CDOS Practice Quiz
1. What condition can be im- Angle Recession
aged with UBM and is de-
scribed as a blunting or
rounding of the angle?
2. What is a disadvantage to 20 Resolution is much lower than UBM
MHz B-Scan over UBM?
3. What is the BEST description Highly mobile
of the movement of a PVD on
B-Scan?
4. What is the name of the con- Staphyoma
dition that is described as an
outpouching of the posteri-
or aspect of the globe on
B-Scan?
5. What property of silicone oil Velocity
is responsible for the arte-
factually large images with
B-Scan?
6. What structure imaged with IOL haptic
UBM looks like a tiny torna-
do?
7. When performing a UBM for Cysts are highly likely in the other eye id there is more than 1 in
suspected iridociliary cysts in the study eye
the study eye, why would you
scan both eyes?
8. Thyroid eye disease can be detected and followed
, CDOS Practice Quiz
What statement is
TRUE regarding standard-
ized A-Scan?
9. Ringing artefacts along the Fluid around the optic nerve
optic nerve shadow are sug-
gestive of:
10. Which statement about Differentiating between vitreous hemorrhage and inflammation
B-Scan is TRUE? is not possible without a history
11. On a routine UBM exam you IOL Haptic
note an area of reverbera-
tion echoes near the sulcus
that look like a small tornado.
What is a possible explana-
tion?
12. What examination protocol Zonules Exam
would you follow if a pa-
tient was referred because
of a history of trauma and a
cataract?
13. What examination protocol Angles Exam
would you follow if a patient
was referred for narrow an-
gle glaucoma?
14. What examination protocol Iris lesion Exam
would you follow if a patient
was referred for a pigmented
iris lesion?
, CDOS Practice Quiz
15. What examination protocol Iridociliary cyst Exam
would you follow if a patient
was referred for an elevat-
ed area noted on slit lamp
exam?
16. On a routine UBM exam Angle Recession
you note the angle appears
rounded from 4oc-8oc. What
is a possible explanation?
17. Sound Velocities: Air/Gas: 340 m/s
Oil= 980 m/s
Water= 1480 m/s
Aqueous= 1532 m/s
Vitreous= 1532 m/s
Soft Tissue= 1550 m/s
Cornea= 1641 m/s
Lens (acyrilic/PMMA)= 2718 m/s
Bone= 3500 m/s
18. It is generally best to per- On an open globe
form a B-Scan exam directly
on the globe. When is it rec-
ommended to NOT go on the
globe but through the lids?
19. What can B-Scan help you de- Location and shape
termine about a lesion in the
eye?
20. What is the frequency of 10 MHz
standard B-Scan probes de-
1. What condition can be im- Angle Recession
aged with UBM and is de-
scribed as a blunting or
rounding of the angle?
2. What is a disadvantage to 20 Resolution is much lower than UBM
MHz B-Scan over UBM?
3. What is the BEST description Highly mobile
of the movement of a PVD on
B-Scan?
4. What is the name of the con- Staphyoma
dition that is described as an
outpouching of the posteri-
or aspect of the globe on
B-Scan?
5. What property of silicone oil Velocity
is responsible for the arte-
factually large images with
B-Scan?
6. What structure imaged with IOL haptic
UBM looks like a tiny torna-
do?
7. When performing a UBM for Cysts are highly likely in the other eye id there is more than 1 in
suspected iridociliary cysts in the study eye
the study eye, why would you
scan both eyes?
8. Thyroid eye disease can be detected and followed
, CDOS Practice Quiz
What statement is
TRUE regarding standard-
ized A-Scan?
9. Ringing artefacts along the Fluid around the optic nerve
optic nerve shadow are sug-
gestive of:
10. Which statement about Differentiating between vitreous hemorrhage and inflammation
B-Scan is TRUE? is not possible without a history
11. On a routine UBM exam you IOL Haptic
note an area of reverbera-
tion echoes near the sulcus
that look like a small tornado.
What is a possible explana-
tion?
12. What examination protocol Zonules Exam
would you follow if a pa-
tient was referred because
of a history of trauma and a
cataract?
13. What examination protocol Angles Exam
would you follow if a patient
was referred for narrow an-
gle glaucoma?
14. What examination protocol Iris lesion Exam
would you follow if a patient
was referred for a pigmented
iris lesion?
, CDOS Practice Quiz
15. What examination protocol Iridociliary cyst Exam
would you follow if a patient
was referred for an elevat-
ed area noted on slit lamp
exam?
16. On a routine UBM exam Angle Recession
you note the angle appears
rounded from 4oc-8oc. What
is a possible explanation?
17. Sound Velocities: Air/Gas: 340 m/s
Oil= 980 m/s
Water= 1480 m/s
Aqueous= 1532 m/s
Vitreous= 1532 m/s
Soft Tissue= 1550 m/s
Cornea= 1641 m/s
Lens (acyrilic/PMMA)= 2718 m/s
Bone= 3500 m/s
18. It is generally best to per- On an open globe
form a B-Scan exam directly
on the globe. When is it rec-
ommended to NOT go on the
globe but through the lids?
19. What can B-Scan help you de- Location and shape
termine about a lesion in the
eye?
20. What is the frequency of 10 MHz
standard B-Scan probes de-
