Ophthalmology – Eyelid Conditions
Chalazion
Chalazion is a chronic inflammatory granulomatous cyst of the eyelid, resulting from obstruction and retention of the lipid content of a Meibomius gland - one of the specialized sebaceous glands aligned in the palpebral tarsus. Unlike styes, with which it is frequently confused by patients, chalazion is an aseptic lesion: it is not a bacterial infection, but a granulomatous foreign-body inflammatory reaction triggered by the release of glandular lipids into the surrounding palpebral tissue, following obstruction of the gland's excretory duct. Clinically, it appears as a firm, rounded, painless or only slightly painful nodule, located in the thickness of the eyelid - most often the upper eyelid - mobile under the skin, without adherence to the cutaneous plane and without significant redness in the chronic phase. Chalazion is one of the most common palpebral disorders, affecting all age groups but peaking in adults between the ages of 30 and 50, and occurring more frequently in people with chronic blepharitis, acne rosacea or seborrheic dermatitis, conditions that favor hypersecretion and thickening of palpebral sebum. In the majority of cases, chalazion is a benign condition that resolves spontaneously in a few weeks to months with appropriate local care; persistent or recurrent cases may require intralesional corticosteroid injection or surgical incision-curettage. Particular attention should be paid to recurrent chalazions at the same site in patients over 40 years of age, for whom a biopsy is recommended to exclude sebaceous carcinoma of the eyelid, a rare tumor that can mimic a benign chalazion.
Anatomy of the Meibomian Glands and Formation Mechanism
Understanding the structure and function of the Meibomian glands is essential for grasping why a chalazion forms and how to prevent it:
- The meibomian glands are modified sebaceous glands, organized in vertical rows within the tarsus—the rigid cartilaginous plate that gives each eyelid its shape; there are approximately 25 to 40 in the upper eyelid and 20 to 30 in the lower eyelid, with their excretory orifices opening in a line on the free border of the eyelid, just behind the row of eyelashes.
- They secrete a complex lipid mixture (meibum) that forms the outer lipid layer of the tear film, the most superficial layer of the protective film covering the cornea; this lipid layer slows the evaporation of the tear film and prevents dry eye syndrome.
- When the excretory opening of a meibomian gland becomes blocked – due to thickening of meibum, hyperkeratinization of the excretory duct, or local inflammation – the sebum accumulates within the gland's body and eventually ruptures the glandular wall, releasing lipids into the surrounding tarsal stroma.
- Macrophages and other local immune cells phagocytose these extracellular lipids but fail to digest them completely; a foreign body granulomatous reaction of the lipogranuloma type forms, gradually encapsulated by fibrous tissue, constituting the characteristic palpable nodule of a chalazion.
- Unlike an internal hordeolum, which is an acute suppurative infection of a Meibomian gland by Staphylococcus aureus, true chalazion is a sterile, chronic inflammatory process; the two entities may occur one after the other, and an untreated stye may evolve into a residual chalazion.
