Eye drops that lift a droopy eyelid: what they can and cannot do

Can an eye drop really lift a droopy eyelid? Partly. A drop exists, it is a prescription medicine, and it does lift the lid a little for a few hours. It is not a way of avoiding an examination, and it does not treat the reason the lid dropped. Here is what the evidence supports, and where it stops.

Can an eye drop really lift a droopy eyelid?

Yes, by a small amount and only while the drop is working. The drop is oxymetazoline 0.1%, a medicine that stimulates alpha-adrenergic receptors, the same kind of receptor on the surface of a small muscle called Müller's muscle. That muscle sits just behind the main lifting muscle of the upper lid, the levator, and it helps to hold the lid up when it is stimulated. The drop makes it contract harder. The US prescribing information for the product describes it as indicated for the treatment of acquired blepharoptosis in adults, one drop into one or both affected eyes once daily.

Blepharoptosis is the medical name for ptosis, a droopy upper eyelid. Acquired means it was not there from birth. I have no source on whether or how any such drop is registered or supplied in Malaysia, so I will not say. What I can say is what the studies found when the drop was used.

How much lift does it give?

Less than most advertisements suggest. A systematic review published in The Laryngoscope pooled five studies with 458 patients. The lid margin rose by an average of 1.40 mm after treatment, measured as MRD1, the distance from the centre of the light reflex on the pupil to the edge of the upper lid. Compared with people using placebo drops, the extra rise was 0.83 mm, and the confidence interval ran from 0.10 to 1.55 mm. In plain words, the drop beat placebo by somewhat under a millimetre on average, and the true figure could be very small or a little above a millimetre and a half. The authors also reported high heterogeneity, which means the studies differed a good deal from each other, and I would treat the pooled figure as an estimate and not a promise.

A separate 6-month trial in Japan enrolled 336 patients. Measured two hours after the drop, the lid margin was 0.59 mm higher than with placebo at day 14 on the once-daily dose. The authors report the improvement was maintained beyond 8 hours after a dose. That is a useful pattern to know: the lift is a daily arrangement, and it is a subtle one. A person whose lid covers the pupil will not be transformed by 0.6 mm.

Who does it suit, and who should not use it?

It suits an adult whose lid has dropped a little, for whom an examination has found a plain acquired ptosis with no congenital, neurological or mechanical cause, and who wants a temporary lift for particular days. That is the group the trials targeted. The Japanese trial excluded people with congenital ptosis, Horner syndrome, myasthenia gravis and ptosis caused by a mechanical problem in the lid. Those exclusions are the map of where the evidence stops.

The label lists cautions worth reading before an appointment. It advises care in people with cerebral or coronary insufficiency, or Sjögren's syndrome, and warns that alpha-adrenergic agonists may affect blood pressure. It may raise the risk of angle-closure glaucoma in people with untreated narrow-angle glaucoma. Contact lenses should be taken out before the drop and can go back 15 minutes later. The most common side effects, in 1 to 5% of people, were surface damage to the front of the eye called punctate keratitis, redness, dry eye, blurred vision, stinging on instillation, irritation and headache. In the Japanese trial, mild events predominated.

Anyone with high blood pressure, heart disease, glaucoma or a dry eye should tell their doctor before trying any such drop, and none of this should be started from an advertisement.

What can the drops not do?

They cannot change the structure that caused the droop. In the most common age-related kind, the levator's tendon has stretched or come away from the firm plate of the lid, the tarsus. No drop repairs a stretched tendon. I explain the mechanisms in why some eyelid ptosis is not ageing at all.

They also do nothing for the extra skin that hangs over a lid that is in the right place. That is dermatochalasis, loose eyelid skin, and it is a different problem from ptosis, though the two can coexist and look alike. A drooping eyebrow can press on the lid and mimic ptosis too, which I describe in droopy eyelid or droopy brow. A drop aimed at the wrong one of these three will simply not help, and the injections, fillers and devices in non-surgical eyelid rejuvenation act on skin and soft tissue, so they do not lift a stretched levator either.

One more limit deserves mention. A temporary droop after anti-wrinkle injections is a separate situation, and I write about what helps and what to wait for in droopy eyelid after botulinum toxin injections. It should not be assumed that a drop suited to one is right for the other.

Can a drop that lifts the lid hide a serious cause?

It can, which is why the diagnosis has to come first. A lid that lifts with a drop has not told you why it dropped. A droop that is worse in the evening and better after rest can point to myasthenia gravis, a condition in which the connection between nerve and muscle tires. A droop with a larger pupil, double vision or a new headache can point to a nerve problem that needs same-day attention, and I describe those signs in third nerve palsy and other neurological causes.

The picture is more complicated than it looks. A published report of two patients with myasthenia found that daily oxymetazoline improved their fatigable droop, in one within 30 minutes and lasting six to eight hours. The authors themselves say larger studies are needed and that the drop did nothing for the double vision. That is interesting, but it makes my point rather than undoing it: the drop can improve a lid whose cause is serious, so an improved lid is not the same as a normal one.

When is surgery the real answer?

When the ptosis is true, meaning the lid position is low because of the levator or its tendon, and it is bothering you or blocking your vision. Surgery treats that structure. A posterior approach called Müller muscle-conjunctival resection avoids a cut in the skin and suits, in the classic description, mild-to-moderate ptosis with good levator function. A recent review notes that the phenylephrine test long used to pick candidates has limits, since it did not significantly change the result of surgery in the cases it examined, and that external levator advancement is preferred when the levator itself needs to be seen and adjusted or the crease needs to be changed. Which one, if any, suits a given lid is a decision made at examination, on measurements.

Ptosis surgery has its own risks and recovery, which I cover in what ptosis surgery actually fixes. Whether a person chooses a drop for particular occasions or a lasting repair, the first step is the same. Have the lid measured and the cause named, once, by an eye doctor. Droopy lids are one of several ways eyes come to look tired, and I put them in context in what actually makes eyes look tired. The other lid problems I write about are gathered under eyelid conditions.