What's the plural form of xeropthalmia? Here's the word you're looking for.
Answer
The noun xeropthalmia can be countable or uncountable.
In more general, commonly used, contexts, the plural form will also be xeropthalmia.
However, in more specific contexts, the plural form can also be xeropthalmias e.g. in reference to various types of xeropthalmias
or a collection of xeropthalmias.