Tear Film & Dry Eye
Tear instability that causes burning and fluctuating vision. Treating the ocular surface—both for daily comfort and before cataract surgery—makes a major difference in visual quality.
The Tear Film
Tears are much more than water. They form a thin, structured film over the cornea composed of a mucin layer that anchors it to the surface, a watery layer, and an outer lipid (oil) layer produced by the Meibomian glands in the eyelids to prevent evaporation. Because the tear film is the first optical surface of the eye, any irregularity directly affects image sharpness.
Symptoms of Dry Eye
- •Burning, stinging, grittiness, or foreign-body sensation.
- •Redness and eye fatigue, especially later in the day.
- •Fluctuating vision that temporarily clears after blinking.
- •Reflex watery eyes triggered by surface irritation.
- •Discomfort when using screens, in air-conditioned rooms, or in windy environments.
Causes
The most common cause is Meibomian Gland Dysfunction (MGD), which reduces the protective oil layer and causes tears to evaporate rapidly. Other contributing factors include age, hormonal changes, prolonged screen use (which reduces blink rate), contact lenses, certain systemic medications, eye drops with preservatives, and autoimmune conditions.
Why It Matters Before Cataract Surgery with Premium Lenses
For cataract surgery with premium lenses and laser refractive surgery, corneal measurements must be highly accurate. An unstable tear film alters keratometry and topography readings, which can introduce variations in intraocular lens power calculations or mask/simulate astigmatism.
In patients who have both dry eye and cataract, the visual outcome with premium intraocular lenses is far superior when we treat the dry eye first and stabilize the ocular surface prior to final biometric testing and surgery.
Treatment & iLUX Technology
Treatment is personalized and stepped: preservative-free lubricants, eyelid hygiene, environmental and screen-use adjustments, topical anti-inflammatory drops, and targeted therapies for the Meibomian glands.
Dry Eye Treatment with iLUX
At the clinic, we offer treatment with the iLUX system, a technology that applies controlled LED-based thermal pulsation and gentle compression directly to the eyelids to unblock the Meibomian glands and restore the natural lipid layer of the tear film. This treatment is indicated both for patients suffering from daily dry eye symptoms and for pre-operative preparation in patients with dry eye and cataract, ensuring a healthy ocular surface to achieve the full optical potential of premium lenses.
This condition is related to Cataract Surgery & Premium Lenses and Laser Refractive Surgery.
Frequently Asked Questions
If my eyes water frequently, can I still have dry eye?
Yes. Excessive tearing is often a reflex response to an irritated, dry ocular surface whose tear film evaporates too quickly.
Why treat dry eye with iLUX before cataract surgery?
Because treating the ocular surface stabilizes the tear film, ensures much more accurate biometric measurements, and provides a far superior visual result with premium intraocular lenses.
Can patients with dry eye have laser refractive surgery?
Often yes, once the ocular surface is treated and stabilized. In addition, PRK is preferred over LASIK because the eye remains less dry in the long term.