Risk factors and predisposing conditions
Certain medical conditions and lifestyle habits increase the risk of developing chalazia, which often recur:
| Risk factor | Facilitating mechanism |
|---|---|
| Chronic blepharitis | Chronic inflammation of the free edge of the eyelid, most often of staphylococcal origin or associated with meibomian gland dysfunction (MGD); promotes obstruction of the excretory ducts by scale deposits and bacterial biofilms; most frequent cause of recurrent chalazia. |
| Acne rosacea | Chronic skin condition affecting the face and frequently associated with meibomian gland dysfunction; meibum is thicker and more viscous, making it easier to obstruct the excretory ducts; recurrent chalazia are a classic ophthalmological manifestation of rosacea. |
| Seborrheic dermatitis | Sebaceous gland hyperplasia of the cutaneous and palpebral glands, leading to obstruction of the meibomian glands; often associated with squamous blepharitis. |
| Severe dry eye syndrome | Dry eye disease due to lipid deficiency (meibomian gland dysfunction) perpetuates a vicious cycle of eyelid inflammation and gland obstruction. |
| Wearing contact lenses | Contact lenses, especially when worn for extended periods, disrupt the tear film dynamics and can contribute to chronic eyelid inflammation and meibomian gland dysfunction. |
| Eye make-up | Applying makeup to the free edge of the eyelid (inner eyeliner, mascara) can obstruct the orifices of the meibomian glands and promote their dysfunction, especially when makeup removal is incomplete. |
| Immunodepression | Immunocompromised patients (HIV, immunosuppressive treatments) have an increased risk of multiple and recurrent chalazia, sometimes large, linked to an altered local inflammatory response. |
| Hypothyroidism | Changes in lipid metabolism associated with hypothyroidism can alter meibum composition and promote glandular obstruction; a clinical association documented in several series of recurrent chalazia. |
Symptoms and clinical presentation
Chalazia have a characteristic two-phase clinical evolution: an initial inflammatory phase and a chronic cystic phase, with distinct manifestations:
- Initial phase (internal stye or acute chalazion): appearance of redness, diffuse eyelid swelling, and pain or tenderness upon palpation of the eyelid margin; this phase generally lasts 1 to 3 days and can be clinically difficult to distinguish from a developing infectious stye.
- Chronic phase (formed chalazion): progressive appearance of a firm, well-defined, rounded or oval nodule located within the thickness of the eyelid; redness and pain subside; the nodule is mobile under the skin, not adherent to the surface skin layer, and usually measures 2 to 8 mm in diameter.
- Preferential localization in the upper eyelid (approximately 60-70 % of cases) due to the greater number of meibomian glands; may affect the lower eyelid; simultaneous or bilateral multiple chalazia are possible, especially in the presence of underlying chronic blepharitis.
- Viewed from the inner (conjunctival) surface of the everted eyelid, the chalazion appears as a raised yellowish or grayish area through the thin, translucent tarsal conjunctiva, reflecting the lipid content of the granuloma.
- Possible visual disturbance due to corneal compression if the chalazion is large (transient astigmatism induced by mechanical deformation of the cornea); slightly blurred or distorted vision in the affected eye that normalizes after the chalazion resolves
- Possible mechanical ptosis (drooping of the upper eyelid) due to large chalazia compressing the levator palpebrae superioris muscle.
- Variable spontaneous evolution: complete spontaneous resolution without treatment in about 25 to 50 % of cases in 2 to 6 months; residual encapsulated cyst persisting for months to years in other cases; spontaneous fistulization through the conjunctiva or skin with discharge of lipid content in a minority of cases
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Chalazion and stye (hordeolum) are two distinct eyelid conditions that are often confused. An external stye is an acute infection of an eyelash hair follicle or a Zeis gland by Staphylococcus aureus, Internal stye is a painful boil at the free edge of the eyelid, with a pustule visible at the base of the lash. Internal stye is a suppurative infection of a meibomian gland, more painful and deeper. Chalazion is a chronic lesion, painless in its constitutive phase, with no infectious aspect. The distinction is clinically important, as treatment differs: stye may require local or oral antibiotic therapy, while antibiotics are of no use in aseptic chalazion.
