I just searched MSM drops and glaucoma and found this very disconcerting report of acute glaucoma caused by oral MSM supplement. It explains that sulfa drugs are known to potentially cause acute angle closure, and MSM is sulfur based.
https://pubmed.ncbi.nlm.nih.gov/24240884/This also makes me wonder if MSM or DMSO are safe for me in any form. Both my mother and maternal grandmother had severe reactions to Bactrim (sulfa drug). Makes me believe we have some genetic issues with sulfur, but I never had the 23 and me done.