Dry Eye

Understanding Dry Eye

Dry eye disease (DED) is a common and often persistent ocular surface condition. The latest evidence-based definitions and guidelines are summarised in the TFOS DEWS III report.

According to DEWS III:

Dry eye is defined as “a multifactorial, symptomatic disease characterized by a loss of homeostasis of the tear film and/or ocular surface, in which tear film instability and hyperosmolarity, ocular surface inflammation and damage, and neurosensory abnormalities are etiological factors.”

The classification has evolved beyond just “aqueous-deficient vs evaporative” to include multiple etiologic drivers — e.g., lipid/lid-margin issues, meibomian gland dysfunction (MGD), blink behaviour, eyelid disease, and iatrogenic causes.

Management now emphasises an algorithmic approach: screening (questionnaire), objective tests (tear breakup time, osmolarity), and ocular surface/lid margin exam.

Treatment strategies focus on tear film replenishment & conservation, lid margin/lid hygiene, meibomian gland therapies, anti-inflammatory approaches, and lifestyle/adjunctive therapies.

Why Dry Eye Happens

Some of the key mechanisms include:

• Tear film instability – tears evaporate too quickly or are of poor quality.
• Hyperosmolarity of the tear film – salts become concentrated, damaging cells.
• Inflammation of the ocular surface and eyelids – worsens symptoms and drives dysfunction.
• Meibomian gland dysfunction (MGD) – when the glands that secrete the oily layer of the tear film are blocked or dysfunctional, leading to evaporative dry eye.
• Eyelid margin disease (blepharitis) – biofilm or debris on the eyelid margin can obstruct glands and cause inflammation.

Recognising the eyelid margin/lid-hygiene component is very important in modern dry eye care — and that’s where treatments like ZEST and NuLids Pro come in.

Treatment Options: ZEST & NuLids Pro

Here we focus on two current in-office or device-assisted treatments aimed at lid hygiene, debris removal, meibomian gland stimulation, and improving tear film quality.

ZEST (Zocular Eyelid System Technology)

What is it?ZEST is an in-office procedure that uses an okra-based gel and micro-applicators to cleanse the eyelid margins, remove biofilm and debris, unblock meibomian glands, and reduce eyelid inflammation.

How it works:

• The gel (derived from okra polysaccharides plus vitamins, lutein, zeaxanthin, and flavonoids) is applied to the lashes/eyelid margin.
• A microsponge or foam applicator gently “lathers” the gel to lift off debris, biofilm, oil, and even Demodex mites if present.
• After cleansing, the gel is rinsed off, helping to reopen blocked meibomian glands.
• Once cleaned, the lid margin allows other therapies (warm compresses, IPL, etc.) to be more effective.

Who is it for?

• Patients suffering from blepharitis, MGD, or dry eye symptoms due to eyelid margin disease.
• Those with red, flaky, crusty eyelids, or Demodex infestation.
• Anyone with contact lens intolerance due to lid/gland issues.

What to expect:

• Quick (5–15 minutes), typically painless procedure with no anaesthetic required.
• Many patients report noticeable relief soon after treatment.
• For ongoing benefit, good at-home lid hygiene and maintenance are important.

Strengths & considerations:

• Targets a root cause (eyelid margin debris and gland blockage).
• Simple, in-office treatment that complements other therapies.
• Results may vary; a consistent home routine is still required.
• Availability and cost may differ by practice.

NuLids Pro

What is it?NuLids Pro is a handheld device for eyelid hygiene, meibomian gland stimulation, and removal of debris at the eyelid margin. It can be used in-practice or at home (depending on the version).

How it works:

• A soft oscillating tip gently massages the eyelid margin to loosen debris and stimulate the glands.
• Helps restore normal oil flow into the tear film.
• Some versions are designed for home use (1 minute/day), others for professional in-office treatments.

Who is it for?

• Patients with blepharitis, MGD, or evaporative dry eye linked to lid margin issues.
• Those wanting a convenient, device-based alternative to manual lid scrubs.

What to expect:

• Clinical studies show improved OSDI scores and tear breakup time after 30 days of daily use.
• Works best alongside other therapies like warm compresses and lid hygiene.

Strengths & considerations:

• Enables at-home maintenance between appointments.
• Non-pharmacologic, targets lid margin and gland function.
• Requires commitment to daily use and device maintenance.
• Not a standalone cure — best used as part of a comprehensive treatment plan.

Integrating Treatments & Management Strategy

Given the multifactorial nature of dry eye (as emphasised in DEWS III), a layered treatment strategy works best.

Diagnosis & Assessment

• Use validated questionnaires, tear film tests, and ocular surface exams.

Basic / Home Care

• Warm compresses and lid massage
• Lid hygiene (wipes or scrubs)
• Optimise environment (humidity, reduced screen time, healthy blink habits)
• Artificial tears or lubricants

Lid-Margin / Gland Therapies

• ZEST deep cleaning
• NuLids Pro maintenance

Adjunctive / Advanced Therapies

• Meibomian gland expression, IPL, RF
• Anti-inflammatory medication
• Tear film or lipid layer enhancement
• Surgical options in advanced cases

Maintenance & Follow-Up

Dry eye is often chronic — consistent home care and periodic reviews are key.

Why Choose ZEST or NuLids Pro?

• They address eyelid margin health and meibomian gland function, major drivers of evaporative dry eye.
• Complement other therapies rather than relying solely on drops.
• ZEST offers an immediate in-office “reset,” while NuLids Pro supports ongoing maintenance.
• Both are supported by recent evidence and DEWS III recommendations.

Summary

Dry eye disease is not simply “not enough tears.”It’s a complex interaction between the tear film, ocular surface, eyelid margin, and gland function.

The latest framework (TFOS DEWS III) highlights the importance of addressing lid margin disease and meibomian dysfunction — areas where ZEST and NuLids Pro can make a real difference.

By working closely with your eye care professional to identify your dry eye type and build a tailored regimen — combining home care and in-office treatments — you can achieve lasting comfort and healthier eyes.

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