Twenty Four Hour Intraocular Pressure Indicators Distinguish Normal Tension Glaucoma from Healthy Eyes Measured with a Contact Lens Sensor.
J Glaucoma 2022;
31:639-644. [PMID:
35766388 DOI:
10.1097/ijg.0000000000002071]
[Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2022] [Accepted: 06/12/2022] [Indexed: 11/26/2022]
Abstract
PRCIS
The cut-off values of CLS.
PURPOSE
We conducted the present study to determine (1) the best factor for distinguishing normal tension glaucoma (NTG) and non-glaucoma subjects based on the intraocular pressure (IOP) values measured by a contact lens sensor (CLS) and (2) the optimal cut-off values of that factor.
SUBJECTS AND METHODS
The eyes of 18 non-glaucoma subjects and 26 NTG patients were examined. We evaluated five indicators: maximum IOP value, standard deviation (SD), IOP fluctuation range, the cosine-fit curve amplitude, and the amplitude of dual-harmonic regression values. We determined the indicators' cut-off values to distinguish between non-glaucoma subjects and NTG patients with the area under the curve (AUC).
RESULTS
The mean IOP values were 12.3±2.7 mmHg in the non-glaucoma eyes and 12.5±3.1 mmHg in the NTG eyes (P=0.824). All five indicators were significantly higher in the NTG group. The best factor to distinguish the non-glaucoma subjects and NTG patients was the IOP fluctuation range (P<0.0001, AUC=0.844); the cut-off level value was 436.5 millivolt equivalents.
CONCLUSIONS
24 hour IOP measurements with a CLS showed that among IOP indicators studied, the range of IOP fluctuation was most important and significantly larger in NTG eyes compared to non-glaucoma eyes.
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