ROUB EXAM QUESTIONS WITH CORRECT
ANSWERS
If |your |biometry |instrument |has |one |psuedophakic |eye-type |setting. |What |is |the |only |IOL |
material |that |can |be |accurately |measured |? |- |CORRECT |ANSWER-Polymethyl |methacrylate |
(PMMA)
If |a |gain |setting |is |increased |in |order |to |obtain |a |100% |tall |retina |and |sclera |echo, |what |type |
of |cataract |is |being |evaluated |? |- |CORRECT |ANSWER-A |dense |cataract
What |transducer |frequency |is |generally |used |for |a |biometry |A-Scan |probe |? |- |CORRECT |
ANSWER-10 |MHz
What |is |the |velocity |of |a |biometer |that |only |uses |an |average |velocity |to |measure |the |entire |
axial |length |? |- |CORRECT |ANSWER-1550 |m/sec
What |is |one |of |the |most |important |features |of |a |biometer |? |- |CORRECT |ANSWER-The |display |
screen
What |are |the |velocity |settings |for |a |phakic |eye |? |- |CORRECT |ANSWER-(+) |Aqueous |: |1532 |m/s
(+) |Crystalline |Lens |: |1641 |m/s
(+) |Vitreous |: |1532 |m/s
What |should |the |examiner |do |to |reduce |the |presence |of |a |reverberation |echo |created |by |a |
dense |cataract |? |- |CORRECT |ANSWER-Reduce |the |gain
, What |is |the |term |for |the |electronic |calipers |that |measure |the |distance |between |two |or |more |
anatomic |interfaces |? |- |CORRECT |ANSWER-Gates
Of |the |following |settings |on |the |biometer |screen |(gain, |gates, |A-scan |probe |frequency, |eye |
type |and |screen |brightness), |which |cannot |be |changed |by |the |examiner |? |- |CORRECT |
ANSWER-A-Scan |probe |frequency
What |is |the |proper |sound |velocity |used |to |measure |the |distance |between |the |anterior |ans |
posterior |lens |interfaces |in |a |phakic |eye |? |- |CORRECT |ANSWER-1641 |m/s
when |performing |immersion |biometry, |which |gate |in |relation |to |the |initial |spike |represents |
the |cornea |? |- |CORRECT |ANSWER-Corneal |gate |is |to |the |right |of |the |initial |spike
What |is |the |possible |cause |for |a |biometry |instrument |to |indicate |an |unusually |short |
measurement |of |a |psuedophakic |eye |with |a |PMMA |implant |? |- |CORRECT |ANSWER-Multiple |
signal |of |the |echo |with |improper |identification |of |the |retina
What |biometer |setting |changes |the |degree |of |echo |amplification |? |- |CORRECT |ANSWER-Gain
What |is |the |term |for |the |relative |strength |or |amplitude |of |an |echo |displayed |on |a |biometer |? |-
|CORRECT |ANSWER-Reflectivity
When |measuring |an |eye |that |has |no |crystalline |lens, |the |instrument |should |be |set |on |what |
eye |type |? |- |CORRECT |ANSWER-Aphakic
What |is |the |term |for |the |"markers" |or |"cursors" |displayed |on |the |screen |of |a |biometry |
instrument |that |provide |electronic |measurements |of |distance |between |two |or |more |acoustic |
interfaces |? |- |CORRECT |ANSWER-Gates
ANSWERS
If |your |biometry |instrument |has |one |psuedophakic |eye-type |setting. |What |is |the |only |IOL |
material |that |can |be |accurately |measured |? |- |CORRECT |ANSWER-Polymethyl |methacrylate |
(PMMA)
If |a |gain |setting |is |increased |in |order |to |obtain |a |100% |tall |retina |and |sclera |echo, |what |type |
of |cataract |is |being |evaluated |? |- |CORRECT |ANSWER-A |dense |cataract
What |transducer |frequency |is |generally |used |for |a |biometry |A-Scan |probe |? |- |CORRECT |
ANSWER-10 |MHz
What |is |the |velocity |of |a |biometer |that |only |uses |an |average |velocity |to |measure |the |entire |
axial |length |? |- |CORRECT |ANSWER-1550 |m/sec
What |is |one |of |the |most |important |features |of |a |biometer |? |- |CORRECT |ANSWER-The |display |
screen
What |are |the |velocity |settings |for |a |phakic |eye |? |- |CORRECT |ANSWER-(+) |Aqueous |: |1532 |m/s
(+) |Crystalline |Lens |: |1641 |m/s
(+) |Vitreous |: |1532 |m/s
What |should |the |examiner |do |to |reduce |the |presence |of |a |reverberation |echo |created |by |a |
dense |cataract |? |- |CORRECT |ANSWER-Reduce |the |gain
, What |is |the |term |for |the |electronic |calipers |that |measure |the |distance |between |two |or |more |
anatomic |interfaces |? |- |CORRECT |ANSWER-Gates
Of |the |following |settings |on |the |biometer |screen |(gain, |gates, |A-scan |probe |frequency, |eye |
type |and |screen |brightness), |which |cannot |be |changed |by |the |examiner |? |- |CORRECT |
ANSWER-A-Scan |probe |frequency
What |is |the |proper |sound |velocity |used |to |measure |the |distance |between |the |anterior |ans |
posterior |lens |interfaces |in |a |phakic |eye |? |- |CORRECT |ANSWER-1641 |m/s
when |performing |immersion |biometry, |which |gate |in |relation |to |the |initial |spike |represents |
the |cornea |? |- |CORRECT |ANSWER-Corneal |gate |is |to |the |right |of |the |initial |spike
What |is |the |possible |cause |for |a |biometry |instrument |to |indicate |an |unusually |short |
measurement |of |a |psuedophakic |eye |with |a |PMMA |implant |? |- |CORRECT |ANSWER-Multiple |
signal |of |the |echo |with |improper |identification |of |the |retina
What |biometer |setting |changes |the |degree |of |echo |amplification |? |- |CORRECT |ANSWER-Gain
What |is |the |term |for |the |relative |strength |or |amplitude |of |an |echo |displayed |on |a |biometer |? |-
|CORRECT |ANSWER-Reflectivity
When |measuring |an |eye |that |has |no |crystalline |lens, |the |instrument |should |be |set |on |what |
eye |type |? |- |CORRECT |ANSWER-Aphakic
What |is |the |term |for |the |"markers" |or |"cursors" |displayed |on |the |screen |of |a |biometry |
instrument |that |provide |electronic |measurements |of |distance |between |two |or |more |acoustic |
interfaces |? |- |CORRECT |ANSWER-Gates
