Functional blepharoplasty: performed on medical grounds to correct vision or discomfort

What functional blepharoplasty is

Functional blepharoplasty is upper eyelid surgery whose aim is to remove the excess skin or fat that interferes with vision, either because it falls across the line of the pupil or because it creates a constant weight that makes it hard to open the eye fully. It is also carried out to relieve associated discomforts such as irritation, watering, muscle tension or headaches from overuse of the forehead muscle.

It differs from a purely aesthetic blepharoplasty in that the indication starts from a medical diagnosis. In many cases the operation may be covered by medical insurance or public health systems, provided the functional impairment is documented with objective tests.

The most frequent medical indications

Functional blepharoplasty is indicated in patients with symptoms arising from excess tissue in the upper eyelid. The most usual causes are:

• Dermatochalasis: redundant excess skin falling over the mobile part of the eyelid.
• Pseudoptosis: drooping of the eyelid from excess skin, with no muscle weakness.
• Obstruction of the upper or lateral field of vision.
• Visual fatigue at the end of the day, particularly when reading or driving.
• Tension headaches from overusing the forehead muscle to compensate for the drooping eyelid.
• Eye irritation from the fold of skin constantly rubbing the surface of the eye.
• Infection or dermatitis in the fold of skin from a build-up of sweat or sebum.
• Asymmetry of the eyelids with a functional effect.

In every case the diagnosis has to be confirmed with a clinical examination and further tests, such as visual field testing or comparative clinical photography at rest and on raising the brow.

Clinical assessment before surgery

Before a functional blepharoplasty is scheduled, the patient has to be assessed as a whole. The medical consultation includes:

• A detailed medical history and any eye conditions.
• Assessment of the position of the brows and of the eyelid crease.
• Examination of the levator muscle of the eyelid.
• Measurement of the visual field, particularly the upper field.
• Testing the function of the forehead muscle.
• Assessment of the laxity of the skin and the muscle tone of the eyelid.
• Standardised photographic records for objective assessment.

In some cases an ophthalmic report and computerised visual field testing are requested to document the restriction of the visual field. That study demonstrates objectively that the excess skin is compromising functional vision, particularly in the upper field.

The decision to operate should not rest on aesthetic criteria alone. Functional surgery has a therapeutic purpose and has to be planned on the basis of clinical and documentary parameters.

Where the threshold lies between functional and aesthetic

This is the question that decides whether a blepharoplasty is a medical operation or an aesthetic procedure, and it is not answered by eye. The American Academy of Ophthalmology reviewed the available evidence and set the indicators that predict that surgery really will improve visual function:

• A margin-to-reflex distance of 2 mm or less — that is, the distance between the light reflex on the cornea and the edge of the upper eyelid.
• A loss of upper visual field of at least 12 degrees or 24%.
• A demonstrable functional limitation in everyday activities, such as reading.

Where those criteria are met, the review concludes that correction produces significant improvement in vision, in peripheral vision and in quality of life. They are also the thresholds insurers and public systems use in treating it as a medical indication rather than as cosmetic surgery.

One qualification is worth adding, in case anyone has been told they “just miss it”. A prospective study of 46 eyelids compared the visual field measured before surgery with the actual result obtained afterwards, and found that the pre-operative test underestimated the benefit by 35% on average: in 76% of cases the result was better than the test had predicted. Put another way, perimetry is useful for deciding, but it tends to fall short in predicting how much will be gained.

The surgical technique

Functional blepharoplasty of the upper eyelid is usually carried out under local anaesthetic with light sedation, as a day case. The surgical procedure includes the following steps:

• Precise marking of the excess skin with the patient sitting up.
• Local anaesthetic to the upper eyelid region.
• An incision in the natural crease of the eyelid, symmetrically on both sides.
• Removal of the excess skin, muscle and, where necessary, orbital fat.
• Closure with a fine intradermal suture, removed between the fifth and seventh day.

In some cases the blepharoplasty is combined with other complementary techniques, such as correcting eyelid ptosis (where there is weakness of the levator muscle) or raising the brows by minimally invasive techniques, such as a direct or a temporal lift.

The surgical aim is not only to clear the line of sight but to restore the function of the eyelid and keep a natural expression. The work is therefore done precisely, avoiding over-correction or artificial results.

The benefits of functional blepharoplasty

When well indicated and properly carried out, this surgery offers both functional and aesthetic benefits. Among them:

• Recovery of the upper field of vision.
• Less of that feeling of heaviness in the eyes.
• Improvement in visual fatigue at the end of the day.
• Fewer tension headaches from muscle overactivity.
• Relief of eye irritation from constant rubbing.
• A wider opening of the eyelid and a lighter facial expression.
• An improved quality of life in activities such as reading, driving or using screens.

As well as the medical benefit, the aesthetic result is usually notable, even though it is not the main aim of the operation. The eyes regain their vitality and the face gains harmony without losing its natural look.

Recovery after surgery

Recovery after a functional blepharoplasty is generally well tolerated. Full recovery is reached within 10 to 15 days, although the initial swelling can last a few days longer. The advice includes:

• Applying cold locally in the first 48 hours to reduce the swelling.
• Sleeping with the head slightly raised.
• Avoiding physical exertion, sun exposure and contact with water in the area until the stitches come out.
• Not wearing make-up until the wound has closed (5-7 days).
• Following the medical instructions on eye drops, ointments or painkillers where these are prescribed.

Clinical reviews are carried out in the first week and thereafter according to progress. Follow-up allows any asymmetry, irregularity in healing or need for further treatment to be picked up.

Possible complications

Like any operation, functional blepharoplasty can carry risks. The least common complications, and usually mild ones, include:

• Local bruising or prolonged swelling.
• Superficial infection of the surgical wound.
• A hypertrophic or asymmetrical scar.
• A temporary change in how the eye closes (very rare if the safety margin is respected).
• Temporary dry eye.

The complication rate is low when surgery is carried out by an experienced team and on clear clinical indications. At the Instituto de Cirugía Plástica del Mediterráneo, strict protocols of surgical safety and postoperative follow-up are applied to ensure things progress properly.

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Functional blepharoplasty is an operation with a great impact on the quality of life of patients with visual limitations or physical discomfort arising from excess skin on the eyelids. Far from being purely cosmetic surgery, its aim is to restore how the eye works, improve everyday comfort and relieve symptoms that directly affect vision and general wellbeing.

At the Instituto de Cirugía Plástica del Mediterráneo this surgery is approached from a rigorous medical perspective, with individual diagnoses, precise planning and safe surgical execution. If you have visual discomfort related to your upper eyelids, or suspect that excess skin may be affecting your vision, request a medical consultation. We will assess your case professionally and offer you the most suitable solution for restoring the function of your eyes.