M&S Smart System Contrast Sensitivity Measurements Compared With Standard Visual Function Measurements in Primary...

Area of Science:

• Ophthalmology
• Visual Neuroscience

Background:

• Glaucoma is a progressive optic neuropathy characterized by visual field loss.
• Assessing visual function in glaucoma patients often involves standard automated perimetry (SAP) and visual acuity measurements.
• There is a need for complementary methods to evaluate visual deficits in glaucoma.

Purpose of the Study:

• To evaluate letter contrast sensitivity (CS) deficits in glaucoma patients using the M&S Smart System II.
• To compare letter CS measurements with standard clinical measures of visual function in glaucoma.

Main Methods:

• Ninety-four primary open-angle glaucoma patients were included.
• Tests performed included best-corrected visual acuity (BCVA), letter CS, and Humphrey SITA 24-2 visual field testing.
• Area under the CS function (AUCSF), combining CS and BCVA, was derived and analyzed.

Main Results:

• Letter CS and Humphrey Visual Field mean deviation (HVF MD) showed a significant correlation (r=0.51).
• BCVA correlated significantly with letter CS (r=-0.22) but not HVF MD.
• A subset of patients with minimal visual field or acuity loss exhibited poor letter CS.

Conclusions:

• Letter CS, assessed via the M&S Smart System II, correlates significantly with standard HVF MD.
• Letter CS may serve as a useful adjunct test for visual function in glaucoma.
• The AUCSF is a valuable index for quantifying visual dysfunction in glaucoma patients.