The phrase "small eyes" is an idiomatic expression that means to be suspicious or have a mistrustful attitude towards someone or something. It can also imply being unimpressed, disinterested, or lacking in enthusiasm for something.
Sentences with «small eyes»
Most organisms are not faced with such big predators, so they don't need to see far away and thus get by with smaller eyes. (sciencemag.org)
I haven't really tried the bold liner yet, mainly because I have very small eyes and they look smaller with bold liners. (thefashionfolks.com)
All of this is fitting for the genre so isn't over blown but still not for small eyes and ears. (thatvideogameblog.com)