Prediction of glaucomatous visual field progression: pointwise analysis

Area of Science:

• Ophthalmology
• Neuroscience
• Medical Imaging

Background:

• Glaucoma is a progressive optic neuropathy leading to visual field (VF) loss.
• Early detection and prediction of VF loss are crucial for managing glaucoma.
• Retinal sensitivity measures offer potential biomarkers for glaucoma progression.

Purpose of the Study:

• To determine if pointwise regression analysis of serial retinal sensitivity measures can predict future VF loss in glaucoma patients.
• To compare the rate of change in retinal sensitivity between early and late follow-up periods.

Main Methods:

• Retrospective analysis of 158 glaucoma patients with at least 6 years of follow-up and 10 reliable VF exams.
• Linear and first-order exponential regression analyses of retinal sensitivity against time were performed for each VF test location.
• Paired t tests compared regression slopes between early and late follow-up periods.

Main Results:

• The inferior nasal location exhibited the highest rate of change (-0.52 dB/year) in the early period using linear regression.
• Generally, the late follow-up period showed a faster rate of progression than the early period.
• Superior arcuate, superior nasal, and inferior nasal locations demonstrated consistent rates of change, while central and peripheral locations showed significant differences between early and late periods.

Conclusions:

• Specific visual field areas, including superior arcuate and superior/inferior nasal regions, exhibit consistent retinal sensitivity changes, suggesting their utility in predicting future deterioration.
• Considering the location of sensitivity changes is important for predicting glaucomatous VF progression.