On the topic of eyes .... outside of the small world of our hobby, there are companies who make formidable glass eyes for taxidermists and bird/decoy carvers. I'm sure you can confirm that, Guy? A company in the USA called
Tohickon makes really all kinds of eyes, for mammals, birds, fish, etc. and also human eyes I believe; now, I'm not sure but it is possible they do them to scale, fe. 1/6, too..... Honestly, I wondered for a moment if Alex has used one of these here. Still, nothing wrong with that in case of this model (a make-up box)...
Anyway, Alex, if you haven't used the Tohickon eyes yet, better check them out; with all the large scale horror stuff you do they probably have got eyes that you could use in your models. The effect of museum quality glass eyes in large scale figures just has to be magnificent I would imagine...worth experimenting with.
Your ever constructive and positive,
Johan