Yes, marble eye is a recessive trait, as is eclipse.
There's no way to know for sure, but one thing that stands out to me is that I don't see the other eclipse markers such as white nose and more washed out coloring. Those hatchlings especially don't look eclipse to me, but I recently had an eclipse hatch out that doesn't look like an eclipse pattern and coloring-wise, so there is probably no way to tell for sure unless you can find out from the person you got it from.
Sunglows are not normally eclipse or marble eyed, but they can be, and yours certainly appears to have something going on in that area.
Maybe someone with more experience with marble eyes can be of assistance.
By those pictures it looks like you took them in fairly dim light and the pupil is dilated. If you could get a picture in natural sunlight it would be better.
Flash generally makes a photo worse. Take the gecko outside and try to get a clear picture of the eye. Looks like a standard Tremper albino eye to me, but a photo of an undilated pupil will clear it up.
I was looking at the pics on my phone, but making the pictures a bit bigger they do look like something may be going on there. That being said, the pupils are of coarse dilated to some degree due to the low light conditions they were photographed in. It could go either way in my opinion, but some higher quality pictures would definitely get stronger answers.
In the picture of the hatchlings, is the gecko you're talking about one of those? Is it by any chance the one farthest to the right behind the hide? I ask because that one seems to have a white nose and the eyes look like partial snake eyes to me.
Anyway could it be a case of the gecko changing its eyes? I remember when young it looks like a eclipse maybe now it's losin the full black eyes? Maybe that's why look like marble? Is there such cases?
Looks like eclipse. The gecko is showing the "white socks" that is associated with the eclipse gene. As the gecko ages, the white nose usually disappears.