June 2017
Volume 58, Issue 8
Open Access
ARVO Annual Meeting Abstract  |   June 2017
Association of Ocular Dominance and Humphrey Visual Field Parameters: Mean Deviation, Pattern Standard Deviation, and Visual Field Index
Author Affiliations & Notes
  • Sharnjit Bains
    Surgery - Ophthalmology, McMaster University, Hamilton, Ontario, Canada
  • Nadia Hua
    Surgery - Ophthalmology, McMaster University, Hamilton, Ontario, Canada
  • Enitan Sogbesan
    Surgery - Ophthalmology, McMaster University, Hamilton, Ontario, Canada
  • Footnotes
    Commercial Relationships   Sharnjit Bains, None; Nadia Hua, None; Enitan Sogbesan, None
  • Footnotes
    Support  McMaster University Surgical Association Grant
Investigative Ophthalmology & Visual Science June 2017, Vol.58, 2836. doi:
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      Sharnjit Bains, Nadia Hua, Enitan Sogbesan; Association of Ocular Dominance and Humphrey Visual Field Parameters: Mean Deviation, Pattern Standard Deviation, and Visual Field Index. Invest. Ophthalmol. Vis. Sci. 2017;58(8):2836.

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

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Abstract

Purpose : This study aims to determine whether ocular dominance is associated with glaucoma severity using visual field (VF) parameters in glaucoma patients.

Methods : Consented glaucoma patients underwent a complete standardized ophthalmological assessment including baseline Humphrey Visual Fields (HVF). Ocular dominance was determined using the Dolman Test (hole-in-the-card). HVF mean deviation (MD), pattern standard deviation (PSD) and visual field index (VFI) for each eye was extracted from the HVF printout and classified. Glaucoma severity was determined based on HVF by using standardized Glaucoma Staging System, as recommended by the Canadian Ophthalmology Society’s clinical practice guidelines for the treatment of glaucoma. Data was analyzed using SPSS Software v20.

Results : Patients (n = 207) mean age was 67.5 ± 10.6 years; 35.3% were male and 64.7% were female and approximately 90.3% Caucasian population. Right-eye dominance was observed in 58.8%, left-eye dominance in 38.2%, and 3.4% were both-eyed dominant. Paired t-test analysis of HVF-MD was found to be lower in the non-dominant eye (-4.92 ± 6.54, p<0.001) and higher in the dominant eye (-2.77 ± 4.24, p<0.001). There was a greater proportion of suspect and early (87.5%) stages of glaucoma severity for MD in the dominant eye compared to the non-dominant eye which tended to have greater proportions within moderate to severe (24.0%) glaucoma. VFI was found to be higher in the dominant eye (93.5 ± 12.2, p<0.001) compared to the non-dominant eye (87.7 ± 19.8, p<0.001). PSD was found to be higher in the non-dominant eye (4.00 ± 3.47, p<0.001) indicating greater variation compared to the dominant eye (3.02 ± 2.69, p<0.001). This study shows that the non-dominant eye has greater glaucoma severity based on lower MD, lower VFI, and an increase in the proportion of patients who progressed into more severe stages of glaucoma classification in the non-dominant eye.

Conclusions : Glaucoma appears to be more severe in the non-dominant eye using HVF parameters. The dominant eye tends to have a protective effect on glaucoma onset and severity based on higher MD, higher VFI, a lower variation of PSD and the occurrence of less severe glaucoma classifications in the suspect and early stage categories. This study shows that glaucoma progression is independent of ocular dominance and occurs in either eye.

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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