Parkinson's disease (PD) is a common neurodegenerative disorder which is characterized by both motor and non-motor symptoms and usually affects people aged 50 years or above. Many studies showed eye movement deficits and visual changes in patients with PD. Previous studies have also indicated that clinical eye movement training could enhance the functional performance of patients with various eye movement problems resulting from ocular and neurodegenerative diseases. In this study, we will investigate the effectiveness of eye movement training on dynamic vision and functional performance in PD patients with oculomotor deficits.
Study Type
INTERVENTIONAL
Allocation
RANDOMIZED
Purpose
OTHER
Masking
DOUBLE
Enrollment
27
Leisure activities
Eye movement training
Allen MY Cheong
Hong Kong, Hong Kong
Smooth Vergence eye movements
Smooth vergence eye movement is measured using a head-mounted eye tracking while fixating at an approaching target moving at different speeds
Time frame: Change from baseline at week 4 and change from baseline at week 12
Oculomotor characteristics
With the use of eye tracking device, eye movement behavior of participants can be measured and analysed while performing the following tasks. 1. Fixation task - Fixate at stationary target presented on a monitor 2. Saccade task - Follow and fixate at a random jumping target presented on a monitor 3. Pursuit task - Follow accurately and steadily on a smooth moving target presented on a monitor 4. Jump Vergence task - Follow and fixate a jumping target presented in the anterior-posterior plane (jumping from 'far to near' or 'near to far')
Time frame: Change from baseline at week 4 and change from baseline at week 12
Sentence reading performance
To evaluate the effectiveness of the interventions on sentence reading using MNREAD charts in Chinese. These charts developed in our laboratory are used to measure the effectiveness of sentence reading in terms of reading speed and critical print size.
Time frame: Change from baseline at week 4 and change from baseline at week 12
Passage reading performance
To evaluate the effectiveness of the interventions on passage reading using International Reading speed Test (IReST). IReST is used to evaluate the effectiveness of passage reading performance by measuring the reading speed.
Time frame: Change from baseline at week 4 and change from baseline at week 12
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