What is the difference between single eyelids and hidden double eyelids?
A double eyelid crease is formed when the levator muscle has fibrous attachments to the upper eyelid skin; when opening the eyes, the muscle pulls the skin inward to create a fold. In single eyelids (monolids), these attachments are either absent or very weak, leaving the upper eyelid skin flat. In hidden double eyelids, a crease exists but sits too low or is concealed by overlying excess skin and fat when the eyes are open, making the fold visible only when closing the eyes or looking down. Many single eyelids are also accompanied by thick eyelid fat, making the lids appear heavy and the eyes look smaller than they actually are.
Why is it important to distinguish between them before choosing a procedure?
Non-incisional blepharoplasty (suture method) creates a crease by anchoring the skin to the levator muscle through several sutures without removing excess skin or fat. Therefore, for hidden double eyelids caused by excess skin and thick fat, suture blepharoplasty often yields an indistinct crease or gradually loosens over time because the skin continues to weigh down on the fold. Conversely, performing full incisional blepharoplasty on young patients with thin skin and minimal fat is a more invasive intervention than necessary.
What determines a natural, long-lasting eyelid crease?
The amount of excess skin, upper eyelid fat thickness, levator muscle strength, the distance from the lash line to the brow, and bilateral symmetry. The doctor also checks for mild ptosis (drooping eyelids)—if present, creating a crease without correcting the levator muscle will make the eyes look droopier and more tired.
Realistic expectations
The goal is to achieve an eyelid crease that suits your eye shape and facial features, maintains bilateral symmetry, and allows for lighter, easier eye opening—not an unnaturally wide crease like a photo model's. Creases formed by non-incisional blepharoplasty may gradually fade over the years in individuals with thick eyelid fat. Creases created through incisional blepharoplasty are more permanent, but they leave a scar concealed within the crease and require a longer recovery period.
How does BonBoz approach single and hidden double eyelids?
A plastic surgery specialist will consult with you directly: measuring excess skin, assessing fat volume through palpation, evaluating levator muscle function, and simulating the crease position with a specialized probe so you can preview the result. Based on these findings, the doctor will recommend either non-incisional blepharoplasty (for minimal excess skin and fat) or partial/full incisional blepharoplasty (for excess skin, thick fat, or hooded lids). The consulting doctor is the one who performs the surgery; incision lines, recovery timelines, and potential risks are thoroughly explained in advance.
