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To compare lamina cribrosa (LC) and choroidal thicknesses using enhanced depth imaging optical coherence tomography (EDI‐OCT) in patients with Parkinson's disease (PD) and healthy controls.

A total number of 44 eyes of 22 patients with PD and 50 eyes of 25 healthy subjects were utilized in this institutional cross‐sectional study. After a complete ophthalmic examination, all eyes were imaged with OCT (RTVue‐100 version 5.1 Fourier‐domain optical coherence tomography; Optovue Inc., Fremont, CA, USA); LC and choroidal thickness were assessed.

The mean LC thicknesses were 209.4 ± 40.2 μm in patients with PD and 292.5 ± 33.7 μm in control subjects. There was a significant difference in the mean LC thickness between the groups (p < 0.0001). The choroidal thickness measurements of the PD group at the subfoveal region and 1.5 mm temporal and 1.5 mm nasal to the …