TearCheck and Meibography: Imaging Your Tear Film and Meibomian Glands

You cannot manage what you cannot measure, and for most of optometry's history the tear film could barely be measured at all. Modern imaging changed that. This article explains the two imaging technologies at the centre of our dry eye workup: the TearCheck tear-film analysis platform, and infrared meibography.

TearCheck: the tear film, measured without touching it

TearCheck (ESW Vision — the same company behind the E-Eye IPL used across our practices) runs a battery of non-invasive examinations in under ten minutes. Nothing touches your eye and no dye is instilled, which matters: the moment you disturb a tear film, you change what you are trying to measure.

Tear film stability — TFSE/NIBUT

The headline number. The device projects a pattern onto the tear surface and tracks its micro-movements over ten seconds after a blink, computing a non-invasive break-up time — how long your tear film holds together before it ruptures and exposes the surface beneath. A healthy film stays stable comfortably beyond ten seconds; films that collapse in three or four explain symptoms that arrive mid-blink-cycle: the sting, the blur, the reflex watering.

Tear meniscus height

Along your lower lid sits a thin reservoir of tears — the meniscus. Its height is a proxy for tear volume, separating evaporative dry eye (normal volume, unstable film) from aqueous-deficient dry eye (simply not enough tears). The distinction matters enormously: a treatment that unblocks oil glands cannot fix a volume problem, and vice versa.

Blink analysis

Over one minute the device records every blink and classifies it as complete or abortive. Incomplete blinking — endemic in screen work — leaves the lower third of the cornea unwiped and the oil glands unexpressed. A high abortive-blink rate changes the plan: no device treatment will hold if the blink itself never spreads the tears.

Redness, inflammation risk and Demodex imaging

The platform also grades bulbar redness (an objective inflammation track-marker between visits), computes an ocular surface inflammatory risk evaluation (OSIE), and captures magnified lash-base images that help identify the collarettes of Demodex infestation.

Meibography: the image that changes decisions

Infrared meibography photographs the meibomian glands through the everted eyelid — something ordinary examination simply cannot see. Healthy glands appear as long, parallel vertical stripes running the full height of the lid, like the teeth of a comb. Diseased lids show the stripes shortened, kinked, dilated — or missing altogether. The device quantifies this as a percentage of gland loss (clinicians grade it as a “meiboscore”).

This is the most consequential image in the entire workup, for one hard reason: gland tissue that atrophies does not grow back. Meibography therefore answers the questions that drive every treatment decision. How much functioning gland tissue remains to save? Is this early obstruction — glands intact but blocked, the ideal moment for LipiFlow or IPL — or late disease, where expectations and strategy must change? And at review a year later: has the loss been arrested?

It is also, candidly, the image that convinces patients. Symptoms fluctuate and are easy to discount; a photograph of your own glands, half of them gone, is not.

What imaging cannot do

Honest limits: imaging describes the tear film and glands, but it does not feel your symptoms — severity of signs and severity of suffering correlate poorly in dry eye, which is why the workup starts with a symptom questionnaire and ends with a conversation. Nor does imaging replace the slit lamp: vital-dye staining and osmolarity add the surface-damage and tear-chemistry layers that cameras cannot capture. The power is in the combination.

See your own tear film

Every Dry Eye Specialist Group assessment includes non-invasive tear film analysis, and meibography where indicated — with the images reviewed with you, on screen, in plain language. Explore our treatments or book an assessment with your nearest member practice.

References

• Wolffsohn JS, Craig JP, et al. TFOS DEWS II Diagnostic Methodology Report. The Ocular Surface. 2017;15(3):539-574.
• Arita R, Itoh K, Inoue K, Amano S. Noncontact infrared meibography to document age-related changes of the meibomian glands in a normal population. Ophthalmology. 2008;115(5):911-915.
• Nichols KK, Foulks GN, Bron AJ, et al. The International Workshop on Meibomian Gland Dysfunction: Executive Summary. Investigative Ophthalmology & Visual Science. 2011;52(4):1922-1929.
• ESW Vision. tearcheck examination suite — manufacturer specifications.