https://pubmed.ncbi.nlm.nih.gov/34655378/
Assessment of eye drop instillation techniques among patients with primary open angle glaucoma in a Nigerian tertiary hospital
Olapeju A Sam-Oyerinde et al. Int Ophthalmol. 2021.
Approximately everyone does not wash their hands before the instillation. And ~30-40% touch the eye during inatillations. This was tested in Nigeria on glaucoma patients.
