Validity of a new disk grading scale for estimating glaucomatous damage: correlation with visual field damage

Area of Science:

• Ophthalmology
• Glaucoma Research
• Optic Nerve Imaging

Background:

• Glaucoma is a leading cause of irreversible blindness.
• Accurate assessment of optic nerve damage is crucial for glaucoma diagnosis and monitoring.
• Existing methods for quantifying glaucomatous optic neuropathy have limitations.

Purpose of the Study:

• To evaluate the correlation between the novel Disk Damage Likelihood Scale (DDLS) and visual field damage in glaucoma patients.
• To assess the utility of DDLS as a measure of glaucomatous optic nerve damage.

Main Methods:

• Retrospective analysis of 282 eyes from patients with primary open-angle glaucoma, low-tension glaucoma, and pseudoexfoliative glaucoma.
• Recording of DDLS stages and vertical disk sizes.
• Masked assessment of visual fields using the Humphrey Field Analyzer and the Hodapp-Parrish-Anderson (HPA) staging system.
• Statistical evaluation using Pearson and Spearman correlation coefficients.

Main Results:

• The DDLS showed a strong correlation with Mean Deviation (MD) (r = -0.695, P <.001) and Pattern Standard Deviation (PSD) (r =.703, P <.001).
• A strong correlation was also observed between the DDLS and the HPA visual field staging system (r =.711, P <.001).
• These significant correlations persisted across different glaucoma subtypes and for small to average-sized optic disks.

Conclusions:

• The Disk Damage Likelihood Scale (DDLS) is a reliable new system for quantifying glaucomatous disk damage.
• DDLS demonstrates a strong correlation with the extent of visual field loss in glaucoma.
• This scale holds promise for improved assessment and management of glaucoma.