"This is probably what causes the expansion of the choroid, the vascular layer that nourishes the retina." According to the researchers, the expansion of the choroid during weightlessness could ...

It also produces the clear liquid (aqueous humor) that fills in the gap between your iris and cornea Choroid layer, tissue between the white outer layer of the eye and the retina that has blood ...

which likely causes the choroid, the vascular layer nourishing the retina, to expand. Weightlessness may lead to lasting eye changes due to mechanical shock The researchers suggest that the ...