This has been applied to a congenital enlargement of the eyes from
internal distension in children. The cases in lambs and foals quoted in
the last article were evidently of this nature. They are charged on
intraocular pressure acting on the delicate tissues of the embryo or
unborn animal. There is not necessarily cupping of the optic disc so
that persistent tension after birth cannot be insisted on.
Cases occurring in older animals, may be forms of secondary glaucoma
though classed under hydrophthalmos by Mayer and others.
_Treatment_ when demanded is along the same lines as in glaucoma.