Practical Aspects of Ophthalmic Ultrasound' in Ibadan

The unique position of the eye as a superficial, easily accessible organ makes it readily available for inspection. However, in certain circumstances, particularly where there is cataract formation, the posterior segment is obscured from view using the ophthalmoscope. In addition to intraocular lesions, most extra-ocular lesions are not accessible for study and assessment by the ophthalmologist. Ultrasound offers a unique opportunity to inspect the lens, the posterior segment, the wall of the eye and also the extra-ocular areas to determine the nature, position, site and size of palpable and unseen pathology. In situations where faci lities exist, ultrasound is usually a preliminary test to be backed up by CT and MRI scans. The absence of MR1 and the scarcity of CT in Nigeria and other developing countries means that ultrasound is the final diagnostic tool before intervention in most patients.