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Certified Ophthalmic Assistant (COA) Study Guide | Exam Review, Practice Questions & Prep

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Certified Ophthalmic Assistant (COA) Study Guide is a focused exam-preparation resource designed to help students and candidates review essential ophthalmic knowledge and prepare for the COA certification exam. Use this resource for active recall, self-assessment, targeted revision, and final exam preparation. It can help reinforce important concepts and highlight areas that may need additional review. What’s included: Certified Ophthalmic Assistant (COA) study material Key ophthalmic concepts and terminology Exam-focused review content Practice and knowledge-assessment material Targeted revision support Convenient resource for COA exam preparation

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Certified Ophthalmic Assistant (COA)
./ ./ ./




How./are./systemic./medications./administered?./-
./correct./answer./Orally,./injection./(subcutaneously./or./intramuscularly)./or./intravenou

sly



How./should./drops./be./properly./instilled./into./a./patient's./eye?./-
./correct./answer./Into./the./lower./cul./de./sac./(lower./fornix)




What./does./the./term./idiosyncrasy./refer./to./with./ophthalmic./drugs?./-
./correct./answer./A./bizarre,./peculiar./reaction./to./a./drug./that./is./not./commonly./seen,./s

uch./as./tremors,./excitability./or./even./collapse



What./is./the./name./of./the./instrument./used./to./neutralize./lenses?./-
./correct./answer./Lensometer./(Lensmeter)




When./recording./a./prism./in./a./spectacle./prescription,./what./does./the./abbreviation./BO
./stand./for?./-./correct./answer./Base./out




What./is./determined./by./focusing./the./thin./lines./in./a./manual./lensometer?./-
./correct./answer./The./sphere./of./the./spectacle./prescription




What./is./the./first./step./in./performing./lensometry?./-
./correct./answer./Focus./the./eyepiece

,When./PRK./is./being./performed,./time./remaining./in./the./procedure./should./be./announ
ced./in./increments./of./______./-./correct./answer./10./seconds



Name./the./organism./that./is./most./destructive./to./the./eye../-
./correct./answer./Pseudomonas./Aeruginosa




What./procedure./using./an./Argon./Laser./is./thought./to./destroy./areas./of./ischemic./retin
a?./-./correct./answer./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./answer./Intravitreal./injection



What./are./the./parallel./movements./of./the./eyes./from./one./gaze./position./to./another./-
./correct./answer./Versions




What./is./the./movement./of./one./eye./called./-./correct./answer./Duction



Versions./and./ductions./are./tested./by./using./________./to./test./the./six./pairs./of./______
_./muscles../-./correct./answer./Six./Cardinal./positions,./yoke



The./movement./of./the./eye./outward./toward./the./temple./is./called./_____./-
./correct./answer./Abduction




What./is./the./technique./used./to./measure./the./radius./of./curvature./of./the./anterior./corne
al./surface?./-./correct./answer./A-Scan./Keratometry./Length./Measurements

,Keratometry./is./performed./with./a./device./called./a./______./-
./correct./answer./Keratometer./or./ophthalmometer




Give./three./examples./in./which./a./Keratometry./measurement./would./be./useful../-
./correct./answer./Contact./lens./fitting,./refractive./surgery,./intraocular./lens./calculation

s,./keratoconus



Keratometry./is./measured./in./_____./-./correct./answer./Diopters



Measuring./intraocular./pressure./is./also./called./_____./-./correct./answer./Tonometry



The./higher./the./intraocular./pressure./of./an./eye,./the./____./the./eye./-
./correct./answer./Harder




Applanation./tonometry./displaces./less./than./____./of./aqueous../-
./correct./answer./0.5./microliters




When./recording./intraocular./pressure,./the./reading./on./the./Goldmann./applanation./ton
ometer./scale./should./be./multiplied./by./____../-./correct./answer./10



Because./there./are./no./rods./or./cones./in./the./optic./nerve./head./a____./blind./spot./is./crea
ted./in./the./normal./visual./field../-./correct./answer./Physiologic

, A./defect./in./the./patient's./superior./temporal./retina,./will./affect./the./patient's./____./field
./of./vision../-./correct./answer./Inferior./nasal




The./two./basic./methods./employed./to./map./the./field./of./vision./are./____./and./____./per
imetry../-./correct./answer./Kinetic,./static



A./localized./area./of./reduced./sensitivity./in./a./visual./field./that./is./surrounded./by./an./are
a./of./greater./sensitivity./is./termed./a./____../-./correct./answer./Scotoma



And./unfocused./eyepiece./can./lead./to./an./error./of./____../-
./correct./answer./1./diopter./in./the./K./reading




How./many./meridians./are./measured./in./keratometry?./-
./correct./answer./2./meridians./(usually./90°./apart)




The./average./K./reading./is./____../-./correct./answer./43-44./diopters



Keratometry./measures./the____./of./the./anterior./curvature./of./the./cornea../-
./correct./answer./Central./3.3./mm




The./diffusion./of./oxygen./through./a./contact./lens./material./is./referred./to./as./____../-
./correct./answer./DK./value




True./or./False:./The./application./and./evaluation./of./a./diagnostic./lens./on./the./eye./is./the.
/best./way./to./fit./a./contact./lens./-./correct./answer./True

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