Ectropion

Involutional (Age-Related) Ectropion

• Horizontal lid laxity: Loss of elasticity in the canthal tendons and tarsus
• Lower lid retractor dehiscence: Attenuation or disinsertion of capsulopalpebral fascia
• Orbicularis oculi weakness: Reduced muscle tone with aging
• Most common type: Accounts for 85-90% of ectropion cases

Cicatricial (Scarring) Ectropion

• Trauma: Burns (chemical, thermal), lacerations, or surgical injuries
• Chronic inflammation: Severe chronic blepharitis, rosacea, atopic dermatitis
• Skin conditions: Ichthyosis, scleroderma, Stevens-Johnson syndrome
• Previous surgery: Overcorrection from blepharoplasty or other lid procedures
• Radiation therapy: Periocular radiation causing tissue contraction

Paralytic Ectropion

• Facial nerve palsy (CN VII): Bell's palsy, stroke, tumor compression
• Orbicularis oculi paralysis: Loss of muscle tone causing lid sagging
• Combined with lagophthalmos: Incomplete eyelid closure

Mechanical Ectropion

• Eyelid tumors: Basal cell carcinoma, squamous cell carcinoma, sebaceous gland carcinoma
• Eyelid edema: Severe allergic reactions, angioedema
• Large chalazion or cysts: Mass effect pulling lid margin outward

Congenital Ectropion

• Rare condition: Present at birth
• Blepharophimosis syndrome: Associated with other eyelid anomalies
• Down syndrome: Increased prevalence
• Tarsal kink syndrome: Congenital tarsal malformation

Involutional Ectropion Mechanism

1. Horizontal lid laxity development: Canthal tendon elongation and tarsal plate weakening with age
2. Retractor disinsertion: Capsulopalpebral fascia detachment from inferior tarsal border
3. Gravitational pull: Lax lower lid falls away from globe under gravity
4. Orbicularis override: Pretarsal orbicularis muscle overrides tarsal margin
5. Chronic epiphora initiates: Poor punctal position prevents tear drainage
6. Conjunctival metaplasia: Exposed palpebral conjunctiva keratinizes
7. Progressive worsening: Chronic inflammation and rubbing perpetuate eversion

Cicatricial Ectropion Mechanism

• Anterior lamella shortage: Skin and orbicularis muscle contracture
• Vertical scar traction: Fibrous tissue pulls lid margin downward and outward
• Loss of tissue elasticity: Scarring prevents normal lid conformity to globe

Paralytic Ectropion Mechanism

• Loss of orbicularis tone: Facial nerve palsy causes muscle denervation
• Gravitational sagging: Unopposed weight of lower lid pulls it downward
• Loss of blink mechanism: Absent muscle contraction prevents lid-globe apposition
• Combined lagophthalmos: Increased ocular surface exposure risk

Secondary Changes

• Conjunctival keratinization from chronic air exposure
• Punctal malposition preventing tear drainage
• Corneal exposure and desiccation
• Chronic inflammation perpetuating lid malposition

By Etiology

• Involutional (senile): Age-related lid laxity; most common (85-90%)
• Cicatricial: Secondary to scarring or skin shortage
• Paralytic: Facial nerve palsy with orbicularis weakness
• Mechanical: Tumor, edema, or mass effect
• Congenital: Present at birth; rare

By Anatomical Location

• Medial ectropion: Affects inner third of eyelid; often involves punctal eversion
• Central (mid-lid) ectropion: Middle segment involvement
• Lateral ectropion: Outer third; often associated with lateral canthal tendon laxity
• Total ectropion: Entire lower lid everted

By Severity

Demographic Factors

• Advanced age: Prevalence increases significantly after age 60
• Gender: Slightly more common in males (likely due to facial structure)
• Ethnicity: Caucasians have higher prevalence than Asians

Anatomical Factors

• Large or prominent eyes: Increased gravitational pull on lids
• Negative orbital vector: Eye more anterior than orbital rim
• Shallow orbit: Less support for periocular structures
• Lid laxity: Generalized connective tissue disorders

