Updated: Jul 14, 2009
Lower lid ectropion is a very common condition in older persons. Frequency increases steadily with age. Defined as an eversion of the eyelid away from the globe, the condition is classified according to its anatomic features as involutional, cicatricial, tarsal, congenital, or neurogenic/paralytic. Surgical approaches are directed toward the underlying etiologic factors.
Ectropion is an outward turning of the eyelid margin. It occurs most often in the lower eyelid. The condition may be mild or severe and may involve all or part of the eyelid margin.
Ectropion is a very common condition in older persons. It is more frequently found in men than in women, which may be related to men generally having larger tarsal plates than women.
Ectropion is most commonly observed as an involutional change associated with horizontal laxity of the involved eyelid. Ectropion may be classified into the following 5 types, ordered in decreasing frequency: involutional (senile), paralytic (neurogenic), cicatricial, mechanical, and congenital.1
Involutional ectropion
Involutional ectropion is the most common form of ectropion. A major factor is horizontal lid laxity, which is usually due to age-related (most patients are older persons) weakness of the canthal ligaments and pretarsal orbicularis.
For many years, physicians have questioned why some patients develop ectropion and others develop entropion, when both conditions seem to share the same etiologic factors. Bashour and Harvey recently answered this question.2 They report the following:
Paralytic ectropion
Paralytic ectropion may occur with seventh nerve palsy from diverse causes such as Bell palsy, cerebellopontine angle tumors, herpes zoster oticus, and infiltrations or tumors of the parotid gland.
Cicatricial ectropion
Cicatricial ectropion occurs from scarring of the anterior lamella by conditions such as facial burns, trauma, chronic dermatitis, or excessive skin excision (or laser) with blepharoplasty. Ectropion is not uncommon after orbital fracture repair with a transcutaneous approach. Less common causes of cicatricial ectropion include cutaneous T-cell lymphoma.
Mechanical ectropion
Mechanical ectropion may occur with lid tumors, such as neurofibromas, that evert the lower lid.
Congenital ectropion
Congenital ectropion is rare and usually involves the lower lid. The cause is often a vertical deficiency of the anterior lamella. Although congenital ectropion is rarely an isolated anomaly, it may be associated with blepharophimosis syndrome, microphthalmos, buphthalmos, orbital cysts, Down syndrome, and ichthyosis (collodion baby). Occasionally, cases of congenital ectropion are paralytic.
Causal factors leading to ectropion include horizontal laxity of the eyelid (universal), dehiscence of the lower eyelid retractors, vertical shortening of the anterior lamella of the eyelid, paralysis of the orbicularis oculi muscle causing loss of eyelid muscular tone, and neoplasia within the lower eyelid pulling or forcing the eyelid away from the globe.
Patients usually present because of epiphora, ocular irritation, or cosmesis.
Generally, the progression observed is from eyelid laxity to punctal ectropion, to medial ectropion, and then to generalized ectropion. If the punctum is everted slightly from the lacus lacrimalis, tears cannot effectively drain into the canalicular system. Also, horizontal eyelid laxity may produce a flaccid canalicular syndrome or poor lacrimal pump so that tears are not siphoned from the lacus lacrimalis, producing epiphora.
This tearing malfunction is aggravated by the chronic ectropion and eyelid retraction that produce lagophthalmos and secondary exposure keratopathy. With time, the exposed conjunctiva thickens and keratinizes, producing further ocular irritation.
Tearing (epiphora) is probably the most common indication for surgical correction, but ocular irritation and cosmesis are also frequently encountered and may be indications for surgery.
The orbicularis oculi muscle is the sphincter of the eyelids. It spreads over the eyelids and out onto the forehead, temple, and cheeks. It is divided into orbital and palpebral portions, with the palpebral portion subdivided into preseptal and pretarsal parts.
The pretarsal part is attached laterally to the Whitnall tubercle by the lateral canthal tendon. This tendon (which is actually just a band of connective tissue) is weak in ectropion. Medially, the pretarsal orbicularis forms the anterior crus of the medial canthal tendon that inserts into the frontal process of the maxillary bone. The posterior pretarsal orbicularis inserts into the posterior lacrimal crest. The small strip of pretarsal muscle at the lid margin forms the gray line and is called the Riolan muscle. Images 1-2 demonstrate these relationships through horizontal and sagittal sectioning of the orbit.
Surgery to correct ectropion is contraindicated in patients who are unable to tolerate the procedure.
Provide medical therapy if surgical therapy is not warranted or not possible.
The correct surgical treatment of ectropion depends on the etiology. Horizontal lid laxity is often observed with ectropion and can usually be corrected with a lateral tarsal strip procedure. Mild-to-moderate cases of medial ectropion may respond to a medial conjunctival spindle procedure. However, tarsal ectropion requires reinsertion of the lower lid retractors, and an augmentation of the anterior lamellae (along with excision of any cicatrix) is required for cicatricial ectropion.
