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Evaluation of eye movements pattern during reading process in patients with glaucoma: a microperimeter study
Angelica Cerulli1, Massimo Cesareo, Elena Ciuffoletti
1* These authors contributed equally to this work.
European Journal of Ophthalmology
|December 17, 2013
Summary
Patients with primary open-angle glaucoma (POAG) show altered eye movement patterns during reading. These reading differences, particularly in horizontal and vertical eye movements, may stem from the neurodegenerative effects of glaucoma on visual pathways.
Area of Science:
- Ophthalmology
- Neuroscience
- Visual Science
Background:
- Primary open-angle glaucoma (POAG) is a progressive optic neuropathy affecting the central visual pathway.
- Reading involves complex visual-motor coordination, and alterations in eye movements can impact reading performance.
Purpose of the Study:
- To investigate the characteristics of eye movements during reading in patients with POAG.
- To compare the reading-related eye movement patterns of POAG patients with those of healthy controls using a microperimeter.
Main Methods:
- Thirty-two patients with early to moderate POAG and 34 healthy controls participated.
- Eye movements during a reading task were recorded using the Nidek MP1 microperimeter.
- Key metrics included maximum (Xmax, Ymax) and minimum (Xmin, Ymin) eye movement extents and mean ocular movement speed.
Main Results:
- Patients with POAG exhibited significantly greater horizontal (Xmax) and vertical (Ymax) eye movement extents compared to controls (p=0.003 and p<0.001, respectively).
- These significant differences were observed even when comparing only stage 1 POAG patients to controls.
- No significant differences were found in minimum eye movement extents (Xmin, Ymin) or mean ocular movement speed between the groups.
Conclusions:
- Significant alterations in eye movement patterns during reading were identified in patients with POAG.
- These observed changes in ocular motility during reading may be associated with the neurodegenerative processes affecting the visual pathways in glaucoma.
