Eye-Hand Coordination Impairment in Glaucoma Patients

Area of Science:

• Ophthalmology
• Neuroscience
• Human Motor Control

Background:

• Glaucoma is a progressive optic neuropathy often leading to visual field loss.
• Eye-hand coordination is crucial for daily activities and can be affected by neurological and visual impairments.

Purpose of the Study:

• To investigate differences in eye-hand coordination between glaucoma patients and normal-sighted controls.
• To explore correlations between eye-hand coordination, visual field defects, visual acuity, and age in glaucoma patients.

Main Methods:

• Utilized the Motor Performance Series (MLS) of the Vienna Test System for eye-hand coordination assessment (aiming, linear tracking, tremor, tapping).
• Assessed visual field (VF) defect severity using Monocular Humphrey Visual Field and binocular Humphrey Esterman Visual Field tests.
• Analyzed correlations between MLS scores, VF defects, visual acuity, and patient age.

Main Results:

• Glaucoma patients exhibited slower aiming, more errors, and prolonged linear tracking and tremor task times compared to controls.
• Tapping tests revealed reduced maximum hand movement frequency in glaucoma patients.
• Asymmetrical VF defects correlated with increased error duration in linear tracking.
• MLS performance declined with increasing age and decreasing visual acuity.

Conclusions:

• Glaucoma patients demonstrate significant deficits in eye-hand coordination compared to normal-sighted individuals.
• While age and visual acuity contribute to these impairments, visual field defects alone do not fully account for the observed eye-hand coordination deficits in glaucoma.