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COA Study Guide Exam/260 Questions and Answers
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COA Study Guide Exam/260Questions and Answers
Name the nine components of the ophthalmic history. - -Chief complaint, present illness, past ocular history, ocular medications, general medical and surgical history, systemic medications, allergies, social history, and family history. -Why is it important to specifically ask a patient about the medications they are taking? - -Because certain medications may affect the eyes. -What is the proper response to a patient's request from the ophthalmic technician for medical advice or a diagnosis? - -Refer the patient to the ophthalmologist -What is the term used for the reason for the patient's visit? - -Chief complaint -What elements are important in social history taking? - -Smoking, alcohol, and drug use -Prior use of topical ocular pharmaceutical agents is part of a patient's ________. - -Past ocular history -Pertinent family history of a patient should include which relatives? - -
Parents, grandparents, and genetic siblings -A patient describing an experience of getting hives after taking sulfa drugs is providing information about __________. - -An allergic reaction -What is the term for the spasmodic, rhythmic dilating, and contracting pupillary movements during pupil function testing? - -Hippus -What is the name of the test used for detecting a relative afferent pupillary defect? - -Swinging flashlight test -Which muscle of the iris constricts in bright light? - -Sphincter -What is pupil dilation termed? - -Mydriasis -What is the term used when there is a difference in pupil size? - -Anisocoria -What is pupillometry? - -The measurement of pupillary diameters. -What is the name of the reflexive reaction that occurs when a light is directed into one pupil and the pupil of the opposite eye simultaneously reacts - -Consensual pupillary reaction -Calibration of the applanation tonometer should be checked approximately every _____ months. - -Two (or sooner with regular use) -When cleaning the goniolens, what is uses to rinse off the methycellulose? -
-Warm running water -When replacing a light bulb _____ can diminish its effectiveness and life. - -
Oil from fingers -Diagnostic lenses that contact the eye can be sterilized using? - -Ethylene Oxide gas -How should the removable glass slides inside the American Optical acuity projector be cleaned? - -Wipe with clean, soft lint-free towel or photographic lens paper -If dust accumulates on the mirror of the slit lamp, the technician may clean it by using what cleaning methods? - -A lint-free cloth, a lens brush, or a blast of air -Who should repair and maintain equipment such as a laser? - -A qualified service technician. -Which accessories are used to check the calibration of an ophthalmometer/keratometer? - -Three test balls made of steel also called "Lensco Meter" -What should be used to clean the accessible lenses of a phoropter? - -
Photographic lens cleaner and lens tissue -What size letters (optotypes) are typically used to calibrate visual acuity projectors? - -20/200 -What is the name of the instrument used to neutralize lenses? - -
Lensometer (Lensmeter) -When recording prism in a spectacle Rx, what does the abbreviation BO stand for? - -Base out -What is determined by focusing the thin lines in a manual lensometer? - -
The sphere of the spectacle Rx is determined by the thin lines. -What is the first step in performing lensometry? - -Focus the eyepiece. -If you cannot center the thick and thin lines in the lensometer, the lens has _______. - -Ground-in prism. -Each black ring seen in the lensometer eyepiece reticle measures how much prism? - -1 diopter for each ring -When performing lensometry, what is indicated if both thin and wide lines are in focus at the same time? - -The lens is spherical. -What is the technique used to measure the radius of curvature of the anterior corneal surface? - -A-Scan Keratometry Length Measurements -Keratometry is performed with a device called a ______. - -Keratometer or ophthalmometer -Give three examples in which a keratometry measurement would be useful.
- -Contact lens fitting, refractive surgery, intra ocular lens calculations, keratoconus -Keratometry is measured in _______. - -Diopters -An unfocused eyepiece can lead to an error of _______. - -1 diopter in the K reading -How many meridians are measured in keratometry? - -2 meridians (usually
90 degrees apart) -The average K reading is _____. - -43 to 44 diopters -Keratometry measures the _______ of the anterior curvature of the cornea. - -Central 3.3 mm -The diffusion of oxygen through a contact lens material is referred to as _______. - -DK value -True or false: The application and evaluation of diagnostic lens on the eye is the best way to fit a contact lens. - -True -Name the instrument used to determine the posterior surface radius of curvature of the rigid contact lens? - -Radiuscope and or Contacto Gauge -Name three reasons to dispense a therapeutic bandage contact lens. - -To protect cornea from eyelids and eyelashes, to promote corneal healing, to provide comfort, to stop wound leaks, to improve vision, or for drug delivery.
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