The author recommends the use of a corneal protector during oculoplastic procedures. The surgeon must be wary of the remote possibility of flash burns whenever oxygen is on the surgical field. Failure to use a corneal protector may transform an elective lid repair into a much more complicated problem.
Ensuring patient comfort during surgery is important. Since most cases of ectropion involve the lower lid, supplemental infraorbital nerve block is a useful adjunct to direct injection and subconjunctival injection.
Tarsorrhaphy
This procedure can be performed as a temporary fix for corneal exposure; however, the author believes better surgical alternatives are usually available.
Electrocautery
Electrocautery at the junction of conjunctiva and lower margin of the tarsus is not commonly advocated, as this procedure is usually only a temporary measure.
Suture repair
Double-armed chromic sutures are passed through the inferior border of the tarsus, emerging at the skin surface near the orbital rim. The author does not advocate this temporary method of repair.
Congenital ectropion
Ensure corneal lubrication. If the condition does not resolve after a few days, consider placing lid margin sutures. A lateral tarsorrhaphy may be required if suture techniques do not work; however, be careful to avoid iatrogenic amblyopia. More severe cases of congenital ectropion may require a skin flap or graft.
Ichthyosis is a well-described cause of congenital ectropion, and although it is sometimes managed conservatively with lubrication, skin grafts may be required.3
Lateral tarsal strip
Horizontal lid laxity is a component of most ectropion cases, especially involutional ectropion. Numerous methods for correcting horizontal lid laxity exist. Older methods include wedge resections and the Kuhnt-Szymanowski procedure. Whenever feasible, however, the author prefers a lateral canthal-tightening procedure. Surgery at the lateral canthus avoids the possibility of lid notching with noncanthal procedures and decreases the risk of trichiasis.
The most common variation of lateral canthal-tightening is the lateral tarsal strip procedure, as follows:
It is not uncommon for patients to experience prolonged discomfort at the lateral canthus following the lateral tarsal strip procedure.
Kuhnt-Szymanowski (Smith modification)
When marked inferior dermatochalasis accompanies ectropion and the lateral canthal tendon is not dehisced, an inferior subciliary blepharoplasty skin incision can be combined with a pentagonal wedge excision of the orbicularis and posterior lamellae.
Precise closure is required to prevent a lid notch.
Tarsal ectropion
This complete eversion of the lower lid occurs when disinsertion of the capsulopalpebral fascia from the inferior tarsal border is present.
In addition to horizontal lid tightening, reinsert the retractors (ideally from a conjunctival approach). A spindle of redundant conjunctiva, no more than 3 mm in vertical height, can be excised if necessary.
A double-armed 5-0 chromic suture can be used to reattach the capsulopalpebral fascia to the inferior tarsus in a running fashion.
Medial ectropion
If tearing is the primary problem in patients with punctal ectropion, a one-snip or two-snip inferior punctoplasty may be beneficial. Easily performed with Vannas scissors and topical anesthetic, punctoplasty restores continuity between the lacus lacrimali and the medial canthal angle.
For mild-to-moderate medial ectropion, a medial conjunctival spindle procedure (excision of the medial conjunctiva and retractors) can be performed.
Byron Smith lazy-T procedure
This well-described procedure for repairing prominent medial ectropion combines a lower lid full-thickness pentagonal wedge resection, 3-4 mm temporal to the punctum, with resection of a medial triangle of conjunctiva and lower lid retractors (similar to medial conjunctival spindle).
Paralytic ectropion
A tarsal strip procedure is often helpful. At least 5 mm of the lateral lower lid may require excision. With lower lid ectropion, suborbicularis oculi fat (SOOF) lifts are also an option.
In patients with extreme paralytic ectropion, a fascia lata (or Gore-Tex) sling or temporalis transfer procedure may be required. An upper lid gold weight implantation is a helpful adjunct for patients with lagophthalmos. Usually, a 1.0- to 1.2-g weight is implanted superior to the tarsus and inferior to the orbicularis. Extrusion of the gold weight occasionally occurs with time as well. Since the gold weight uses gravity, patients should sleep with the head slightly elevated. The gold weights are not a contraindication to MRI investigation.
Cicatricial ectropion
An enhanced tarsal strip (ie, a tarsal strip without the traditional lateral skin excision) may help correct some degree of cicatricial ectropion. If an enhanced tarsal strip is insufficient, Z-plasties, V- to Y-plasty, skin grafts, or advancement flaps may be used to lengthen the anterior lamella.