Medical Conditions

• Facial nerve disorders: Bell's palsy, stroke, tumor
• Chronic blepharitis: Long-standing lid margin inflammation
• Thyroid eye disease: Proptosis increasing lid tension
• Floppy eyelid syndrome: Rubbery, easily everted lids
• Obstructive sleep apnea: Associated with floppy eyelid syndrome
• Ichthyosis or eczema: Chronic skin conditions

Iatrogenic Factors

• Previous blepharoplasty: Overcorrection or excessive skin removal
• Periocular surgery: Trauma to canthal tendons or retractors
• Radiation therapy: Tissue fibrosis and contraction
• Chronic steroid use: Tissue thinning

Behavioral Factors

• Chronic eye rubbing: Mechanical trauma to lid structures
• Sleeping face down: Pressure on lids accelerating laxity
• Sun exposure: Photoaging and tissue degeneration

Eyelid Position Abnormalities

• Outward eversion of lid margin: Visible gap between lid and globe
• Exposed palpebral conjunctiva: Red/pink tissue visible below lid margin
• Punctal malposition: Lower punctum everted away from tear lake
• Sagging lower lid: Inferior displacement of entire lid
• Loss of lid-globe apposition: Lid does not conform to eye surface

Lid Laxity Tests

• Snap-back test positive: Lid does not return promptly to normal position after manual displacement
• Distraction test positive: >8mm lid distraction from globe
• Lateral canthal tendon laxity: Lateral canthus displaced medially
• Medial canthal tendon laxity: Punctum displaced laterally with lateral pull

Conjunctival and Ocular Surface Signs

• Conjunctival hyperemia: Redness and injection of exposed tissue
• Conjunctival keratinization: Thickened, whitish appearance in chronic cases
• Conjunctival hypertrophy: Thickening from chronic exposure
• Inferior punctate keratopathy: Corneal staining in exposure area
• Corneal dellen: Localized corneal thinning from desiccation

Tear Film Abnormalities

• Epiphora: Tear overflow onto cheek
• Tear meniscus enlargement: Increased tear lake volume
• Fluorescein dye retention: Poor tear drainage

Associated Findings

• Facial asymmetry: In paralytic ectropion
• Skin changes: Maceration, eczema, or dermatitis on cheek
• Eyelid masses: If mechanical ectropion
• Scarring: If cicatricial ectropion

Primary Symptoms

• Excessive tearing (epiphora): Most common complaint; constant wetness on cheek
• Foreign body sensation: Gritty or scratchy feeling
• Eye irritation: Burning, stinging, or discomfort
• Redness: Chronic conjunctival injection
• Mucoid discharge: String or crusting

Exposure-Related Symptoms

• Dryness: Paradoxical dry eye despite tearing
• Photophobia: Light sensitivity if corneal involvement
• Blurred vision: From irregular tear film or corneal changes
• Morning crusting: Worse upon awakening

Cosmetic Concerns

• Visible deformity: Awareness of abnormal lid position
• Aged appearance: Lower lid sagging
• Red, inflamed appearance: Exposed conjunctiva
• Social embarrassment: Visible tearing and discharge

Secondary Symptoms

• Cheek skin maceration: From chronic moisture exposure
• Recurrent conjunctivitis: Repeated infections
• Pain: If corneal ulceration develops

Ocular Surface Complications

• Exposure keratopathy: Corneal epithelial breakdown from desiccation
• Corneal ulceration: Infectious or sterile ulcers
• Corneal scarring: Permanent vision loss
• Corneal perforation: Rare but vision-threatening
• Persistent epithelial defects: Non-healing corneal erosions

Conjunctival Complications

• Chronic conjunctivitis: Persistent inflammation
• Conjunctival keratinization: Metaplasia from chronic exposure
• Conjunctival hypertrophy: Thickening and scarring
• Symblepharon: Adhesion between bulbar and palpebral conjunctiva (rare)

