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.
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
