In short. Acquired ptosis is a drooping upper lid that develops in adult life. The commonest cause is a stretched or detached tendon, which is stable and surgical, but a droop can also come from a nerve, a muscle, the junction between them, an inflammation or a mass, and those need a physician first.
Key points
- Most acquired ptosis comes from a stretched or detached tendon and is a stable surgical problem.
- A droop can also come from a nerve, a muscle, their junction, inflammation or a mass.
- None of the medical causes is treated with an operation on the tendon.
- Operating on an active cause gives a result that does not last and can hide the diagnosis.
- Sudden droop with double vision, a changed pupil or weakness elsewhere is urgent.
The tendon is the commonest cause, not the only one
In adult life the commonest cause of a drooping lid is the tendon that connects the lifting muscle to the lid, which stretches or comes away from the lid as the years pass. It is common, it is stable, and it is a surgical problem. It is not the only cause, and the others are the reason an assessment begins with questions rather than with a plan.
Which causes need a physician first?
A droop can come from the nerve that supplies the lifting muscle, from the muscle itself, from the junction between nerve and muscle, from something pressing on the lid from behind, or from inflammation. Each of these behaves differently and each is looked for in a particular way. A droop that appears suddenly may follow a problem in the blood supply to the nerve. A droop with a pupil that is different on that side, or with double vision, or with a lid that is not the only thing affected, is a different problem again. An inflammation or a mass in the lid can also produce a droop.
The pattern through the day points to the muscle
A droop that varies through the day, worse in the evening and better after rest, points towards the muscle rather than the tendon. None of these causes is treated with an operation on the tendon. Raising the lid of a patient whose droop is caused by an active muscle or nerve condition produces a result that does not last, and it can obscure the very sign that would have led to the right diagnosis. The medical question is settled first, and the surgical question is asked afterwards if anything remains.
Which changes make a droop urgent?
A droop that appears suddenly, especially with double vision, a changed pupil or pain, needs urgent assessment. So does a droop with difficulty swallowing, slurred speech, or weakness in the arms, legs or face. A droop that varies through the day, or that comes with fatigue or breathlessness, is also assessed rather than watched at home.
| Feature | What it suggests | What it means for surgery | What happens next |
|---|---|---|---|
| Stable, symmetrical over time, painless, no other symptoms | The ordinary tendon kind | A surgical problem | Assessment and a surgical plan |
| Sudden onset, especially with double vision, a changed pupil or pain | May follow a problem in the blood supply to the nerve | An operation on the tendon is not the answer | Medical assessment first |
| Worse in the evening and better after rest | The muscle tires rather than the tendon stretching | An operation on the tendon is not the answer | Neurological assessment |
| A pupil different on that side, double vision, or other parts affected | A different problem again | An operation on the tendon is not the answer | Medical assessment first |
| Inflammation or a mass in the lid | Another cause of a droop | An operation on the tendon is not the answer | Medical assessment first |
| Difficulty swallowing, slurred speech, weakness in the arms, legs or face | An urgent picture | Not a surgical question | Urgent care |
How is the droop assessed before any operation?
A focused examination covers whether the droop is one side or both, what it does through the day, whether it changes with fatigue, whether there is double vision, whether the pupils are equal, whether the eye moves normally in every direction, and whether there is weakness anywhere else in the body. Blood tests and imaging are ordered where the answers point that way. This is ordinary clinical work rather than a rare investigation, done because the alternative, operating first and discovering the cause afterwards, is worse for the patient.
Why an ordinary-looking droop is still investigated
Most drooping lids in adults are the ordinary tendon kind, and most assessments end with a surgical plan. The small number that are not is why the questions are asked of everyone rather than of the patients who look unusual. A droop that is stable, symmetrical over time, painless, and unaccompanied by any other symptom is reassuring, but it is reassuring because it was asked about, not because it was assumed.
Sources
- American Society of Plastic Surgeons: procedure and safety guidance on ptosis repair
- National Institute for Health and Care Excellence: guidance relevant to ptosis and eyelid surgery
- Cochrane Library: systematic reviews on ptosis surgery
Source links open each organisation's search results for the topic. Document-level confirmation is pending the reviewer's sign-off.
Internal links
Frequently asked questions
How can I tell whether my droop is the ordinary kind?
The ordinary kind is stable, usually symmetrical over time, and worse on neither side in particular. The features that point elsewhere are a droop that is new, that is one-sided, that varies through the day, that comes with double vision or a change in the pupil, or that is accompanied by weakness anywhere else. Any of those is assessed medically first.
What does a droop that is worse in the evening suggest?
It suggests that the muscle itself tires rather than that the tendon has stretched. That pattern is one of the things a neurological assessment looks for. It is also the reason a surgeon will ask what time of day the lid is at its worst rather than only how it looks in the clinic.
If the cause is medical, is surgery ever appropriate later?
Sometimes. Once the underlying condition is diagnosed and treated, a residual droop may remain, and that can be considered on its own merits later. The order matters: the medical question is settled first, because operating on a droop whose cause is still active produces a result that does not hold.
Risks & Limitations
- The lid can be left sitting higher or lower than intended. Both are recognised outcomes of an operation that adjusts position, and a further operation to set the height is part of this surgery rather than a failure of it.
- An eye that does not close fully, or that feels dry, gritty or watery, is the complication watched for most closely here. It is more likely in a lid that was already dry, which is why the tear film is examined before anything is planned.
- The two lids are rarely symmetrical before surgery and can remain uneven after it. Where one lid is repaired, the other may change position on its own, which is why both sides are sometimes planned together.
- Blurred vision in the first days is usually the ointment and the swelling rather than the eye. A change in vision that persists, or double vision, is assessed rather than waited out.
- Bruising, swelling, a gritty feeling and a lid that sits higher than expected in the first weeks are the normal course rather than complications, and settle over weeks to months.
- A scar in the lid crease, or above it after a suspension operation, matures over months and does not disappear.
- No operation in this area can promise a particular lid height, and the final height is judged in months rather than weeks.
When to Seek Care
- Sudden drooping of one or both lids, especially with double vision, difficulty swallowing, slurred speech or weakness elsewhere: seek emergency care immediately rather than an appointment.
- Severe eye pain, sudden loss of vision, or an eye that becomes rapidly swollen and tense after an operation.
- A lid that is not closing at all, or an eye that is exposed and painful when you try to sleep.
- Bleeding from the wound that does not stop with gentle pressure, or a wound that opens.
- Fever with spreading redness, warmth or discharge around the eye.
- Dryness, a gritty feeling or watering that is getting worse rather than settling.
References & Further Reading
- American Society of Plastic Surgeons (ASPS) — procedure and safety guidance
- National Institute for Health and Care Excellence (NICE, UK) — relevant guidance
- Cochrane Library — systematic reviews
- Chinese Medical Association Plastic Surgery Branch — clinical guidance
This page is patient education, not medical advice, and it does not cite individual studies. Discuss your own case with a qualified clinician. To arrange an assessment at Chongqing West District Hospital, see Contact & Consultation.