Tear Drainage Complications

• Chronic epiphora: Persistent tearing affecting quality of life
• Punctal stenosis: Narrowing from chronic inflammation
• Canaliculitis: Infection of lacrimal drainage system
• Dacryocystitis: Lacrimal sac infection from stasis

Skin and Adnexa Complications

• Cheek dermatitis: Eczema or maceration from moisture
• Secondary infection: Bacterial or fungal skin infections
• Eyelid margin keratinization: Thickening and irregularity

Surgical Complications

• Recurrence: Return of ectropion after surgery
• Overcorrection: Entropion from excessive tightening
• Lid retraction: Vertical shortening causing scleral show
• Canthal deformity: Abnormal canthal angle
• Scarring: Visible or hypertrophic scars
• Wound dehiscence: Suture breakdown

Functional and Psychosocial Impact

• Visual impairment: From corneal scarring or irregular astigmatism
• Quality of life reduction: Chronic symptoms affecting daily activities
• Social withdrawal: Embarrassment from appearance
• Depression or anxiety: Psychological impact of chronic condition

Neurological Associations

• Facial nerve palsy: Bell's palsy, stroke, tumor compression
• Cerebrovascular accidents: Stroke affecting facial nerve nucleus or pathway
• Skull base tumors: Acoustic neuroma, meningioma
• Multiple sclerosis: Can present with facial weakness

Connective Tissue Disorders

• Ehlers-Danlos syndrome: Generalized tissue laxity
• Marfan syndrome: Connective tissue abnormalities
• Cutis laxa: Skin elasticity defects

Dermatological Conditions

• Ichthyosis: Skin contracture causing cicatricial ectropion
• Scleroderma: Skin tightening and fibrosis
• Stevens-Johnson syndrome: Severe mucocutaneous reaction
• Toxic epidermal necrolysis: Life-threatening skin condition
• Atopic dermatitis: Chronic eczema affecting periocular skin

Chromosomal and Genetic Syndromes

• Down syndrome (Trisomy 21): Increased prevalence of ectropion
• Blepharophimosis syndrome: Multiple eyelid anomalies

Sleep Disorders

• Obstructive sleep apnea: Associated with floppy eyelid syndrome
• Obesity: Risk factor for both sleep apnea and lid laxity

Thyroid Disease

• Graves' ophthalmopathy: Proptosis increasing lid tension
• Thyroid eye disease: Lid retraction and secondary laxity

No Direct Systemic Complications

Ectropion itself does not cause systemic health problems. However, it may be a manifestation of underlying systemic disease that requires evaluation and management.

Clinical Diagnosis

Diagnosis is primarily clinical, based on characteristic examination findings:

• Visible lid eversion: Outward turning of lid margin
• Exposed palpebral conjunctiva: Red tissue visible below normal lid margin
• Punctal malposition: Lower punctum displaced away from tear lake
• Poor lid-globe apposition: Gap between lid and eye surface

Patient History

• Age and onset of symptoms
• Chief complaint: tearing, irritation, redness, cosmetic concern
• Previous facial trauma or surgery
• History of facial nerve palsy
• Skin conditions or burns
• Systemic diseases (connective tissue disorders, thyroid disease)
• Previous treatments attempted

Physical Examination

Etiology Classification

Determine the underlying cause to guide treatment:

• Involutional: Horizontal lid laxity with age-related changes
• Cicatricial: Visible scarring or anterior lamella shortage
• Paralytic: Facial asymmetry, inability to close eye
• Mechanical: Associated mass or edema
• Congenital: Present from infancy

Ancillary Testing

• Photography: Document lid position and severity for monitoring and surgical planning
• Imaging (CT/MRI): If tumor or orbital pathology suspected
• Neurological evaluation: For paralytic ectropion to identify cause
• Schirmer test: Assess for concurrent dry eye

Diagnostic Criteria

Conservative (Non-Surgical) Management

Temporary measures for mild cases or when surgery is contraindicated:

Surgical Management

Definitive treatment for most cases. Choice of procedure depends on etiology and anatomical findings.

