What was the pairing? A few of the first Mack Snow Funky Jungles I hatched had solid eyes that faded over time, except one which kept 'snake eyes' into adulthood. The parents were not Eclipse or het Eclipse, but mom was a 'snake eyed' Blizzard. I'm referring to the trait seen in Blizzards in which inheritance is not understood. At the time I believed the Mack Snow had something to do with 'unlocking' it. It could also have something to do with the 'line' mine came from as every Mack Snow Blizzard hatched from it has solid eyes yet the regular Blizzards were variable.
Depending on the geckos you paired, this may have been an irrelevant post...