Reliability of Visual Field Index in Staging Glaucomatous Visual Field Damage
Journal Title: Journal of Clinical and Diagnostic Research - Year 2018, Vol 12, Issue 6
Abstract
ABSTRACT Introduction: Standard automated perimetry is integral to the testing of visual function in glaucoma. Classification of glaucomatous visual field defects into different severity levels is important to guide effective management; but the available classification systems may be cumbersome and impractical on a daily basis. Aim: To quantify, correlate and analyse the relation between Visual Field Index (VFI) and the stages of glaucomatous field damage as defined by Hodapp Parrish Anderson (HPA). To check the validity of Glaucoma Staging Indices (GSI), which is a new glaucomatous field classification system dependent on VFI. Materials and Methods: The study was a prospective, observational analysis of consecutive visual field tests done between August 2015 and March 2016. The Institutional Ethical Committee approved the protocol, and participants who gave written informed consent were included in the study. Patients underwent a comprehensive eye examination including standard automated perimetry with Humphrey Visual Field Analyser. Data was collected from each visual field and the fields were evaluated and classified into four stages- Normal, Early defect, Moderate defect or Severe defect based on HPA classification. HPA and Geological Strength Index (GSI) classification systems were compared and analysed with Kappa analysis. Results: Analysis of 170 visual fields of 95 patients showed that VFI was significantly different between Normal, Early defect, Moderate defect and Severe defects as classified with HPA staging, p<0.001. VFI had strong positive correlation with Mean Deviation (MD), r=0.984, p<0.001 and non-linear correlation with Pattern Standard Deviation (PSD), r = -0.472, p<0.001. On comparing HPA staging with GSI, κ=0.633, p<0.001. VFI, MD and PSD in each of the severity stages across the two classification systems showed no significant differences (p>0.05). Conclusion: In established glaucoma, GSI is a good dependable staging system. It is readily available on the single field print out and can be a quick reference for decision making in the management of glaucoma patients.
Authors and Affiliations
Neetha Kuzhuppilly, Shilpa Patil, Shibi Dev, Aditya Deo
Keywords
Related Articles
- EP ID EP524021
- DOI 10.7860/JCDR/2018/34541.11620
- Views 48
- Downloads 0
Caffeine Effect on Bone Mineral Density: A Cross-sectional Study
ABSTRACT Introduction: Osteoporosis is a serious disease of bone, all elderly people and post menopausal women will eventually experience it in their lives. Recent studies have shown that caffeine has a negative effect...
Nasal NK/T Cell Lymphoma Presenting with Perforation of Palate: A Case Report and Review of Literature
Nasal Natural Killer (NK)/T cell lymphoma, commonly mentioned in the literature as Lethal Midline Granuloma (LMG) is an unusual pathology of the oro-maxillo-facial region characterized by aggressive and progressive destr...
Effect of Different Composite Restorations on the Cuspal Deflection of Premolars Restored with Different Insertion Techniques- An In vitro Study
Introduction: This study was conducted to assess the effect of different composite materials on the cuspal deflection of premolars restored with bulk placement of resin composite in comparison to horizontal incremental p...
Comparative Study of Endothelial Cell Loss after Phacoemulsification in Different Anterior Chamber Depth Groups
ABSTRACT Introduction: Corneal decompensation is a rare but potentially vision-threatening complication after phacoemulsification surgery. The evaluation of risk factors for perioperative endothelial cell loss provides i...
Role of Nuclear Morphometry in Screening of Cervical Pap Smear
ABSTRACT Introduction: In India, cervical cancer is the second most common cancer that leads to death in women after breast cancer. Pap smear examination is the primary test for screening cervical cells. Application of t...