Dry eye disease is a chronic, multifactorial condition caused by abnormalities in the structure and function of the tear film. It is commonly accompanied by dryness, stinging, and eye fatigue, and in more severe cases may compromise corneal health. With increasing use of digital devices and changes in lifestyle habits, the prevalence of dry eye disease has risen steadily, making it one of the most common conditions encountered in ophthalmology. Today, comprehensive diagnostic tools and a wide range of treatment options are available—from artificial tears and medications to advanced optical therapies—allowing for precise management tailored to the underlying causes. Early diagnosis and individualized treatment can effectively control symptoms, protect vision, and improve overall quality of life.
The surface of the eye is covered by a thin protective layer called the tear film, which keeps the eyes moist and clear. This tear film is not simply "water"—it is a precisely organized structure composed of three distinct layers:
Produced by the meibomian glands, this thin oily layer slows evaporation of the underlying tears and helps stabilize the tear film.
Secreted by the lacrimal glands, this is the main component of the tear film. It provides moisture, removes debris, supplies oxygen and nutrients to the cornea, and contains antimicrobial factors.
Produced by conjunctival goblet cells, this layer helps the aqueous layer spread evenly across the ocular surface and adhere properly, preventing tear film breakup.
When any of these three layers is insufficient or compromised in quality, the tear film becomes unstable and breaks up too quickly. As a result, the ocular surface is inadequately lubricated, leading to the various symptoms of dry eye disease. Tears are essential not only for maintaining moisture but also for washing away irritants, providing nutrients and oxygen to the cornea, and offering antimicrobial protection. Therefore, reduced or dysfunctional tear production can significantly impact ocular health.
With modern lifestyle habits—such as prolonged digital device use, exposure to air-conditioned environments, and frequent contact lens wear—the prevalence of dry eye disease continues to rise. Understanding its symptoms, causes, and available treatments is an important step in protecting long-term eye health.
Common Subjective Symptoms
If these symptoms occur frequently and begin to affect daily activities—such as reading, computer use, or driving—it is an appropriate time to seek professional evaluation and treatment.
Dry eye disease has a complex etiology and is generally categorized into the following three types:
Decline in lacrimal gland function with age is one of the most common causes of dry eye disease.
Certain systemic and topical medications may reduce tear production, including antihistamines, antidepressants, antihypertensives, and glaucoma eye drops.
Many systemic conditions can lead to reduced tear secretion. Among the most common are autoimmune diseases such as Sjögren's syndrome, rheumatoid arthritis, and lupus, which attack glandular tissues including the lacrimal glands. Thyroid dysfunction and diabetes may also impair tear secretion or destabilize the tear film.
The autonomic nervous system regulates involuntary functions, including tear secretion. When autonomic balance is disrupted—due to chronic stress, anxiety, poor sleep, or fatigue—lacrimal gland function may become dysregulated, resulting in dry eye symptoms that often fluctuate with emotional or stress-related changes.
Prior ocular surgery, radiation therapy, or infections may damage the lacrimal glands and reduce tear production.
One of the most common causes of dry eye disease. The meibomian glands secrete oils that form the outer lipid layer of the tear film, preventing tear evaporation. When gland function is impaired—either through reduced secretion or poor-quality lipids—the tear film becomes unstable and evaporates more rapidly.
Activities that require sustained visual concentration, such as computer work, smartphone use, or reading, significantly reduce blink frequency, accelerating tear evaporation.
Dry, windy environments, air conditioning, indoor heating, or air pollution can all disrupt tear film stability and increase evaporation.
Contact lenses may destabilize the tear film and contribute to increased tear evaporation.
Conditions such as entropion or ectropion may cause incomplete eyelid closure, leading to excessive tear evaporation.
Demodex mites may induce inflammation of the meibomian glands, worsening meibomian gland dysfunction and contributing to evaporative dry eye.
Many patients with dry eye disease present with both reduced tear production and increased tear evaporation. For this reason, clinicians perform a comprehensive evaluation to determine the relative contributions of each mechanism and to develop an individualized treatment plan.
Beyond patient-reported symptoms, ophthalmologists use specialized instruments and clinical tests to objectively evaluate the tear film, tear secretion, and ocular surface health. Common diagnostic methods include:
A small strip of filter paper is placed inside the lower conjunctival fornix for 5 minutes. The length of moisture on the paper is measured to assess tear secretion.
After instilling fluorescein dye, the time from a complete tear film to its first breakup is measured. A TBUT of less than 5 seconds indicates an unstable tear film and rapid evaporation.
Dyes are used to evaluate whether the ocular surface epithelium is damaged and to detect dry spots or punctate epithelial erosions.
An integrated, high-precision, non-invasive dry eye assessment device. It evaluates multiple dry eye parameters such as non-invasive tear film break-up time, tear meniscus height, meibomian gland morphology and function, and eyelid margin condition. The Keratograph 5M also includes meibography capabilities using infrared imaging to clearly visualize the structure, density, and degree of atrophy of the meibomian glands. This allows clinicians to accurately diagnose Meibomian Gland Dysfunction (MGD) and determine its severity, providing essential information for dry eye classification and treatment planning.
A standardized questionnaire used to assess symptom severity and the impact of dry eye on quality of life.
If autoimmune or systemic diseases are suspected, blood tests for relevant antibodies (such as ANA, SSA/Ro, SSB/La) may be performed.
Heart rate variability (HRV) analysis is used to evaluate the balance of sympathetic and parasympathetic activity, helping determine whether autonomic dysfunction contributes to impaired tear secretion.
Based on the examinations described above, patients with dry eye disease often present with the following objective abnormalities:
A normal tear film should remain stable for more than 10 seconds before breaking up. In many dry eye patients, TBUT is less than 5 seconds, indicating tear film instability and rapid evaporation.
