Abstract
Background
To compare peripapillary retinal nerve fiber layer thickness (RNFLT) between patients with bipolar disorder and a control group by optical coherence tomography (OCT).
Methods
This prospective comparative case series included 60 eyes of 30 patients with bipolar disorder and 60 eyes of 30 age-matched healthy control subjects. Using OCT, peripapillary RNFLT of the 4 quadrants and the mean of them was compared between the two groups. Variables such as age of onset, duration, smoking, psychosis, mania and depression episodes in the case group and their relationships with RNFLT were evaluated by OCT.
Results
Mean RNFLT was 99 ± 8 in the case group, significantly less than the106 ± 8 mμ in the control group (p = 0.001). The inferior, superior, and nasal quadrants in the case and control groups showed significant difference in RNFLT (p < 0.001) (p = 0.040) (p = 0.005); however, the temporal quadrant was not reduced significantly, compared to the control value (p = 0.907). Moreover, the only variable showing significant relation with RNFLT was duration of bipolar disorder (p = 0.040).
Conclusion
Reduction of peripapilary RNFLT occurs in patients with bipolar disorder, and is related to the duration of disease. RNFLT can be a beneficial value for studying neurodegenerative changes over time towards detecting the severity and duration of disorder.
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The work was carried out by Ophthalmic Research Centre Shahid Beheshti Medical University.
Ali Mehraban is a psychiatrist, Psychiatry Research Center, Department of Psychiatry, Imam Hossein Medical Center, Shahid Beheshti University of Medical Sciences, and holds a MD.
Seyed Mehdi Samimi is an associate professor of Psychiatry, Psychiatry Research Center, Department of Psychiatry, Imam Hossein Medical Center, Shahid Beheshti University of Medical Sciences, and holds a MD.
Morteza Entezari is an associate professor of Ophthalmology, Ophthalmic Research Center, Department of Ophthalmology, Imam Hossein Medical Center, Shahid Beheshti University of Medical Sciences, and holds a MD.
Mohammad Hassan Seifi is an ophthalmologist, Ophthalmic Research Center, Department of Ophthalmology, Imam Hossein Medical Center, Shahid Beheshti University of Medical Sciences, and holds a MD.
Maryam Nazary is a neurologist, Department of Neurology, Imam Hossein Medical Center, Shahid Beheshti University of Medical Sciences, and holds a MD.
Mehdi Yaseri is a biostatistician, Department of Epidemiology and Biostatistics, Tehran University of Medical Sciences, and holds a PhD.
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Mehraban, A., Samimi, S.M., Entezari, M. et al. Peripapillary retinal nerve fiber layer thickness in bipolar disorder. Graefes Arch Clin Exp Ophthalmol 254, 365–371 (2016). https://doi.org/10.1007/s00417-015-2981-7
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DOI: https://doi.org/10.1007/s00417-015-2981-7