CERTIFIED OPHTHALMIC ASSISTANT QUESTIONS AND ANSWERS
How are systemic medications administered?CORRECT ANSWERS✓✓Orally, injection (subcutaneously or
intramuscularly) or intravenously
How should drops be properly instilled into a patient's eye?CORRECT ANSWERS✓✓Into the lower cul de
sac (lower fornix)
What does the term idiosyncrasy refer to with ophthalmic drugs?CORRECT ANSWERS✓✓A bizarre,
peculiar reaction to a drug that is not commonly seen, such as tremors, excitability or even collapse
What is the name of the instrument used to neutralize lenses?CORRECT ANSWERS✓✓Lensometer
(Lensmeter)
When recording a prism in a spectacle prescription, what does the abbreviation BO stand for?CORRECT
ANSWERS✓✓Base out
What is determined by focusing the thin lines in a manual lensometer?CORRECT ANSWERS✓✓The
sphere of the spectacle prescription
What is the first step in performing lensometry?CORRECT ANSWERS✓✓Focus the eyepiece
When PRK is being performed, time remaining in the procedure should be announced in increments of
______CORRECT ANSWERS✓✓10 seconds
Name the organism that is most destructive to the eye.CORRECT ANSWERS✓✓Pseudomonas Aeruginosa
What procedure using an Argon Laser is thought to destroy areas of ischemic retina?CORRECT
ANSWERS✓✓Panretinal photocoagulation or panretinal laser
What type of intraocular injection is made at the Pars plana site with a needle and syringe of
medication?CORRECT ANSWERS✓✓Intravitreal injection
,What are the parallel movements of the eyes from one gaze position to anotherCORRECT
ANSWERS✓✓Versions
What is the movement of one eye calledCORRECT ANSWERS✓✓Duction
Versions and ductions are tested by using ________ to test the six pairs of _______ muscles.CORRECT
ANSWERS✓✓Six Cardinal positions, yoke
The movement of the eye outward toward the temple is called _____CORRECT ANSWERS✓✓Abduction
What is the technique used to measure the radius of curvature of the anterior corneal surface?CORRECT
ANSWERS✓✓A-Scan Keratometry Length Measurements
Keratometry is performed with a device called a ______CORRECT ANSWERS✓✓Keratometer or
ophthalmometer
Give three examples in which a Keratometry measurement would be useful.CORRECT
ANSWERS✓✓Contact lens fitting, refractive surgery, intraocular lens calculations, keratoconus
Keratometry is measured in _____CORRECT ANSWERS✓✓Diopters
Measuring intraocular pressure is also called _____CORRECT ANSWERS✓✓Tonometry
The higher the intraocular pressure of an eye, the ____ the eyeCORRECT ANSWERS✓✓Harder
Applanation tonometry displaces less than ____ of aqueous.CORRECT ANSWERS✓✓0.5 microliters
When recording intraocular pressure, the reading on the Goldmann applanation tonometer scale should
be multiplied by ____.CORRECT ANSWERS✓✓10
,Because there are no rods or cones in the optic nerve head a____ blind spot is created in the normal
visual field.CORRECT ANSWERS✓✓Physiologic
A defect in the patient's superior temporal retina, will affect the patient's ____ field of vision.CORRECT
ANSWERS✓✓Inferior nasal
The two basic methods employed to map the field of vision are ____ and ____ perimetry.CORRECT
ANSWERS✓✓Kinetic, static
A localized area of reduced sensitivity in a visual field that is surrounded by an area of greater sensitivity
is termed a ____.CORRECT ANSWERS✓✓Scotoma
And unfocused eyepiece can lead to an error of ____.CORRECT ANSWERS✓✓1 diopter in the K reading
How many meridians are measured in keratometry?CORRECT ANSWERS✓✓2 meridians (usually 90°
apart)
The average K reading is ____.CORRECT ANSWERS✓✓43-44 diopters
Keratometry measures the____ of the anterior curvature of the cornea.CORRECT ANSWERS✓✓Central
3.3 mm
The diffusion of oxygen through a contact lens material is referred to as ____.CORRECT ANSWERS✓✓DK
value
True or False: The application and evaluation of a diagnostic lens on the eye is the best way to fit a
contact lensCORRECT ANSWERS✓✓True
Name the instrument used to determine the posterior surface radius of curvature of a rigid contact
lens.CORRECT ANSWERS✓✓Radiuscope and or Contacto Gauge
, Increased thirst, excessive urine, production, increased hunger and weight loss are characteristics of
which endocrine disease?CORRECT ANSWERS✓✓Diabetes insipidus
What finding can occur 6 to 8 hours after a metallic foreign body enters the cornea?CORRECT
ANSWERS✓✓Rust ring
Why are alkali burns more serious than acid burns on the cornea?CORRECT ANSWERS✓✓Alkali burns
penetrate deeper
Variability in the functions of levator and extraocular muscle is characteristic in which systemic
disease?CORRECT ANSWERS✓✓Myasthenia gravis
What is the name of the mucous membrane covering the interior sclera?CORRECT ANSWERS✓✓(Bulbar)
Conjunctiva
What type of glaucoma constitutes an ocular emergency?CORRECT ANSWERS✓✓Acute angle-closure
glaucoma
Protocols for pressure patching or shields require that adhesive tape must be applied from the ____ to
the ____.CORRECT ANSWERS✓✓Bridge of the nose, ear lobe
What is the minimum thickness of safety lenses?CORRECT ANSWERS✓✓3.0 mm
What is the name of the important screening process used in emergencies determine the patient's
ocular needs?CORRECT ANSWERS✓✓Triage
What is a hemorrhage confined to the anterior chamber termed?CORRECT ANSWERS✓✓Hyphema
