Floppy Eyelid Syndrome

What Is Floppy Eyelid Syndrome

Floppy eyelid syndrome (FES) is a condition in which the upper eyelids become abnormally soft, rubbery, and lax — so lax that they evert (turn inside-out) with only the gentlest pull, and often flip open on their own during sleep. The exposed inner lining of the eyelid rubs against the pillow night after night, producing a chronic, stubborn irritation of the eye that is frequently mistaken for ordinary conjunctivitis or dry eye.

Causes & Associations

The eyelid tarsus in FES shows a loss of elastin, leaving the lid floppy and easily deformed. Two mechanisms then drive the symptoms: spontaneous eyelid eversion during sleep, and repetitive mechanical rubbing of the everted lid against bedding.

• Obstructive sleep apnea — present in a large proportion of patients; the single most important systemic association
• Obesity and male sex (classically middle-aged men, though it occurs in women and slimmer patients too)
• Side-sleeping — symptoms are often worse, or only present, on the side the patient sleeps on
• Keratoconus and other corneal ectasias occur with increased frequency

Symptoms & Signs

Patients typically describe a red, irritated, watery eye that is worst on waking and never fully settles despite repeated drops. The signs at the slit lamp are characteristic once they are looked for.

• Chronic redness, foreign-body sensation, and mucoid discharge — often one-sided
• Easy eversion of the upper lid with minimal traction — the key diagnostic sign
• A soft, rubbery upper tarsus and poor lid–globe congruity
• Lash ptosis — the upper lashes point downward
• Papillary conjunctivitis of the upper palpebral conjunctiva; punctate corneal staining
• Frequently associated eyelid ptosis from stretching of the levator attachment

Diagnosis

FES is a clinical diagnosis that hinges on a high index of suspicion. Any patient with a chronic, one-sided, treatment-resistant red eye — especially an overweight, middle-aged man — should have the upper lid tested for easy eversion. Because of the strong link with sleep apnea, a key part of the work-up is screening for OSA and referral for a sleep study when indicated.

Treatment

Treatment has two goals: protect the eye at night, and address the underlying laxity and any systemic sleep apnea.

Conservative measures

• Lubricating ointment at night and during the day to protect the ocular surface
• A night shield, eye patch, or taping the lids closed to physically prevent eversion against the pillow
• Treating obstructive sleep apnea (for example with CPAP) — often improves the eye symptoms and is important for the patient’s general health

Surgical correction

When symptoms persist, the definitive treatment is horizontal eyelid tightening — a full-thickness eyelid-shortening or lateral tarsal-strip procedure that restores normal lid tension so the lid no longer everts. Associated ptosis or lash ptosis can be addressed at the same time. Results are durable once the laxity is corrected.