June 2017
Volume 58, Issue 8
Open Access
ARVO Annual Meeting Abstract  |   June 2017
Advances in imaging of Optic Disc Edema : Role of Oximetry and its relation with visual feild defects
Author Affiliations & Notes
  • NEHA SUDHAKAR Sudhakar PERAKA
    Vitreoretina, Narayana Nethralaya, Bangalore, Karnataka, India
  • Abdul Rawoof
    Neurophthalmology, Narayana nethralaya, Bangalore, Karnataka, India
  • Naresh Kumar Yadav
    Vitreoretina, Narayana Nethralaya, Bangalore, Karnataka, India
  • Rohit Shetty
    Cornea and Refractive Surgery, Narayana Nethralaya, Bangalore, Karnataka, India
  • Ashwin Mohan
    Vitreoretina, Narayana Nethralaya, Bangalore, Karnataka, India
  • Footnotes
    Commercial Relationships   NEHA SUDHAKAR PERAKA, None; Abdul Rawoof, None; Naresh Yadav, None; Rohit Shetty, None; Ashwin Mohan, None
  • Footnotes
    Support  None
Investigative Ophthalmology & Visual Science June 2017, Vol.58, 3310. doi:
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      NEHA SUDHAKAR Sudhakar PERAKA, Abdul Rawoof, Naresh Kumar Yadav, Rohit Shetty, Ashwin Mohan; Advances in imaging of Optic Disc Edema : Role of Oximetry and its relation with visual feild defects. Invest. Ophthalmol. Vis. Sci. 2017;58(8):3310.

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

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Abstract

Purpose :
To determine role of oximetry in calculating oxygen saturation in cases with optic disc edema and establishing correlation with visual field defects

Methods : Twenty consecutive eyes diagnosed to have disc edema secondary to various pathologies diagnosed on basis of clinical examination underwent non-invasive dual wavelength photo-spectrometric imaging of the retina (Oxymap T1, Oxymap hf, Reykjavik, Iceland) to determine the oxygen saturation in the retinal vessels and their diameters. They also underwent standard automated perimetry on the Humphrey Field Analyzer (HFA™,Carl Zeiss Meditec) The retinal oximetry values obtained were compared with age matched normals and also correlated with mean deviation on automated perimetry

Results : Arteriolar diameters were reduced and venous diameters were increased in the affected eyes. Arteriolar saturations were increased, venous saturations were decreased and arterio-venous saturation difference (AVSD) was increased as compared to the age matched normals. Significant positive correlation has been noted between arteriolar saturation and mean deviation

Conclusions : Decreased arteriolar diameters and increased venous diameters suggest stasis possibly due to the increased pressure due to optic nerve head edema. This may result in increased arterio-venous transit time thus allowing more time for oxygen exchange. This could possibly explain the increased arterio-venous saturation difference. Oximetry may be useful in the screening and quantifying the imapct of disc edema on visual function in patients with disc edema

This is an abstract that was submitted for the 2017 ARVO Annual Meeting, held in Baltimore, MD, May 7-11, 2017.

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