I found those eyechips among an old doll maker’s supplies some time ago. It’s pretty obvious they are the same design with Kenner Blythe eyechips, despite their varying sizes, but what’s more interesting is they come in the exact same 4 colours Blythe’s eyes came in. There has got to be some kind of connection, but what would that be?
(Blythe eyechip at the top, for reference)
Some 50s dress me dolls have similar sparkly eyes, but this exact eyechip design was originally seen in Little Miss No Name in 1965, and was then used again in 1972 in Blythe and Emerald Witch. Have you found any more dolls with those eyes?