____ drugs induce contractions of the iris sphincterCORRECT ANSWERS✓✓Miotic
How are systemic medications administered?CORRECT ANSWERS✓✓Orally, injection (subcutaneously or
intramuscularly) or intravenously
How should drops be properly instilled into a patient's eye?CORRECT ANSWERS✓✓Into the lower cul de
sac (lower fornix)
What does the term idiosyncrasy refer to with ophthalmic drugs?CORRECT ANSWERS✓✓A bizarre,
peculiar reaction to a drug that is not commonly seen, such as tremors, excitability or even collapse
What is the name of the instrument used to neutralize lenses?CORRECT ANSWERS✓✓Lensometer
(Lensmeter)
When recording a prism in a spectacle prescription, what does the abbreviation BO stand for?CORRECT
ANSWERS✓✓Base out
What is determined by focusing the thin lines in a manual lensometer?CORRECT ANSWERS✓✓The
sphere of the spectacle prescription
What is the first step in performing lensometry?CORRECT ANSWERS✓✓Focus the eyepiece
When PRK is being performed, time remaining in the procedure should be announced in increments of
______CORRECT ANSWERS✓✓10 seconds
Name the organism that is most destructive to the eye.CORRECT ANSWERS✓✓Pseudomonas Aeruginosa
What procedure using an Argon Laser is thought to destroy areas of ischemic retina?CORRECT
ANSWERS✓✓Panretinal photocoagulation or panretinal laser
What type of intraocular injection is made at the Pars plana site with a needle and syringe of
medication?CORRECT ANSWERS✓✓Intravitreal injection
,What are the parallel movements of the eyes from one gaze position to anotherCORRECT
ANSWERS✓✓Versions
What is the movement of one eye calledCORRECT ANSWERS✓✓Duction
Versions and ductions are tested by using ________ to test the six pairs of _______ muscles.CORRECT
ANSWERS✓✓Six Cardinal positions, yoke
The movement of the eye outward toward the temple is called _____CORRECT ANSWERS✓✓Abduction
What is the technique used to measure the radius of curvature of the anterior corneal surface?CORRECT
ANSWERS✓✓A-Scan Keratometry Length Measurements
Keratometry is performed with a device called a ______CORRECT ANSWERS✓✓Keratometer or
ophthalmometer
Give three examples in which a Keratometry measurement would be useful.CORRECT
ANSWERS✓✓Contact lens fitting, refractive surgery, intraocular lens calculations, keratoconus
Keratometry is measured in _____CORRECT ANSWERS✓✓Diopters
Measuring intraocular pressure is also called _____CORRECT ANSWERS✓✓Tonometry
The higher the intraocular pressure of an eye, the ____ the eyeCORRECT ANSWERS✓✓Harder
Applanation tonometry displaces less than ____ of aqueous.CORRECT ANSWERS✓✓0.5 microliters
When recording intraocular pressure, the reading on the Goldmann applanation tonometer scale should
be multiplied by ____.CORRECT ANSWERS✓✓10
,Because there are no rods or cones in the optic nerve head a____ blind spot is created in the normal
visual field.CORRECT ANSWERS✓✓Physiologic
A defect in the patient's superior temporal retina, will affect the patient's ____ field of vision.CORRECT
ANSWERS✓✓Inferior nasal
The two basic methods employed to map the field of vision are ____ and ____ perimetry.CORRECT
ANSWERS✓✓Kinetic, static
A localized area of reduced sensitivity in a visual field that is surrounded by an area of greater sensitivity
is termed a ____.CORRECT ANSWERS✓✓Scotoma
And unfocused eyepiece can lead to an error of ____.CORRECT ANSWERS✓✓1 diopter in the K reading
How many meridians are measured in keratometry?CORRECT ANSWERS✓✓2 meridians (usually 90°
apart)
The average K reading is ____.CORRECT ANSWERS✓✓43-44 diopters
Keratometry measures the____ of the anterior curvature of the cornea.CORRECT ANSWERS✓✓Central
3.3 mm
The diffusion of oxygen through a contact lens material is referred to as ____.CORRECT ANSWERS✓✓DK
value
True or False: The application and evaluation of a diagnostic lens on the eye is the best way to fit a
contact lensCORRECT ANSWERS✓✓True
Name the instrument used to determine the posterior surface radius of curvature of a rigid contact
lens.CORRECT ANSWERS✓✓Radiuscope and or Contacto Gauge
, Increased thirst, excessive urine, production, increased hunger and weight loss are characteristics of
which endocrine disease?CORRECT ANSWERS✓✓Diabetes insipidus
What finding can occur 6 to 8 hours after a metallic foreign body enters the cornea?CORRECT
ANSWERS✓✓Rust ring
Why are alkali burns more serious than acid burns on the cornea?CORRECT ANSWERS✓✓Alkali burns
penetrate deeper
Variability in the functions of levator and extraocular muscle is characteristic in which systemic
disease?CORRECT ANSWERS✓✓Myasthenia gravis
What is the name of the mucous membrane covering the interior sclera?CORRECT ANSWERS✓✓(Bulbar)
Conjunctiva
What type of glaucoma constitutes an ocular emergency?CORRECT ANSWERS✓✓Acute angle-closure
glaucoma
Protocols for pressure patching or shields require that adhesive tape must be applied from the ____ to
the ____.CORRECT ANSWERS✓✓Bridge of the nose, ear lobe
What is the minimum thickness of safety lenses?CORRECT ANSWERS✓✓3.0 mm
What is the name of the important screening process used in emergencies determine the patient's
ocular needs?CORRECT ANSWERS✓✓Triage
What is a hemorrhage confined to the anterior chamber termed?CORRECT ANSWERS✓✓Hyphema
____ drugs induce contractions of the iris sphincterCORRECT ANSWERS✓✓Miotic
