The ultrasound eye or orbit may be needed in case of cataracts or other eye problems. In cataracts, it allows to measure the eye to determine the right power of a lens implant before cataract surgery. The other indications include bleeding into the clear gel (vitreous) that fills the back of the eye (vitreous haemorrhage), Cancer of the retina or other parts of the eye, Damaged tissue or injuries in the bony socket (orbit) that surrounds and protects the eye, Foreign bodies, Pulling away of the retina from the back of the eye (retinal detachment) or Swelling (inflammation).