B-scan ultrasonography produces a two-dimensional cross-sectional view of the eye and orbit. It is used to examine conditions where the media is hazy like corneal opacities or dense cataracts. It can also be used to evaluate lesions like tumors even when the media is clear. The B-scan involves a transducer that transmits sound pulses and receives echoes to create images. It can position probes longitudinally or transversely and evaluate both the anterior and posterior segments of the eye. Example images shown include vitreous opacities, retinal detachments, choroidal detachments, and more.

1. B SCAN OF EYE
B SCAN

2. WHAT IS B SCAN
B-scan ultrasonography, or B-scan,
is a diagnostic test used in optometry
and ophthalmology to produce a two-
dimensional, cross-sectional view of
the eye and the orbit. It is otherwise
called brightness scan

3. INDICATIONS FOR EXAMINATION IN WHICH MEDIA IS HAZY
● lid problems
● keratoprosthesis,
● corneal opacities (eg, scars, severe edema),
● hyphema, hypopyon,
● miosis, pupillary membranes,
● dense cataracts,
● vitreous opacities (eg, hemorrhage, inflammatory debris).

4. CONDITION IN WHICH IT IS CARRIED OUT DESPITE CLEAR VIEW
iris or ciliary body lesions
ruling out ciliary body detachments
differentiating intraocular tumors,
serous versus hemorrhagic choroidal detachments,
rhegmatogenous versus exudative retinal detachments,
disc drusen versus papilledema.

5. Ultrasound Principles and Physics

6. Pulsed-echo
system
Transducer
Amplifier
Display monitor
COMPONENTS OF B SCAN

7. PROBE POSITIONING
Transverse probe
positions
Transverse scan of a choroidal melanoma. This is a lateral slice through the lesion centered at the
5:00 position left eye, with 3 clock hours represented both above (2:00, 3:00, and 4:00 positions,
respectively, from the top) and below (6:00, 7:00, and 8:00 positions) the lesion.

8. Longitudinal probe positions
Longitudinal scan of the same choroidal melanoma. This is a radial slice through the lesion, with 1 clock hour (in this case, the 5:00
position) being represented from the optic nerve and posterior pole (at the bottom of the right side) outward to the anterior meridian

9. ANTERIOR SEGMENT EVALUATION .
●
Immersion technique
●
Waterbath technique
Within the last five years, the development of high resolution (50-100 Mhz)
Probes have increased our ability toevaluate the anterior chamber

10. Set of scleral shells for immersion/waterbath

11. ASTEROID HYALOSIS( FIG A. & B.)
VITREOUS HAEMORRHAGE
A
B
C

12. VITREOUS OPACITY

15. Clotted Vitreous Haemorrhage
Layered Vitreous Haemorrhage

16. Comparison of PVD and Retinal
Detachment

17. Vitreoschisis Persistent Hyperplastic Primary Vitreous

19. Total Retinal Detachment(open Funnel)

21. Retinopathy of prematurity (stage 5)
With retinal detachment

22. Retinal pigment epithelium detachment

23. Sub retinal Haemorrhage

26. CHOROIDAL DETACHMENT

28. Cysticercosis with Retinal
Detachment

29. Coloboma

30. Subluxated IOL

31. SCLERITIS