Diabetic macular oedema (DMO) is a sight-threatening problem for diabetic patient who has swelling in macula. Patients with DMO can receive laser treatment and achieve good acuity finally. However, some patients still have difficulties in reading even after proper treatment. In this project, the investigators aimed to explore the effectiveness of different training paradigms in improving reading performance in patients with DMO.
Patients with diabetic macular oedema (DMO), after receiving laser photocoagulation, achieved good outcomes in distance acuity. However, some patients, particularly those developing parafoveal scotoma, still had difficulty in reading. Inability to read or reading very slowly leads to the potential loss of job, as well as the enjoyment of reading for leisure. In this study, the investigators aimed to investigate the effectiveness of reading rehabilitation using perceptual learning paradigms in enhancing reading performance in patients with reading difficulties due to DMO. Also, the fundamental mechanisms explaining the reading problems in patients with DMO reading Chinese will be examined. The investigators hypothesize that the perceptual training would show an improvement in reading. The investigators' primary hypothesis is that temporal visual processing speed and spatial visual span will be improved after perceptual training. The investigators' secondary hypothesis is that the reading speed and fixation stability will be improved after training.
Study Type
INTERVENTIONAL
Allocation
RANDOMIZED
Purpose
OTHER
Masking
SINGLE
Enrollment
55
Visual Processing Training
Spatial visual span training
Visual processing speed and spatial visual span training
Allen MY Cheong
Hong Kong, China
Change in visual processing speed
Using trigrams to measure the character-recognition accuracy while characters are presented at different exposure times
Time frame: Change from baseline at week 6 and change from baseline at week 12 week
Change in visual span size
Using trigrams to measure the character-recognition accuracy while characters are presented at different positions
Time frame: Change from baseline at week 6 and change from baseline at week 12 week
Change in reading performance
Measured in three different ways for Chinese: 1. Rapid serial visual presentation (RSVP) 2. Sentence reading (MNREAD) 3. Passage reading (IReST)
Time frame: Change from baseline at week 6 and change from baseline at week 12 week
Change in fixation stability
Fixation stability will be measured by MP-1 microperimeter.
Time frame: Change from baseline at week 6 and change from baseline at week 12 week
Change in Chinese version of Impact of Visually Impaired (C-IVI) measure
Self evaluated instrument to measure vision related restriction of participation in daily living.
Time frame: Change from baseline at week 6 and change from baseline at week 12 week
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