Dry spots or punctate epithelial erosions may be observed on the cornea or conjunctiva, reflecting cellular injury caused by insufficient tear volume or unstable tear film.
The height of the tear meniscus along the lower eyelid margin is decreased, suggesting inadequate tear production.
Findings may include obstructed gland orifices, gland dropout or atrophy, or abnormal meibum quality and expressibility.
Chronic dry eye is frequently associated with ocular surface inflammation, which may present as conjunctival hyperemia, papillary changes, or other inflammatory signs.
The most fundamental treatment. Preservative-free formulations that closely mimic natural tears are recommended. Use frequently as directed by your physician.
Targeted for Meibomian Gland Dysfunction (MGD). Perform warm compresses for 10–15 minutes daily, combined with eyelid cleansing. This helps soften obstructed meibum and improves meibomian gland secretion.
May enhance the quality of the tear film lipid layer and reduce ocular surface inflammation.
Avoid dry or windy environments, use a humidifier, and minimize direct exposure to air conditioning or heating.
Take regular breaks, blink more frequently, and follow the 20-20-20 rule (every 20 minutes, look 20 feet away for 20 seconds).
If ocular surface inflammation is present, the physician may prescribe short-term topical corticosteroids or immunomodulatory eye drops to suppress inflammation and support restoration of lacrimal gland function.
Used when bacterial infection is suspected or when meibomian gland inflammation is significant.
Prepared from the patient's own blood. These drops contain growth factors and essential nutrients that promote ocular surface healing and are indicated for severe dry eye disease.
Silicone or collagen plugs are inserted into the puncta to reduce tear drainage, allowing the tears to remain on the ocular surface for a longer duration.
IPL is a non-invasive light-based treatment primarily used for dry eye disease caused by Meibomian Gland Dysfunction (MGD). It delivers controlled light energy to the periocular skin, targeting abnormal blood vessels and inflammatory processes that contribute to gland dysfunction.
Mechanisms of Action:
IPL therapy typically requires multiple sessions—commonly 3 to 4 treatments spaced 2–4 weeks apart—and is often combined with manual meibomian gland expression to achieve optimal results. As a relatively new modality, IPL offers an effective option for patients with MGD who do not respond adequately to traditional treatments.
If dry eye disease is not treated promptly or remains poorly controlled, it may progress and lead to more serious complications:
Tears play an essential protective role in maintaining ocular surface health. Insufficient tear quantity or poor tear quality compromises this defense mechanism, increasing susceptibility to bacterial, viral, or fungal infections such as conjunctivitis and keratitis.
Chronic ocular surface dryness can injure the corneal epithelium, leading to punctate or patchy epithelial defects. In severe cases, persistent damage may progress to corneal ulceration.
Significant corneal injury may cause scarring of the cornea, resulting in decreased visual clarity. In advanced cases, this may lead to irreversible vision impairment or permanent vision loss.
Persistent inflammation and nerve irritation of the ocular surface can result in chronic ocular pain, which may be difficult to relieve.
Early recognition and treatment of dry eye symptoms are crucial to prevent disease progression and protect long-term ocular health and visual function.
・Please remove all eye makeup in advance. Residual mascara, eyeliner, or contact lenses may interfere with examination and treatment.
・If you have photosensitivity, are pregnant, have any skin conditions, or are currently taking photosensitizing medications, please inform your doctor.
・Mild redness, warmth, or itching around the eyes may occur after treatment. These reactions are normal and typically subside within a few hours to one or two days.
・After the treatment, avoid direct sun exposure, hot baths/saunas, and strenuous exercise. Please use the prescribed eye drops and moisturizing products as instructed by your doctor.
・The procedure is non-invasive and does not require anesthesia; however, protective goggles must be worn during treatment to safeguard the eyes.
Dry Eye Questionnaire
You will complete a standardized questionnaire to assess day-to-day discomfort and preliminarily determine the severity and impact of your dry eye symptoms.
Dry Eye Examination
A series of non-invasive diagnostic tests will be performed, including:
・Tear film stability analysis
・Meibography and evaluation of meibomian gland lipid secretion
・Assessment of conjunctival hyperemia and redness
・Slit-lamp examination of the cornea and conjunctiva
Physician Assessment
Based on the questionnaire results and diagnostic findings, the oculoplastic specialist will determine whether you are an appropriate candidate for IPL treatment, followed by individualized treatment planning and detailed counseling.
Intense Pulsed Light (IPL) Treatment
An eye-safe IPL system is applied to deliver controlled light pulses around the periocular area, helping to activate meibomian gland function, improve lipid secretion, stabilize the tear film, and reduce chronic inflammation.
・Only topical anesthetic eye drops are used to minimize discomfort around the eyes during the procedure.
・No injections or general anesthesia are required. The numbing effect is limited to the ocular surface and naturally subsides within several minutes after treatment.
・Protective eye shields will be applied throughout the procedure, which is performed by trained professionals to ensure safety and maintain a completely non-invasive, incision-free experience.
・Mild redness, warmth, tightness, or itching may occur after treatment. These are normal reactions and typically subside within a few hours. Soothing preservative-free artificial tears may be used as instructed by your doctor.
・Avoid rubbing or touching the eyes, and refrain from wearing contact lenses to prevent interference with ocular surface healing.
・For one week after the procedure, avoid direct sun exposure, strenuous exercise, and sauna/steam environments. Wearing sunglasses outdoors is recommended to reduce irritation.
・Follow your doctor's instructions regarding prescribed eye drops and return for scheduled follow-up visits to assess treatment effectiveness.
・Some patients may require multiple treatment sessions (typically every 2–4 weeks). Your doctor will recommend an individualized treatment plan based on your clinical condition.
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