Differential diagnosis
Several eyelid conditions can mimic a chalazion and must be distinguished, especially to avoid misdiagnosing a malignant tumor:
| Affection | Distinguishing features |
|---|---|
| Stye (external or internal hordeolum) | Intense pain, diffuse redness of the eyelid, local warmth, visible pustule in case of an external stye; acute onset over a few days; response to warm compresses and topical antibiotics |
| Sebaceous carcinoma of the eyelid | Rare but serious malignant tumor, developing from the cells of the meibomian glands or Zeis glands; mimicking a recurrent chalazion in the same location, sometimes with localized eyelash loss (madarosis), an atypical appearance, or diffuse tarsal infiltration; biopsy essential for any recurrent chalazion in patients over 40 to 50 years of age or with an atypical appearance |
| Palpebral basal cell carcinoma or squamous cell carcinoma | Ulcerated lesion with pearly or indurated borders, often on the lower eyelid, in elderly patients with fair skin and chronic sun exposure; no cystic appearance; biopsy for diagnosis. |
| Epidermoid cyst | Superficial subcutaneous cyst containing keratin, adherent to the skin, mobile on the deep plane; characteristic whitish content sometimes visible through translucency; cutaneous and non-intratarsal localization |
| Xanthelasma | Yellowish, flat lipid deposits in the peri-orbital eyelid dermis, with well-defined borders, non-cystic, often bilateral and symmetrical; sometimes associated with hypercholesterolemia; no intra-tarsal cystic component |
| Capillary hemangioma or vascular malformation | Reddish-purple lesion, compressible, sometimes pulsatile; blanches with pressure; clinically different from a firm, non-vascular chalazion |
Treatment options
The treatment of a chalazion is adapted to the age of the lesion, its size, its impact on vision, and the patient's history. It follows a progression through therapeutic stages:
| Treatment | Practical arrangements | Indications and Efficacy |
|---|---|---|
| Warm compresses and eyelid massage | Application of a clean compress soaked in hot water (40 to 45 °C) on the closed eyelid for 5 to 10 minutes, 3 to 4 times a day; followed by gentle massage of the eyelid margin towards the gland openings to promote the evacuation of glandular content. | First-line treatment for any acute or recent chalazion; heat softens thickened meibum and promotes reopening of the blocked excretory duct; effective in 25% to 50% % of cases if started early; should be continued for at least 4 to 6 weeks before considering another option |
| Eyelid hygiene | Daily cleaning of the free edge of the eyelid with a cotton swab soaked in diluted baby shampoo, specific eyelid wipes (Blephaclean, Blephagel), or sterile compresses; removal of scales and debris from the free edge. | Indispensable in cases of associated blepharitis to treat the predisposing cause and prevent recurrences; efficacy demonstrated in reducing the frequency of recurrent chalazia associated with chronic blepharitis. |
| Antibiotic-corticosteroid eye drops or ointment | Combination of a topical antibiotic (tobramycin, chloramphenicol) and a corticosteroid (dexamethasone) as eye drops or ophthalmic ointment, applied 2 to 4 times per day for 1 to 2 weeks | Support treatment during the acute inflammatory phase to reduce edema and local inflammation; the antibiotic aims to prevent secondary superinfection; limited efficacy on chronic encysted chalazion; medical prescription required |
| Intralesional triamcinolone injection | Injection of a long-acting corticosteroid (triamcinolone acetonide 10 to 40 mg/mL) directly into the chalazion using a fine needle, after local anesthesia; performed by a physician or ophthalmologist during a consultation. | Resolution rate of 80-85% % after one or two injections; treatment of choice for persistent chalazia after 4 to 6 weeks of warm compresses, large chalazia, and chalazia in patients at high surgical risk; relative contraindication in individuals with dark skin due to the risk of local depigmentation; can be repeated once if there is incomplete resolution |
| Incision and surgical curettage | Procedure performed under local anesthesia by a physician or ophthalmologist; eyelid eversion, vertical incision of the inner (conjunctival) surface of the chalazion with a scalpel or scissors, curettage of the granulomatous and lipid content of the cystic cavity; no sutures required with conjunctival approach | Standard treatment for large, encysted chalazia that do not respond to warm compresses or corticosteroid injections; efficacy near 100%%; recurrence possible if the cyst wall is not completely excised; systematic biopsy of the cystic wall recommended for recurrent chalazia in the same location to exclude sebaceous carcinoma |
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It is strongly advised against attempting to express or puncture a chalazion at home. This maneuver risks causing a secondary bacterial superinfection, eyelid cellulitis, an unsightly scar, or damage to the conjunctiva. In case of spontaneous fistula formation of the chalazion, the lipid contents usually drain from the inner conjunctival surface of the eyelid without serious complications, but a medical consultation remains recommended to assess healing and adjust treatment.
