Eyelash extensions have become increasingly popular over the years, with more and more people opting for them to enhance their natural lashes. But have you ever wondered how they actually work? In this article, we’ll explore the science behind eyelash extensions and how they’re applied.

What are eyelash extensions?

Eyelash extensions are synthetic fibers that are attached to natural lashes using a special adhesive. They come in various lengths, thicknesses, and styles, and can be customized to suit individual preferences. When applied correctly, they can add length, volume, and curl to natural lashes, resulting in a fuller, more dramatic look.

How are eyelash extensions applied?

Eyelash extensions are applied using a meticulous process that involves isolating individual natural lashes and attaching a single extension to each one. The process typically takes between one to two hours, depending on the desired look and the expertise of the technician.

Here are the basic steps involved in the eyelash extension application process:

  1. Consultation: The technician will first consult with the client to determine their desired look, as well as any allergies or sensitivities they may have.
  2. Preparation: The technician will then prepare the client’s natural lashes by cleansing them and applying under-eye pads to protect the skin.
  3. Isolation: Using special tools, the technician will isolate each individual natural lash to ensure that the extensions are applied to one lash at a time.
  4. Application: The technician will then dip a single extension into a small amount of adhesive and carefully apply it to the base of the isolated natural lash, about 1mm away from the eyelid.
  5. Curing: Once the extension is applied, the technician will use a special tool to gently press it into place and ensure that it’s properly bonded to the natural lash. The adhesive will then be left to cure for a few seconds before moving on to the next lash.
  6. Finishing touches: After all of the extensions are applied, the technician will comb through the lashes to ensure that they’re separated and symmetrical. They may also apply a sealant or coating to protect the extensions and help them last longer.

How do eyelash extensions stay attached?

Eyelash extensions are attached to natural lashes using a special adhesive that’s formulated to be safe for use around the eyes. The adhesive is typically made from cyanoacrylate, a type of fast-drying and strong bonding agent.

When applied correctly, the adhesive forms a strong bond between the extension and the natural lash, which allows the extension to stay attached for several weeks. However, the bond is not permanent and will eventually break down over time, causing the extension to fall off along with the natural lash.

How long do eyelash extensions last?

Eyelash extensions typically last between two to six weeks, depending on several factors such as the natural lash growth cycle, the quality of the adhesive, and the client’s aftercare routine. As natural lashes shed and grow, the extensions will gradually fall off and need to be replaced with new ones.


Eyelash extensions are a popular way to enhance natural lashes and create a fuller, more dramatic look. They’re applied using a meticulous process that involves isolating individual natural lashes and attaching a single extension to each one using a special adhesive. When applied correctly, eyelash extensions can last for several weeks and add length, volume, and curl to natural lashes.