Certified Ophthalmic Assistant: Chapter 17,
Tonometry Exam | Questions with 100%
Correct Answers | Verified | Latest Update
2026
Save
Terms in this set (66)
When cleaning the applanation b) The moveable arm that holds the biprism
tonometer, one must be careful can be bent if care is not taken.
not to:
a) remove the biprism
b) bend the pressure-sensitive
arm
c) turn the adjustment knob
d) cause scleral rigidity
The applanation tonometer unit c) Gently wiping with damp cloth and mild
itself may be cleaned by: soap. This recommendation comes from the
a) immersing in 3% hydrogen manufacturer." It is never a good idea to spray
peroxide cleaner directly onto an instrument.
b) spraying and wiping with
electronics cleaner
c) gently wiping with damp cloth
and mild soap
d) spraying with disinfectant
,The tonometer tip should be d) Technically, cleaning removes soil and debris
cleaned: and some germs. Disinfecting is the removal of
a) prior to being sterilized all or most germs except bacterial spores
b) prior to being autoclaved (which are killed by sterilization). External
c) prior to being boiled debris is removed first (or at the same time) in
d) prior to being disinfected order to allow all instrument surfaces to come
into contact with the disinfectant. Clean ->
Disinfect -> Sterilize
The tonometer tip should be d) Between each patient. Because the
disinfected: tonometer tip contacts the cornea and tear
a) morning and night film, it must be disinfected (or a fresh,
b) first thing each day disinfected tip inserted) between each patient.
c) every 10 minutes
d) between each patient
To best disinfect the tonometer c) A 10-minute soak of bleach (1:10 dilution) or
tip, one should: hydrogen peroxide is the best disinfection
a) wipe it with a moist tissue method. A moist tissue will not disinfect, nor
b) swipe it with an alcohol wipe will a quick "swipe" with alcohol (although some
c) put it in a 10-minute soak in 3% references suggest a 10-second wipe as
hydrogen peroxide acceptable). The autoclave will melt the
d) place it in the autoclave for 15 tonometer tip.
minutes
With regular use, soaking the b) Will cause the numbers to fade. Repeated
tonometer tip in alcohol: exposure to alcohol can cause the numbers
a) will not affect it and lines on the side of the tonometer tip to
b) will cause the numbers to fade fade and disappear.
c) will cause etching on the face
d) will cause the plastic to soften
, Failure to properly rinse the a) Corneal chemical burn. Alcohol and
tonometer tip after disinfecting hydrogen peroxide can cause marked
and prior to using it could result discomfort, so the tip should be rinsed well
in: and dried before using.
a) corneal chemical burn
b) inaccurate readings
c) etching of the tip's surface
d) clouding of the mires
Check calibration on the c) A calibration bar is placed in a special
Goldmann applanation tonometer attachable holder when calibrating an
by: applanation tonometer. If the calibration is not
a) placing the tip on a test block accurate, the instrument must be returned to
b) measuring an eye of known the manufacturer.
pressure
c) use of a calibration bar
d) returning it to the manufacturer
When calibrating the Goldman a) No more than +0.50 from the tested position.
applanation tonometer at the 2 Movement of the tonometer arm should occur
setting, the tonometer head within 0.50 of the drum setting of 2. If you must
should move: turn the drum more than 0.50 before the arm
a) no more than +0.50 from the will move, this indicates that the instrument is
tested position not accurate. Thus, when you are calibrating at
b) 1.0 from the tested position 2, the arm should "rock" between the 1.95 and
c) freely in every position 2.05 reading on the drum.
d) not at all
Tonometry Exam | Questions with 100%
Correct Answers | Verified | Latest Update
2026
Save
Terms in this set (66)
When cleaning the applanation b) The moveable arm that holds the biprism
tonometer, one must be careful can be bent if care is not taken.
not to:
a) remove the biprism
b) bend the pressure-sensitive
arm
c) turn the adjustment knob
d) cause scleral rigidity
The applanation tonometer unit c) Gently wiping with damp cloth and mild
itself may be cleaned by: soap. This recommendation comes from the
a) immersing in 3% hydrogen manufacturer." It is never a good idea to spray
peroxide cleaner directly onto an instrument.
b) spraying and wiping with
electronics cleaner
c) gently wiping with damp cloth
and mild soap
d) spraying with disinfectant
,The tonometer tip should be d) Technically, cleaning removes soil and debris
cleaned: and some germs. Disinfecting is the removal of
a) prior to being sterilized all or most germs except bacterial spores
b) prior to being autoclaved (which are killed by sterilization). External
c) prior to being boiled debris is removed first (or at the same time) in
d) prior to being disinfected order to allow all instrument surfaces to come
into contact with the disinfectant. Clean ->
Disinfect -> Sterilize
The tonometer tip should be d) Between each patient. Because the
disinfected: tonometer tip contacts the cornea and tear
a) morning and night film, it must be disinfected (or a fresh,
b) first thing each day disinfected tip inserted) between each patient.
c) every 10 minutes
d) between each patient
To best disinfect the tonometer c) A 10-minute soak of bleach (1:10 dilution) or
tip, one should: hydrogen peroxide is the best disinfection
a) wipe it with a moist tissue method. A moist tissue will not disinfect, nor
b) swipe it with an alcohol wipe will a quick "swipe" with alcohol (although some
c) put it in a 10-minute soak in 3% references suggest a 10-second wipe as
hydrogen peroxide acceptable). The autoclave will melt the
d) place it in the autoclave for 15 tonometer tip.
minutes
With regular use, soaking the b) Will cause the numbers to fade. Repeated
tonometer tip in alcohol: exposure to alcohol can cause the numbers
a) will not affect it and lines on the side of the tonometer tip to
b) will cause the numbers to fade fade and disappear.
c) will cause etching on the face
d) will cause the plastic to soften
, Failure to properly rinse the a) Corneal chemical burn. Alcohol and
tonometer tip after disinfecting hydrogen peroxide can cause marked
and prior to using it could result discomfort, so the tip should be rinsed well
in: and dried before using.
a) corneal chemical burn
b) inaccurate readings
c) etching of the tip's surface
d) clouding of the mires
Check calibration on the c) A calibration bar is placed in a special
Goldmann applanation tonometer attachable holder when calibrating an
by: applanation tonometer. If the calibration is not
a) placing the tip on a test block accurate, the instrument must be returned to
b) measuring an eye of known the manufacturer.
pressure
c) use of a calibration bar
d) returning it to the manufacturer
When calibrating the Goldman a) No more than +0.50 from the tested position.
applanation tonometer at the 2 Movement of the tonometer arm should occur
setting, the tonometer head within 0.50 of the drum setting of 2. If you must
should move: turn the drum more than 0.50 before the arm
a) no more than +0.50 from the will move, this indicates that the instrument is
tested position not accurate. Thus, when you are calibrating at
b) 1.0 from the tested position 2, the arm should "rock" between the 1.95 and
c) freely in every position 2.05 reading on the drum.
d) not at all