Child support
Chalazia are common in children and have some particularities compared to adults that warrant specific attention:
- Chalazia in children are often larger than in adults and can induce temporary astigmatism due to mechanical corneal compression. This can impact the development of binocular vision and favor amblyopia («lazy eye») if they persist for several months during the visual acquisition period (before age 7). Ophthalmological follow-up is recommended for any large chalazion in a child under 7 years old.
- Warm compresses remain the first-line treatment for children, but their application requires the child's cooperation and adult supervision to prevent burns; lukewarm compresses are preferable to very hot compresses for young children.
- Intralesional corticosteroid injection is feasible in children but often requires light sedation or brief general anesthesia depending on age and cooperation, which often leads to surgical excision under outpatient general anesthesia for persistent and large chalazia in children under 5 to 6 years old.
- Relapses are frequent in children due to the difficulty in maintaining rigorous eyelid hygiene and the tendency to rub their eyes; educating parents and children on regular eyelid hygiene is essential to reduce relapses.
Eyelid hygiene and prevention
The prevention of chalazia relies mainly on the regular maintenance of eyelid and meibomian gland health:
- Practicing daily eyelid hygiene — gentle cleaning of the free edge of the eyelid with a suitable product (eyelid wipes, saline solution) — is particularly essential for people suffering from chronic blepharitis or rosacea acne.
- Apply preventive warm compresses (2 to 5 minutes daily) to closed eyelids in predisposed individuals to maintain meibum fluidity and gland opening permeability.
- Thoroughly remove eye makeup each night before bed, paying attention to the free eyelid edge and the base of the lashes, and avoid applying makeup to the inner eyelid (waterline) which directly obstructs the orifices of the meibomian glands.
- Avoid rubbing your eyes, a gesture that can deposit skin bacteria into the glandular orifices and promote blockage.
- Actively and long-term treat chronic blepharitis or underlying acne rosacea, which are the main causes of recurrent chalazia; oral tetracyclines (doxycycline 100 mg/day) long-term may be prescribed for ocular rosacea.
- In cases of dry eye syndrome associated with meibomian gland dysfunction, lipid tear substitutes (liposome-based artificial tears), omega-3 supplements, and in-office intense pulsed light (IPL) devices can improve meibomian gland function and reduce recurrences.
Signs requiring prompt medical attention
Seek immediate medical attention for rapid and painful swelling of the eyelid that spreads beyond the lid margin to the cheek or orbit, accompanied by fever, diffuse redness of the eye and surrounding tissues, and/or limited eye movement. These signs suggest orbital or periorbital cellulitis, a serious infectious complication requiring urgent antibiotic therapy and possibly hospitalization. A recurrent chalazion in the same location in a patient over 40 years old, or associated with localized loss of eyelashes or an atypical appearance (ulceration, induration), must be evaluated by an ophthalmologist for biopsy to rule out sebaceous cell carcinoma or other eyelid cancers.
For a persistent or recurring chalazion, or for any eyelid lesion of uncertain nature, a consultation at Clinique Omicron allows for a structured medical evaluation and referral to an ophthalmologist if necessary, at one of our service points in Quebec or via telemedicine. To make an appointment, visit cliniqueomicron.ca.
Consult at Clinique Omicron
Clinique Omicron handles the assessment and treatment of common eyelid conditions, including chalazia, at its various service points in Quebec and via telemedicine. A physician or a nurse practitioner (NP) can confirm the diagnosis, distinguish a chalazion from a stye or other eyelid lesion, initiate appropriate treatment, and refer to an ophthalmologist for persistent, large, or atypical lesions requiring corticosteroid injection or surgical intervention. To book an appointment, visit cliniqueomicron.ca.
The content of this page is provided for informational purposes only and is not a substitute for the advice of a qualified healthcare professional. Consult a doctor for any persistent eye or eyelid symptoms or lesions of uncertain nature.
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