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Vection Responses in Patients With Early Glaucoma
Taylor A Brin1,2, Luminita Tarita-Nistor1, Esther G González1,2
1Krembil Research Institute, Toronto Western Hospital.
Journal of Glaucoma
|November 22, 2018
Summary
Patients with glaucoma show longer vection latencies, indicating altered visual-motor responses. However, the combined index of structure and function (CSFI) did not correlate with these vection measures in our study.
Area of Science:
- Ophthalmology
- Neuroscience
- Human Perception
Background:
- Glaucoma is a progressive optic neuropathy characterized by retinal ganglion cell loss.
- Previous research indicates that patients with early glaucoma exhibit prolonged vection latencies.
Purpose of the Study:
- To investigate the relationship between the combined index of structure and function (CSFI) and vection responses in glaucoma patients.
- To determine if CSFI can explain the longer vection latencies observed in early glaucoma.
Main Methods:
- Two experiments were conducted using a back-projected screen and Oculus Rift system to elicit roll and circular vection.
- Vection latency, duration, and strength were measured, alongside subjective tilt and vection ratings.
- Measurements were compared with the CSFI, derived from visual field and optical coherence tomography data.
Main Results:
- Vection latency was significantly longer in glaucoma patients compared to controls in both experiments (P=0.02).
- The CSFI showed no significant correlation with vection latency, duration, or strength (P=0.06).
Conclusions:
- The study replicated findings of prolonged vection responses in glaucoma patients.
- The CSFI is not a reliable predictor of altered vection responses in glaucoma.
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