UBM Ultrasound Biomicroscopy

2. UBMUltrasound Biomicroscopy

3. Ultrasound biomicroscopy is a new imaging technique that uses high frequency ultrasound to produce images of the eye at near microscopic resolution

4. Basic of ultrasound biomicroscopy • Is based on 40 to 100 MHZ transduceres incorporated into a B- mode clinical scanner • Image resolution is approximately 50 μm • Reduced depth of penetration to approximately 5 mm

6. Quantitative studies includes Simple measurements methods such as a) Distance b) Angle measurement

7. Measurement of the AC depth

8. Measurement of AC angle

9. Qualitative analysis include : 1) Pathophysiology of anterior segment disorders 2) Mechanism of appositional angle closure

10. The cornea • Glaucoma • Tumors • IOLs • Ocular adnexa • The sclera • Trauma

12. CORNEA

13. CORNEA: • Internal corneal details • the depth of abnormalities

19. Penetrating keratoplasty

22. GLAUCOMA

23. PUPILLARY BLOCK

24. effect of illumination on angle configuration

25. LASER IRIDOTOMY

26. Plateau iris: • Anatomically anterior position of the ciliaryprocesses • Large ciliary process • Medium depth of AC • Slightly convex of iris surface

27. PLATEAU IRIS

28. PERIPHERAL IRIDOPLASTY

29. MALIGNANT GLAUCOMA: • Shallow supraciliarydetachmen • Anterior rotation of ciliary body • Aqueous humor is secreted posterior to the lens

30. malignantglaucoma

31. Reverse pupillary block (pigmentary glaucoma) • Concave configuration of midperipheral iris • Large iris • Posteriorly insertion of iris

32. PIGMENTARY GLAUCOMA

33. CYSTIC ANGLE CLOSURE

34. UGH SYNDROME

35. Anterior synechiae

37. INTRAOCULAR TUMORS

38. Tumors: • Iris tumors, ciliary body tumors and anterior choroidal tumors can be imaged • Borders of the tumor are usually detectable by the change in reflectivity from surrounding structures

39. CILIARY BODY TUMOR

40. Extra-scleral extension

41. CHOROIDAL TUMORS

42. IRIDO-CILIARY CYST

44. INTRAOCULAR LENSES

47. WOUND LEAKS

49. OCULAR ADNEXA

50. CONJUNCTIVAL MELANOMA