May 2008
Volume 49, Issue 13
Free
ARVO Annual Meeting Abstract  |   May 2008
Intraocular Pressure and Ocular Pulse Amplitude Profile During the Modified Diurnal Tension Curve Using Dynamic Contour Tonometry
Author Affiliations & Notes
  • A. Barreira
    Glaucoma, University of Sao Paulo, Sao Paulo, Brazil
  • G. Vasconcelos Moraes
    Glaucoma, University of Sao Paulo, Sao Paulo, Brazil
  • A. Reis
    Glaucoma, University of Sao Paulo, Sao Paulo, Brazil
  • R. Vessani
    Glaucoma, University of Sao Paulo, Sao Paulo, Brazil
  • M. Sano
    Glaucoma, University of Sao Paulo, Sao Paulo, Brazil
  • M. Hatanaka
    Glaucoma, University of Sao Paulo, Sao Paulo, Brazil
  • R. Susanna, Jr.
    Glaucoma, University of Sao Paulo, Sao Paulo, Brazil
  • Footnotes
    Commercial Relationships  A. Barreira, None; G. Vasconcelos Moraes, None; A. Reis, None; R. Vessani, None; M. Sano, None; M. Hatanaka, None; R. Susanna, None.
  • Footnotes
    Support  None.
Investigative Ophthalmology & Visual Science May 2008, Vol.49, 1056. doi:https://doi.org/
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    • Get Citation

      A. Barreira, G. Vasconcelos Moraes, A. Reis, R. Vessani, M. Sano, M. Hatanaka, R. Susanna, Jr.; Intraocular Pressure and Ocular Pulse Amplitude Profile During the Modified Diurnal Tension Curve Using Dynamic Contour Tonometry. Invest. Ophthalmol. Vis. Sci. 2008;49(13):1056. doi: https://doi.org/.

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      © ARVO (1962-2015); The Authors (2016-present)

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Abstract

Purpose: : To determine the IOP and OPA profile during the Modified Diurnal Tension Curve (mDTC) using DCT.

Methods: : Prospective study involving forty primary open angle glaucomatous eyes. All subjects were under topical treatment. The selected patients were submitted to the (mDTC) using DCT (SMT Swiss Microtechnology AG, Zurich, Switzerland). The measurements were performed at 8 am, 10 am, 2 pm and 4 pm. IOP and OPA were recorded and analyzed. Statistical analysis was performed using paired student t-test.

Results: : Female and Caucasians represented 75% and 60% respectively. The average age was 54 years (range 38-71). The mean IOP values during mDTC were 19.68 (±4.68); 17.63 (±4.44); 17.25 (±5.41) and 17.32 (±4.25) mmHg, and the APO values were 2.82 (±1.49); 2.98 (±1.6); 2.96 (±1.5); 3.11 (±1.81), respectively.

Conclusions: : The DCT IOP measurements were higher during the morning, which is consistent with other tonometers in previous studies. There was an inverse correlation between IOP and APO during mDTC, which showed higher IOP values and lower APO values in the morning. The study demonstrates a low blood flow/ IOP ratio in the morning compared to other day measurements, which might result in perfusion stress in the optic nerve head.

Keywords: intraocular pressure • outflow: trabecular meshwork • stress response 
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