Skin grafts may be obtained from the upper lid, if dermatochalasis is present; preauricular or postauricular skin is another alternative. Thin and buttonhole the skin graft (for drainage). Place a compressive bolster over the graft to enhance graft survival and to decrease hematoma formation. The bolster is left for 5 days. A superior traction suture decreases the risk of recurrent cicatrix postoperatively.
Xu et al recently described a surgical technique for lower eyelid cicatricial ectropion repair using a bipedicle orbicularis oculi muscle or myocutaneous flap from the upper eyelid.4 A strip of orbicularis oculi muscle or a myocutaneous flap from the upper eyelid with 2 pedicles attached in the medial and lateral canthus is advanced to the lower eyelid to suspend the eyelid and repair the skin defect.
For the lid sutures, the author prefers an antibiotic steroid combination, such as Maxitrol (neomycin, polymyxin, bacitracin), 3 times a day.
Applying cold compresses to the eyelids every 15 minutes (as tolerated) while the patient is awake decreases bruising and swelling. Frozen peas in a plastic bag are a useful alternative to traditional cloth compresses.
The author generally does not prescribe narcotics postoperatively. Ask the patient to use acetaminophen 325-650 mg by mouth every 4 hours as needed. Ask the patient to avoid aspirin-containing products if possible.
Patients are usually reviewed on the first postoperative day. Patients then return 5-7 days later for suture removal.
Complications are primarily related to corneal and conjunctival exposure. Complications can involve conjunctival keratinization, corneal breakdown, epiphora, and pain. Surgical complications may include bleeding, hematoma, infection, wound dehiscence, pain, and poor positioning of the tarsal strip.
Outcome and prognosis are usually excellent.
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lower lid ectropion, lower lid laxity, eyelid eversion, involutional, cicatricial, tarsal, congenital, neurogenic, paralytic, lower eyelid reconstruction, eyelid laxity
Mounir Bashour, MD, CM, FRCS(C), PhD, FACS, Assistant Professor of Ophthalmology, McGill University; Clinical Assistant Professor of Ophthalmology, Sherbrooke University; Medical Director, Cornea Laser and Lasik MD
Mounir Bashour, MD, CM, FRCS(C), PhD, FACS is a member of the following medical societies: American Academy of Ophthalmology, American Association for Pediatric Ophthalmology and Strabismus, American College of International Physicians, American College of Surgeons, American Medical Association, American Society of Cataract and Refractive Surgery, American Society of Mechanical Engineers, American Society of Ophthalmic Plastic and Reconstructive Surgery, Biomedical Engineering Society, Canadian Medical Association, Canadian Ophthalmological Society, Contact Lens Association of Ophthalmologists, International College of Surgeons US Section, Ontario Medical Association, Quebec Medical Association, and Royal College of Physicians and Surgeons of Canada
Disclosure: Nothing to disclose.
Richard V Smith, MD, Director of Clinical Affairs, Associate Professor, Department of Otolaryngology, Division of Head and Neck Surgery, Einstein College of Medicine, Montefiore Medical Center
Richard V Smith, MD is a member of the following medical societies: American Academy of Otolaryngology-Head and Neck Surgery, American College of Surgeons, American Head and Neck Society, American Laryngological Rhinological and Otological Society, American Medical Association, American Medical Student Association/Foundation, Medical Society of the District of Columbia, New York Academy of Medicine, and Vermont State Medical Society
Disclosure: Nothing to disclose.
Francisco Talavera, PharmD, PhD, Senior Pharmacy Editor, eMedicine
Disclosure: eMedicine Salary Employment
David W Stepnick, MD, Associate Professor, Departments of Plastic Surgery and Otolaryngology-Head and Neck Surgery, Case Western Reserve University School of Medicine, University Hospitals of Cleveland Case Medical Center
David W Stepnick, MD is a member of the following medical societies: American Academy of Facial Plastic and Reconstructive Surgery, American Academy of Otolaryngology-Head and Neck Surgery, American College of Surgeons, American Medical Association, American Society for Head and Neck Surgery, and Society of University Otolaryngologists-Head and Neck Surgeons
Disclosure: Nothing to disclose.
Christopher L Slack, MD, Otolaryngology-Facial Plastic Surgery, Private Practice, Associated Coastal ENT; Medical Director, Treasure Coast Sleep Disorders
Christopher L Slack, MD is a member of the following medical societies: Alpha Omega Alpha, American Academy of Facial Plastic and Reconstructive Surgery, American Academy of Otolaryngology-Head and Neck Surgery, and American Medical Association
Disclosure: Nothing to disclose.
Arlen D Meyers, MD, MBA, Professor, Department of Otolaryngology-Head and Neck Surgery, University of Colorado School of Medicine
Arlen D Meyers, MD, MBA is a member of the following medical societies: American Academy of Facial Plastic and Reconstructive Surgery, American Academy of Otolaryngology-Head and Neck Surgery, and American Head and Neck Society
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