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Drooping eyelids, also known as blepharoptosis or ptosis, can be caused by weak levator muscles, which are the muscles responsible for lifting the eyelid. This condition can result in a tired appearance and even cause vision problems. While it is often associated with old age, it can also be congenital or caused by other factors such as excess skin around the eyelid. To correct this issue, surgical procedures like the levator advancement or the levator imbrication technique are commonly performed to tighten and reposition the levator muscle tendon, improving both the appearance and function of the eyelid.
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What You'll Learn
Surgical techniques for fixing the levator muscle
Levator Ani Muscle
The levator ani muscle is located in the pelvic floor and can be injured during childbirth. Repairing this muscle is challenging due to its location and the delicate nature of the surrounding tissues. One technique for repairing levator ani muscle injuries is vaginal surgery using a mesh patch for reinforcement. This technique has been successful in treating prolapse caused by avulsion of the puborectalis muscle. However, some patients have reported symptoms of recurrent prolapse, pain, and other complications.
Levator Avulsion
Direct surgical repair of levator avulsion is feasible at the time of prolapse surgery. However, it may not effectively prevent prolapse recurrence, suggesting that there is often microscopic trauma and functional muscle impairment in addition to the avulsion.
Eyelid Ptosis
Eyelid ptosis, or blepharoptosis, is a common eyelid disorder that can be corrected with surgery. Surgical techniques for eyelid ptosis generally fall into three categories: frontalis suspension techniques, external/transcutaneous repair of the levator complex, or internal/transconjunctival repair of the Müller's muscle, tarsus, conjunctiva, or levator complex. The choice of technique depends on the severity of the ptosis, with external approaches preferred for more severe cases and internal approaches demonstrating better cosmetic outcomes and lower revision rates.
Minimally Invasive Levator Advancement (MILA) is a surgical technique that causes limited disruption to the anatomy while maintaining good aesthetic outcomes and long-term stability. This procedure is not suitable for cases with absent or very poor levator function, where frontalis suspension is preferred.
To protect the Müller's muscle and minimize injury, a levator imbrication technique can be used for patients with mild to moderate congenital ptosis. This technique has been shown to shorten operation time, reduce damage, and provide stable postoperative outcomes without long-term complications.
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Ptosis treatment
To treat mild and moderate congenital ptosis, the traditional surgical technique involves dissecting the Müller’s muscle and the levator palpebrae superioris. However, a less invasive procedure, known as the levator imbrication technique, can also be used to correct this condition with less damage and stable postoperative outcomes.
Minimally Invasive Levator Advancement (MILA) is another surgical procedure that can be used to treat eyelid ptosis. This technique causes limited disruption to the anatomy while maintaining good height, contour, lid folds, function, and long-term stability. MILA is not suitable for cases with absent or very poor levator function, where frontalis suspension is the preferred procedure.
Before performing surgery, a thorough history and evaluation are necessary. The patient should be educated about the procedure, and the brow and its frontalis muscle should be relaxed and held in a neutral position to evaluate the lid position and function accurately.
During surgery, local anaesthesia is administered, and intravenous dexamethasone and tranexamic acid may be used to minimise swelling and bleeding. The surgical procedure involves carefully lifting the deep surface of the levator aponeurosis off the Muller muscle and placing levator advancement sutures.
After surgery, patients may experience side effects such as blurry vision, swelling, redness, and soreness, which typically dissipate within several weeks.
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Levator advancement sutures
The surgery involves making an incision through the skin and orbicularis muscle along the eyelid crease. The levator muscle and Muller's muscle are then carefully dissected from the upper border of the tarsal plate and conjunctiva until Whitnall's ligament is identified. The desired amount of resection is measured, and the levator advancement is performed by passing a suture through the levator and tarsus. The suture is then tied firmly, and the skin is closed with additional sutures.
In some cases, a minimally invasive levator advancement (MILA) procedure may be performed, which involves smaller incisions and a more targeted approach to the levator muscle. This technique can be advantageous for ill patients or those requiring touch-up blepharoplasties or isolated medial or lateral ptosis repair.
The number of sutures used in the procedure can vary, with some surgeons using two-point or three-point suturing techniques. The choice of technique depends on various factors, including the severity of ptosis, the anatomy of the patient's eyelid, and the surgeon's preference.
