COA Flashcards
What does the abbreviation IJCAHPO stand for?
International Joint Commission on Allied Health Personnel in Ophthalmology
What responsibility routinely falls to the ophthalmic medical assistant?
performing certain diagnostic tests
What disease is associated with increased pressure inside the eye?
glaucoma
What eye care professional routinely fills prescriptions for eyeglasses?
optician
What does an orthoptist do?
evaluates strabismus
What instrument does an ophthalmologist use to examine the retina and optic nerve?
ophthalmoscope
What eye care professional would fit a patient with a prosthetic eye?
ocularist
What is the first IJCAHPO level of certification?
certified ophthalmic assistant
What is the primary function of the medial rectus muscle?
rotates the eye inward toward the nose
In what order is visual information from the retina transmitted to the visual cortex?
bipolar cells to ganglion cells to lateral geniculate body
Which part of the eye provides two-thirds of the eye’s focusing power?
cornea
The contraction of what muscle(s) affects globe rotation (incyclotorsion and excyclotorsion)?
superior oblique, inferior oblique, superior rectus, inferior rectus
What membrane lines the inner eyelid?
palpebral conjunctiva
What structure separates an internal hordeolum (chalazion) from an external hordeolum (stye)?
tarsal plate
The contraction of what muscle(s) results in enlargement of the pupil?
dilator
What structure is responsible for secreting the aqueous humor?
ciliary body
What is the process where the lens changes shape to allow an individual to focus on a near target?
accommodation
What kind of vision loss is associated with injury or degeneration of the macula?
detailed central vision
The crystalline lens regularly comes into contact with what fluids and tissues?
iris, zonules, aqueous humor, vitreous
What cells and glands of the eye and adnexa contribute to tear production?
goblet cells, meibomian glands, lacrimal gland
What is the primary function of the iris sphincter and dilator muscles?
to change the pupil size to control the amount of light entering the eye
What is amblyopia?
poor vision in an eye secondary to visual deprivation in the first decade of life
What is diplopia?
double vision
What is the defining feature of wet age-related macular degeneration (AMD) in comparison to dry AMD?
the presence of aberrant blood vessels leaking fluid in the central retina
In what condition do the orbital contents swell, pushing the eyeball forward?
exophthalmos (proptosis)
What differentiates pterygia from pingueculae?
Pterygia extend onto the surface of the cornea.
Primary open-angle glaucoma results in damage to what part of the eye?
optic nerve
What is the term for the inward deviation of the eye that occurs only when 1 eye is covered?
esophoria
An embolic retinal artery occlusion due to atherosclerosis is best classified as what type of process?
ischemic
What is the term for an abnormal physical change that a physician observes while examining a patient?
sign
What is the cause of presbyopia?
progressive hardening of the crystalline lens
What is a chalazion?
a lump that develops after inflammation and infection
What term best describes pooling of white blood cells at the bottom of the anterior chamber in the setting of an infectious or inflammatory process?
hypopyon
What sign or symptom most strongly suggests the presence of a retinal detachment rather than a posterior vitreous detachment?
a new, unilateral peripheral defect on confrontational visual fields
What term describes bilateral, elevated optic nerves due to increased intracranial pressure?
papilledema
What retinal infection typically occurs in patients with acquired immunodeficiency syndrome (AIDS) who have CD4 counts less than 50?
cytomegalovirus retinitis
What are the common ocular manifestations of myasthenia gravis?
ptosis, diplopia
What type of herpes simplex virus usually produces genital infections?
type 2
What is the common ocular manifestation of Sjögren syndrome?
keratoconjunctivitis sicca
What is a cancer that spreads to other parts of the body called?
metastatic
The eyes are considered part of what body system?
nervous
What autoimmune condition causes selective muscle weakness by interfering with proper nerve transmission in skeletal muscles?
myasthenia gravis
What is a waste product of metabolism in the body?
carbon dioxide
What is a common eye disorder associated with multiple sclerosis?
optic neuritis
What is the most common cause of proptosis in an adult?
thyroid eye disease
What is the characteristic feature of proliferative diabetic retinopathy?
proliferation of blood vessels
What is the correct transposition of the plus-cylinder prescription +1.00 +3.00 x 90 to its minus-cylinder form?
+4.00 –3.00 x 180
This figure shows the focal point of light rays in an eye that is which of the following?
myopic
This figure illustrates what property?
light-divergent property of a concave lens
What is the change in power called between the upper and lower segments of a bifocal lens?
add
What is the best technique for determining the total refractive power requirement of the eye?
