Eyelashes stop growing because their growth phase is naturally short.
Here's a more detailed explanation:
The Eyelash Growth Cycle
Like the hair on your head, eyelashes go through a growth cycle consisting of three phases:
- Anagen Phase (Growth Phase): This is when the eyelash actively grows. However, the anagen phase for eyelashes is much shorter than for scalp hair. This shorter phase is what limits the length that eyelashes can reach.
- Catagen Phase (Transitional Phase): During this phase, the eyelash stops growing and the hair follicle shrinks.
- Telogen Phase (Resting Phase): The eyelash rests before eventually falling out, allowing a new eyelash to grow in its place.
Why Eyelashes Stop at a Certain Length
The key factor in why eyelashes stop growing at a certain length is the duration of the anagen phase. According to the provided reference, the anagen phase for eyelashes is significantly shorter than the anagen phase for head hair. This means that:
Eyelash hairs stop growing at a certain length before they enter their transitional phase. The eyelash has reached its natural length and stops growing.
To summarize, the growth phase of eyelashes is programmed to be short, causing them to reach their full length and stop growing before entering their resting phase.
Practical Insights
- Eyelash Length Varies: Eyelash length can vary slightly from person to person due to genetic factors and individual differences in the duration of the anagen phase.
- No Need to Trim: Trimming your eyelashes won't make them grow longer, as the length is predetermined by the hair follicle's growth cycle.
- Eyelash Growth Serums: Some eyelash growth serums may claim to lengthen the anagen phase, however, there may be associated side effects and they do not change the natural maximum length significantly. Consult a professional before using these serums.
- Eyelash Extensions: If you want longer lashes, consider getting eyelash extensions. However, these are applied onto existing eyelashes and have to be cared for carefully.
