What functional eyelid surgery means
Functional eyelid surgery is the half of this specialty concerned with how the eyelids work rather than how they look. The eyelids are not decoration. They spread the tear film with every blink, protect the surface of the eye, and pump tears towards the drainage system. When an eyelid sits too low, turns inwards, turns outwards or fails to close, the consequences are a sore red eye, constant watering, blurred vision, or in the worst cases damage to the cornea itself. These are medical problems with surgical solutions, and most of them are fixed by short day case operations under local anaesthetic.
The problems people put up with for too long
A great many patients arrive having tolerated something for years, usually because they were told it was just part of getting older. An eyelid that turns in and scratches the eye is not something to live with, and the operation that corrects it takes half an hour. A drooping lid that has narrowed your field of vision can be lifted. An eye that waters constantly in the wind, to the point of interfering with driving or reading, almost always has an identifiable cause. If a symptom is affecting what you can do, it is worth having assessed properly rather than assumed to be inevitable.
Getting the diagnosis right first
The commonest reason functional eyelid surgery fails is that the wrong operation was chosen. A watering eye can come from a blocked drainage system, from an eyelid that is not sitting against the eye, from an unstable tear film, or from the surface being irritated into overproducing tears, and the treatments for those four are entirely different. A drooping upper lid can be true ptosis, or excess skin, or a descended brow, or a combination. I would rather spend the first appointment measuring and examining carefully than operate on an assumption. Where the picture is genuinely unclear, saying so is more useful than a confident guess.
NHS and private pathways
Most functional eyelid surgery is available on the NHS, and I am a substantive NHS consultant at Queen Alexandra Hospital as well as seeing private patients. Which route makes sense depends on your symptoms, your commissioning area and how long you are prepared to wait. I will give you the same clinical opinion either way, and I will tell you plainly if I think something can wait or does not need operating on at all.