Surgical Considerations

• Anesthesia: Local with sedation for most procedures; general for extensive reconstruction
• Bilateral surgery: Often performed if both eyes affected
• Combined procedures: May address multiple anatomical issues simultaneously
• Recovery time: 2-4 weeks for most procedures

Postoperative Care

• Ice compresses: First 48 hours to reduce swelling
• Head elevation: Sleep with head elevated for 1 week
• Topical antibiotic ointment: To incision site 2-3 times daily
• Lubricating drops: Continue for ocular surface protection
• Activity restriction: Avoid heavy lifting, bending, straining for 2 weeks
• Suture removal: 5-7 days postoperatively (if non-absorbable)
• Follow-up: 1 week, 1 month, 3 months to assess outcome

Management Algorithm

Natural History

• Progressive condition: Involutional ectropion typically worsens over time without treatment
• Rarely self-resolves: Unlike some pediatric conditions, adult ectropion does not spontaneously improve
• Complications increase with duration: Longer duration increases risk of corneal damage
• Paralytic ectropion may improve: If facial nerve function recovers (Bell's palsy)

Surgical Outcomes

• High success rate: 85-95% with appropriate surgical technique
• Symptom resolution: Most patients report significant improvement in tearing and irritation
• Cosmetic improvement: Excellent aesthetic outcomes in majority
• Corneal healing: Exposure keratopathy typically resolves within weeks postoperatively
• Recurrence rate: 5-15% depending on etiology and surgical technique

Factors Affecting Prognosis

Long-Term Outcomes

• Durable correction: Most patients maintain good lid position long-term
• Quality of life improvement: Significant reduction in symptoms and cosmetic concerns
• Visual outcomes: Excellent if treated before corneal scarring
• Revision surgery: May be needed in 5-15% of cases
• Aging changes: Continued facial aging may cause recurrence after many years

Vision Prognosis

• Uncomplicated cases: Excellent visual prognosis with timely treatment
• Corneal exposure without scarring: Full recovery expected
• Central corneal scarring: May result in permanent visual impairment
• Corneal perforation: Guarded prognosis; may require penetrating keratoplasty

Overall Prognosis

1. Entropion

2. Lid Retraction

• Definition: Abnormal superior displacement of lower lid or inferior displacement of upper lid
• Difference from ectropion: Lid margin still apposed to globe but malpositioned vertically
• Common cause: Thyroid eye disease
• Key feature: Scleral show but no lid eversion

3. Lagophthalmos

• Definition: Incomplete eyelid closure
• Relationship: Can coexist with ectropion (especially paralytic)
• Difference: Lagophthalmos is inability to close; ectropion is lid malposition
• Assessment: Observe lid closure during gentle and forced lid closure

4. Floppy Eyelid Syndrome

• Definition: Extremely lax, rubbery eyelids that easily evert
• Relationship: Predisposes to ectropion but distinct entity
• Key features: Upper lid involvement, association with sleep apnea, chronic papillary conjunctivitis
• Management: Treat sleep apnea, lubrication, sometimes surgery

5. Eyelid Coloboma

• Definition: Congenital or acquired full-thickness eyelid defect
• Difference: Actual absence of lid tissue vs. malposition in ectropion
• Appearance: Notch or gap in eyelid
• Management: Surgical reconstruction required

6. Chemosis (Conjunctival Edema)

• Definition: Swelling of bulbar conjunctiva
• Appearance: May create appearance of exposed conjunctiva
• Difference: Conjunctiva is swollen and protruding beyond lid margin, which remains in normal position
• Common causes: Allergy, infection, thyroid eye disease

7. Dermatochalasis

• Definition: Excess, redundant eyelid skin
• Difference: Skin hangs over lid margin but lid position normal
• Can coexist: May occur simultaneously with ectropion
• Management: Blepharoplasty if symptomatic

Diagnostic Key Points