Severity and stability of glaucoma: patient perception compared with objective measurement

Area of Science:

• Ophthalmology
• Visual Science

Background:

• Glaucoma is a progressive optic neuropathy often associated with visual field loss.
• The relationship between subjective patient experience and objective visual field measurements in glaucoma is not fully understood.
• Current understanding sometimes portrays glaucoma as a silent disease until advanced stages.

Purpose of the Study:

• To correlate subjective patient reports of visual loss severity and functional decline with objective visual field measurements in glaucoma patients.
• To investigate if perceived visual deterioration aligns with measurable changes in visual fields.

Main Methods:

• Patients with glaucoma completed questionnaires on perceived visual disability and underwent binocular visual field testing.
• A separate group had their monocular visual field tests analyzed retrospectively for deterioration.
• Statistical analysis, including pointwise linear regression, was used to assess visual field stability.

Main Results:

• Patient-reported difficulties with mobility (e.g., stairs, bumping into objects) strongly correlated with binocular visual field scores.
• A significant association (P<.01) was found between perceived visual deterioration and objectively measured bilateral visual field deterioration.
• Patients noticing gradual visual decline were twice as likely to have bilateral visual field deterioration.

Conclusions:

• Subjective reports of visual disability are linked to the severity of binocular visual field loss in glaucoma.
• Perceived visual deterioration is a strong indicator of underlying bilateral visual field decline.
• These findings suggest glaucoma may present with noticeable symptoms even in mild-to-moderate stages, contrary to the "insidious process" belief.