The Dry Eye Zone

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Abstract: Tear meniscus changes after instilling artificial tear

Gosh. Artificial tears make things temporarily better... who woulda thunk.

Dynamic Changes in the Lower Tear Meniscus After Instillation of Artificial Tears.
Cornea. 2010 Feb 15. [Epub ahead of print]
Wang Y, Zhuang H, Xu J, Wang X, Jiang C, Sun X.
From the Department of Ophthalmology, Eye and ENT Hospital of Fudan University School of Medicine, Shanghai, China.

PURPOSE:: To compare the dynamic changes in lower tear meniscus area (TMA) and height after instillation of artificial tears in patients with dry eye and healthy controls.

METHODS:: Twenty-two eyes of 11 patients with dry eye and twenty eyes of 10 age- and sex-matched healthy subjects were included. The inferior tear meniscus height and area measurements were taken before and after instillation of 35 muL carboxymethyl cellulose (CMC) 0.5% and 1.0% (Allergan, Irvine, CA) on 2 consecutive days. The measurements were obtained before and 1, 5, 10, 15, and 30 minutes after instillation using anterior segment optical coherence tomography, RTVue-100 (RTVue, Optovue, Inc).

RESULTS:: The baseline lower TMA and height in the dry eye group were significantly lower than in the control group. A significant increase in TMA and height was found at 1 minute post instillation of 0.5% CMC in both groups, with findings returning to baseline levels at 5 and 10 minutes post instillation in the control group and dry eye group, respectively. The increase in TMA and height persisted for a longer time period in both groups with 1% CMC, versus 0.5% CMC. At 15 and 30 minutes, both tear meniscus parameters were still significantly higher in the control group and dry eye group, respectively.

CONCLUSIONS:: Artificial tears provide a significant yet temporary improvement in the tear meniscus. The anterior segment optical coherence tomography is valuable to measure dynamic changes in the tear meniscus