Variations in Globe Shape and Size

Phthisis Bulbi

Eyes with short axial lengths, as in microphthalmos, can also be displayed ultrasonically. Another condition of diagnostic importance revealed ultrasonically in phthisis bulbi, which is shrinkage of the globe. This shrinkage results in disorganization of intraocular tissue such that an amorphous mass of tissue is seen on the ultrasonogram.

Ultrasonography becomes very important in eyes with opaque media and especially low intraocular pressures, which is suggestive of phthisis bulbi. The ultrasonogram (see top left image) reveals one normal eye and another eye (see top right image) with no structural integrity to the globe. Surgical intervention in an eye such as this is not recommended.