tear meniscus

tear meniscus 

A thin strip of tear fluid with concave outer surfaces at the upper and lower lid margins. It contains most of the exposed tear volume. The absence of a tear meniscus is an indication of a dry eye. Syn. marginal tear strip; lacrimal prism; tear prism. See precorneal film; lacrimal lake.
References in periodicals archive ?
Meniscus injuries can be classified and direction describing the geometry of the tear meniscus damage there as longitudinal, radial, horizontal, and combinations of these.
Using a single use, disposable test chip, 100nl of tear fluid is collected by passive capillary action from the tear meniscus.
Tear meniscus height: Another way to measure tear quantity, particularly useful in diagnosing aqueous deficient dry eye is to measure the tear meniscus height (see Figure 3).
The agreement and repeatability of tear meniscus height measurement methods.
Strip meniscometry: a new and simple method of tear meniscus evaluation.
A preoperative assessment of tear meniscus height was done using slit lamp after staining the tear film with 2% Fluorescein, ROPLAS (Regurgitation on pressure over lacrimal sac area) and sac syringing was performed with normal saline and results noted.
Patency of lacrimal passage was tested by objective tests like height of tear meniscus and lacrimal syringing and the results were documented.
Lower tear meniscus height (LTMH), depth (LTMD), area (LTMA) and a-angle were measured.
Although not adequate by itself, tear meniscus parameters measured with OCT, LTMH and LTMA, may be helpful for evaluating the efficacy of treatment, and the correlation of these two parameters with the OSDI score may increase the objectivity while questioning the symptoms.
The University of Ulster's Owen Coyles led a presentation on Non-Invasive Measurement of Tear Meniscus Height (TMH) and Tear Break-Up Time (NITBUT).
Purpose: To assess the tear function tests and the lower tear meniscus height (LTMH) in keratoconus patients and to evaluate the relationship of these parameters with the progression of keratoconus.
Tear film tests including Schirmer test, tear meniscus height measurement and tear break-up time (TBUT) were done in all patients.