الفهرس 
IntroductionOnly 14 pages are availabe for public view
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Abstract
The high frequency and the multiplicity of blunt ocular trauma require not only good skill and experience of ophthalmologist, not only advanced surgical techniques but also modern accurate medical imaging technology.Blunt trauma forms a major part of ocular trauma, can produce marked sudden distortion of the globe resulting in more severe damage than may be clinically apparent.Serious eye trauma can result in a wide spectrum of tissue lesions of the globe, optic nerve and adnexa, ranging from relatively superficial to vision threatening lesions.Ophthalmic ultrasonography has became an indispensable diagnostic tool that has increased our ability to detect and differentiate many ocular traumatic lesions.Ultrasonography has revolutionized the management of the traumatized eye and also it provides the ophthalmologist with an instantaneous “look” into an eye with opaque ocular media as in corneal edema, traumatic hyphema, and cataract, vitreous hemorrhage which obscure the observer view and make diagnosis of eye pathology impossible.However, B-scan ultrasound can’t identify minute corneal pathology or minute iridociliary lesions. The introduction of high frequency ultrasound (50-100MHz) (Ultrasound Biomicroscopy) permits high resolution and microscopic like in vivo imaging of the anterior segment of the eye (4mm x 4 mm).Since Ultrasound Biomicroscopy images a cross section of angle structures without complication, it allows diagnosis of the minute hidden pathology as angle recession, cyclodialysis, iridodialysis, corneal blood staining, hyphaema and traumatic zonular abnormalities. Ultrasound Biomicroscopy may be, under certain conditions, of higher diagnostic value than gonioscopy.the present study was conducted in Mansoura University, ophthalmic center in the period from October 2013 to October 2014.Nighnty five eyes from outpatient clinic were examined. All of them were exposed to blunt ocular trauma.The aim was to compare clinical findings and ultrasonographic findings after exposure to blunt ocular trauma.After history taking, all of patients were subjected to full ophthalmic examination including visual acuity measurement, Slit-lamp examination, Gonioscopic and ultrasonic examination.Ultrasonic examination included:•B-scan Ultrasonography (Bi-dimensional US) (10MHz).•Ultrasound Biomicroscopy (UBM) (50-100MHz).In our study, the majority of the patients were males (68%), the commonest age of presentation was 10-20 years (31.6%) and stick was the commonest causative agent of blunt ocular injury (27.4%). The most common anterior segment affections were hyphema (43 cases in clinical examination, 45 cases by UBM), followed by iridodialysis (20 cases in clinical examination, 25 cases by UBM).The most common posterior segment involvement included vitreous hemorrhage (11 cases in clinical examination, 20 cases by B-scan US), followed by retinal detachment (17 cases in clinical examination, 20 cases by B-scan US).These results showed that B-Scan ultrasound and ultrasound biomicroscopy has high sensitivity and specificity in diagnosing traumatic ocular diseases.The results of this study support the combined use of B-Scan ultrasound and ultrasound biomicroscopy in evaluation of eye with blunt trauma.•Ultrasonography is a non invasive, well tolerated imaging modality by which an experienced echographer can provide reliable and detailed idea about ocular structures in patient with blunt ocular trauma.•When ophthalmoscopic evaluation is limited or not possible, echography is useful in evaluation and follow up of vitreous hemorrhage, choroidal detachment and in the localization of retinal tear( with or without detachment).Ultrasound Biomicroscopy is especially useful in assessment of anterior chamber, its angle, iridociliary unit and zonules• UBM should not only be considered as an additional examination technique in the evaluation of traumatic ocular pathologies but rather as the technique of choice.