Ultrasound gives a cross-sectional image of the eye, particularly the vitreous and retina when they cannot be seen because of a poor view into the eye. This may be needed in patients with cloudiness of the cornea, dense cataract and vitreous haemorrhage to check that the retina is ok.
The test is painless and also quite quick. A probe, with some gel on its end, is placed on your closed eyelids and Dr Chauhan will ask you to move your eyes around underneath. Still images will be printed for your records, but the test is often interpreted best whist the eye is moving.
It can also be used to measure the thickness of a choroidal naevus.