To minimise the risk of complications, such as hematomas, intravenous dexamethasone and tranexamic acid are administered at the start of the procedure to reduce swelling and bleeding. Additionally, the surgeon must carefully avoid blood vessels during suture placement and prophylactically cauterise the vascular arcade above the tarsus.
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Preoperative assessment
The levator ani muscle (LAM) plays a vital role in pelvic floor support, and its dysfunction can lead to pelvic organ prolapse (POP). Preoperative assessment is essential to determine the best surgical approach for repairing levator muscle dysfunction and preventing POP recurrence. Here is a detailed overview of the preoperative assessment process:
Medical History and Ophthalmological Evaluation:
A thorough understanding of the patient's medical history is necessary. This includes evaluating the patient's symptoms, such as worsening ptosis with fatigue and alcohol consumption, as well as any associated issues like chronic brow elevation, rhytids, headaches, or neck pain. Ophthalmological expertise is crucial for assessing challenging cases and determining the need for surgical repair, especially in congenital ptosis in paediatric patients.
Physical Examination:
The brow and its frontalis muscle should be relaxed and held in a neutral position during the examination. The level of the upper eyelid margins in relation to the pupillary margin is assessed. This can be done with the patient sitting upright and following the examiner's finger with their gaze. The lid margin pupillary distance and light reflex are evaluated, and Bell's phenomenon is assessed. Any asymmetry in pupillary reaction to light warrants further investigation.
Imaging Techniques:
Pelvic Floor Ultrasound:
Three-dimensional (3D) pelvic floor ultrasound is a valuable tool for preoperative assessment. It helps diagnose and evaluate pelvic organ prolapse, levator ani muscle deficiency (LAD), and minimal levator hiatus (MLH). The ultrasound images can be acquired in various positions, such as transperineal, endovaginal, and endoanal views, providing detailed information about the pelvic floor muscles.
MRI:
Pelvic floor MRI assessment of the levator ani muscle (LAM) can be incorporated into the preoperative evaluation to identify patients at higher risk for POP recurrence, allowing for optimised patient management and care.
Phenylephrine Testing:
Phenylephrine testing is commonly used in the preoperative assessment of ptosis. However, there is variation in its interpretation, and a negative test does not necessarily predict a poor surgical outcome.
Surgical Planning:
The preoperative assessment guides the surgeon in choosing the most appropriate surgical technique. The main options are frontalis suspension techniques, external/transcutaneous repair of the levator complex, or internal/transconjunctival repair of the Müller's muscle, tarsus, conjunctiva, or levator complex. The degree of upper lid elevation required, brow elevation, and eye dominance are also considered in the surgical planning.
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Minimally invasive levator advancement
The levator muscle, responsible for keeping the eyelid lifted, can become weak or stretched over time, leading to droopy eyelids and even vision issues. Ptosis treatment can address this by shortening and repositioning the tendon to allow the eyelid to lift to a natural position.
The MILA technique involves making a smaller incision than the standard technique, preserving the orbital septum. The advancement of the levator determines the crease rather than the position of the incision. The procedure can be performed in less than 3 minutes under optimal conditions, and the anatomy is preserved, making subsequent surgeries much easier.
To perform the procedure, the patient looks down, and the lid is elevated off the globe. The needle is then passed through 50% of the depth of the tarsus, parallel to the upper lid margin. The needle should be passed through the levator, superficial to and not including the Muller muscle. A firm horizontal bite of the tarsus is taken, approximately 2 mm below its upper edge. The suture is then passed under the levator aponeurosis again to pierce the levator approximately 2 mm medial to its entrance point.
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Frequently asked questions
The levator muscle is the muscle in the eyelid that can become weak or stretched over time, causing drooping eyelids.
Depending on the severity of the issue, you may need to undergo surgery to fix your levator muscle. There are a variety of surgical techniques available, including Minimally Invasive Levator Advancement (MILA), which is a reliable method to correct blepharoptosis.
After surgery, patients may experience blurry vision, swelling, redness, and soreness. These side effects typically dissipate within several weeks as the body heals.
Yes, in some cases, non-surgical treatments may be recommended. For example, intravenous dexamethasone and tranexamic acid can be used to minimize swelling and bleeding.
To prevent issues with your levator muscle, it is important to be aware of the factors that can contribute to the problem. For example, the risk of developing a levator muscle issue increases with age. Additionally, fat or excess skin around the eyelid can cause the muscle to weaken. Maintaining a healthy weight and practicing proper eye care may help reduce the risk of developing issues with your levator muscle.
