Study of noncontact air-puff applanation tonometry IOP measurement on irregularly-shaped corneas

Wai W. Wang; Kuo-Jen Wang; Che-Liang Tsai; I-Jong Wang

doi:10.1117/12.2269292

18 April 2017 Study of noncontact air-puff applanation tonometry IOP measurement on irregularly-shaped corneas

Wai W. Wang, Kuo-Jen Wang, Che-Liang Tsai, I-Jong Wang

Proceedings Volume 10251, Biomedical Imaging and Sensing Conference; 102511X (2017) https://doi.org/10.1117/12.2269292
Event: SPIE Technologies and Applications of Structured Light, 2017, Yokohama, Japan

Abstract

Abnormal corneas with corneal tissue defects like ulceration, melting, laceration, thinning scar, keratoconus etc., poses special challenges for ophthalmologist to measure intraocular pressure (IOP) correctly using air-puff noncontact applanation tonometry. Here, we propose an novel model, Abnormal Applanation IOP Model (AAIOP), to simulate IOP in these abnormal corneas on an air-puff noncontact applanation tonometry system, and the simulated IOP results are correctly fit in those of IOP measured database on human eyes of 91,024 patients (174,666 eyes)¹). Our simulated IOP indicates that every 10 μm of central corneal thickness change results in 0.36 mmHg of IOP change. Using our simulation model, the IOP on abnormal eyes with irregularly-shaped corneas can be correctly expected and reported.

Citation Download Citation

Wai W. Wang, Kuo-Jen Wang, Che-Liang Tsai, and I-Jong Wang "Study of noncontact air-puff applanation tonometry IOP measurement on irregularly-shaped corneas", Proc. SPIE 10251, Biomedical Imaging and Sensing Conference, 102511X (18 April 2017); https://doi.org/10.1117/12.2269292

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