Short commentary proposing that integrating olfactory training (including essential oils) with visual rehabilitation could exploit olfactory–visual neuroplasticity to improve sensory function after COVID-19 and in conditions mentioned such as Parkinson's.
Low direct Parkinson's therapeutic discovery value because it lacks mechanistic, biomarker, or intervention detail, but it flags a non-pharmacological neurorehabilitation concept that could inform quality-of-life and symptomatic care studies.