye and the eyelid, making the eyes visibly larger and, therefore, more attractive.
The difference is in the shape of the eyelashes, since people of Asian origin and those of Spanish and Eastern European descent tend to have straight eyelashes, while others have curlier eyelashes. There are some life-saving cosmetics available on the market that can help you increase the length of your eyelashes. There are also several eyelash serums available without a prescription, which can help you have longer and thicker eyelashes, as well as some natural home remedies you can try. If you've lost all your eyelashes, King says the underlying reason for hair loss can influence whether or not your eyelashes grow back.
For example, in the case of alopecia areata, eyelash loss can last for months or years, according to King.