Gu S, Li Z, Zhang Y, et al. - Researchers conducted the study for examining the microvascular and neural changes in primary pulmonary hypertension (PPH) patients compared with healthy controls. Forty-four eyes of 22 PPH patients were involved and 44 eyes of 22 healthy participants were enrolled as controls. According to this observational clinical cohort study, optical coherence tomography angiography can detect changes in the capillary density and thickness of the retina and optic nerve head in PPH patients. The macular-associated vessel density, optic disk–associated capillary density, retinal nerve fiber layer, ganglion cell complex, focal loss volume, and global loss volume can all be useful indicators for detecting microvascular and neural impairments in PPH patients.