Perform retinoscopy after administering cycloplegic eye drops, which block accommodation.
What is a toric cornea characteristic of?
astigmatism
What does a lens contain if the lensometer mires cannot be centered?
prism
The distance portion of an eyeglass lens is –2.00 D and the bifocal add is +3.00. What is the power of the lens through the bifocal segment?
+1.00 D
What type of substance permits the passage of light without significant disruption?
transparent
What type of lens best corrects hyperopia combined with astigmatism?
spherocylindrical
What is the first step in performing manual lensometry or keratometry?
Focus the eyepiece.
What is the power in diopters of a convex lens with a focal length of 0.50 m?
2.00 D
What antimicrobial drug is often compounded to increase potency?
vancomycin
What disease should be brought to the ophthalmologist’s attention in a patient using oral corticosteroids?
diabetes mellitus
The use of β-adrenergic blockers should be avoided in patients with what medical condition?
asthma
What is the primary function of topical corticosteroids?
to reduce swelling and scarring of the lids and anterior segment (anti-inflammatory and antiallergic agents)
What drug is most helpful when performing both a fundus examination and an objective refraction on a pediatric patient?
a cycloplegic
What type of injection is classified as a form of systemic drug delivery?
subcutaneous
What drug administration route provides the fastest drug delivery into the eye?
intracameral injection
How do miotics reduce intraocular pressure?
by contracting the ciliary body muscle and opening the outflow channels for aqueous humor
What is a common side effect of cycloplegics?
blurred vision
What 2 types of eyedrops could stimulate an attack of angle-closure glaucoma in patients with narrow anterior chamber angles?
mydriatics, cycloplegics
What ophthalmic dye is used primarily to diagnose herpes simplex keratitis?
fluorescein
What should the ophthalmic medical assistant do when instilling eyedrops?
Administer the medication directly into the conjunctival sac.
What is an adverse effect of topical prostaglandins?
eyelash growth
What class of medications, when taken by mouth, can cause tingling in the hands or feet, a metallic taste, and kidney stones?
carbonic anhydrase inhibitors
What is the primary purpose of standard precautions?
to reduce the opportunity for harmful microbes to flourish
What organism is a common contaminant in cosmetics, swimming pools, and hot tubs?
Pseudomonas aeruginosa
What is the best definition of sterilization?
the destruction of all microorganisms
If the ophthalmic medical assistant accidentally touches the sterile functional surface of a disposable instrument, what should be done with the instrument?
discard, no matter its cost
How should ophthalmic medical assistants deal with open cuts on their hands?
wear gloves to protect both patients and themselves
Who is most at risk for developing an ocular infection from the protozoan Acanthamoeba?
those who use homemade salt solutions to clean their contact lenses
What microbe is most likely to cause recurrent fever blisters?
herpes simplex virus
In an infection caused by MRSA, what is Staphylococcus aureus resistant to?
methicillin
What is the best option for disinfecting a tonometer tip?
a germicide
What bacterium is the most likely cause of blepharitis?
Staphylococcus aureus
Which procedure must be performed before pupillary dilation?
swinging-light test
What is the prism and alternate cover test used for?
to measure deviation in a misaligned eye
What step is a necessary part of the Schirmer test?
Remove the testing strip after 5 minutes.
How does the pinhole occluder determine whether a refractive error is the cause of below-normal visual acuity?
transmission of parallel rays
In a normal consensual reaction, when a light is directed into the pupil of 1 eye, what will the pupil of the other eye do?
constrict
How often should healthy, asymptomatic individuals between the ages of 40 and 64 have a comprehensive medical eye examination?
every 2 to 4 years
What part of the comprehensive medical eye examination evaluates visual system operation?
pupillary examination
A reading of 3 on the Goldmann tonometer dial indicates what intraocular pressure?
30 mm Hg
Corneal topography is useful for what measurement?
refractive error
When conducting the Amsler grid test, it is important to instruct the patient to perform what step?
Hold the card 12 to 14 inches away.
An afferent pupillary defect may be detected in patients with what condition?
optic nerve damage
Intraocular pressure is measured by flattening a small area of the central cornea using what procedure?
applanation tonometry
Near visual acuity measurements can be recorded in units from what system?
Jaeger
What is gonioscopy used to view?
structures of the anterior chamber angle