Short answer: one double eyelid and one single, or two creases at different heights, is one of the most common eyelid patterns we see. Tape can help, but the most frequent mistake is putting the same size in the same place on both eyes. Each eyelid has its own fold path, its own puffiness and its own habits, so each gets its own placement. In the language we use in assessments: there is a good eye, which is the reference, and a difficult eye, which is the one being trained.

Why eyelids end up uneven

• Different fold paths. Each lid has lines where the skin naturally wants to fold. On one eye that path may be strong and visible; on the other it may be faint, lower, or hidden under the skin above it.
• Sleep position. Sleeping on the same side every night puts more fluid and more pillow pressure on that eye. The morning puffiness is different, so the crease is different.
• Rubbing and habits. Rubbing one eye more, inserting a contact lens from one side, or habitually raising one brow all act on one lid more than the other.
• Micro-creases and skin-tension lines. Faint extra lines can split the fold so one eye settles on a lower or higher path than the other. These lines are common, and they are not permanently erased by any routine; the goal is a stronger preferred path, not a blank lid.

Two things are worth separating from cosmetic asymmetry. If one lid has recently started to droop, covers more of the eye than it used to, or affects your vision, see a doctor first. And if a crease is uneven after surgery, that is a question for the surgeon, not for tape.

Why the same tape in the same place does not work

If the fold paths sit at different heights and you tape both eyes at one height, the difficult eye is being asked to fold on a line it does not want. Typical results: the crease drifts, you get a double line or a triple fold, or it looks fine in the mirror at night and is gone by lunch. Meanwhile the good eye, which did not need help, may start to change too.

A step-by-step approach

1. Find each eye's fold path separately. Tabletop mirror below eye level, chin slightly up, brow lifted, eyes looking down so the lid skin is extended. With a clean rounded tool, trace the lid gently 10 to 20 times and watch where it wants to fold. Do this for each eye, including the good one, so you know what you are matching.
2. Match the good eye's crease type, not just its height. A crease can be crescent shaped, tapering toward the nose, or parallel to the lash line. A tall parallel crease on the difficult eye next to a small crescent on the good eye still looks uneven. Most of the time the target is the good eye's crease, and the smaller of the two possible creases.
3. Choose size and position for the difficult eye. The F-tape comes in one shape with trim lines: full size 4, trimmed at the middle line for size 3, trimmed at the last line for size 2. Lowering the tape and cutting it smaller are two different adjustments. If the crease sits too high, lower the tape, especially its tail, before you reach for scissors.
4. Leave the good eye alone at first. It is the reference. Raising it to meet a new, higher crease on the other side is sometimes possible later, but only after you have traced the good eye too and seen how it responds. Changing both eyes at once removes the one thing you can compare against.
5. Change one variable at a time. If one eye keeps drifting, adjust that eye's position only, give it one to two weeks, then reassess. Height, angle and trim changed together tell you nothing.
6. Photograph both eyes together every morning. Same light, same distance, relaxed face, before exercises. Compare weeks, not days.

The morning routine, for both eyes

Wear the F-tape and N-tape for about 8 to 9 hours overnight. In the morning remove the N-tape first, inner corner outward, release the skin from the F-tape, then remove the F-tape from its tail. Then Tracing-the-Line, 10 to 20 gentle passes along the chosen path, and Holding-the-Line for 2 to 3 minutes. If an Eyelid Advisor recommends it, the F-tape on the difficult eye can stay on alone for 30 minutes to 1 hour at most. The full procedure is on the instructions page.

What matching looks like in real cases

Cherry's case follows an uneven pair that daytime tape and glue could not hold. David's assessment shows how a difficult eye is read from an eyelid profile video. The guidance examples include a report for one single and one double eyelid, with each eye's placement marked on photos. A pattern repeats in all of them: formation came quickly, retention took consistency, and the good eye was used as the measuring stick.

If you are not sure where to place the tape

Uneven eyelids are exactly the case where a second pair of eyes helps most, because the right line for the difficult eye is often not the most visible one. Start with the Find Your Best Fit assessment; if your pattern fits, you can send an eyelid profile video and get placement marked for each eye. The tapes are here.

Sources

• Anson G, Kane MA, Lambros V. Sleep Wrinkles: Facial Aging and Facial Distortion During Sleep. Aesthetic Surgery Journal, 2016.
• Park DH, et al. Anthropometry of Asian Eyelids by Age. Plastic and Reconstructive Surgery, 2008.
• Optifold assessment reports, 2025 to 2026 (de-identified observations).

This article is general information, not medical advice. Results from any eyelid routine vary from person to person.