COA Practice Exam Guide

COA Practice Exam While performing an automated visual field test, your patient has 2 or more false negatives. The best course of action is: a. Make sure the fellow eye is patched properly b. Let the patient take a break c. Remind the patient to look only at the fixation light d. Increase the stimulus size b. Let the patient take a break As you are instructing a patient how to take an automated visual field test, the patient states they cannot see the fixation light. Your next step would be: a. Tape the patient's upper eye lid b. Increase the stimulus size c. Change the fixation target to a diamond d. Remove the patch from the fellow eye c. Change the fixation target to a diamond Which of the following instructions are important to tell patients when performing an automated visual field test? a. Tell me when you see a light b. Push the button when you see very bright lights c. Do not blink during the test d. Push the button when you see any light e. Be sure not to miss any lights d. Push the button when you see any light A patient doesn't push the response button when a light is presented to him during an automated visual field test. A light is again presented to the patient in the same point of the visual field only this time it's a brighter light. This is an example of: a. Kinetic VFT b. Threshold VFT c. False negatives d. Fixation loss b. Threshold VFT A patient responds to light that is presented with a visual field machine has already determined his Blindspot is. This is an example of: a. A false negative b. Kinetic VFT c. Threshold VFT d. A fixation loss d. A fixation loss A patient who is performing an automated visual field test has multiple fixation masses and false positives. This is likely due to a. Anxiety b. Fatigue c. Dense visual field defect d. A lens rim artifact a. Anxiety If an automated visual field machine cannot locate the patients Blindspot the best course of action is to a. Repeat the "blind spot check" b. Make sure the fellow eye is properly patched c. Reinstruct the PT d. All of the above d. All of the above When performing a kinetic visual field testing it's important to a. Move the stimulus quickly b. Move the stimulus from a non-seeing area to a seeing area c. Instruct the patient to be certain the stimulus is present before responding d. Map the nasal field first b. Move the stimulus from a non-seeing area to a seeing area The main difference between static and kinetic VFT is a. One is automated and the other is manual b. One tests only the central 10º of VF while the other tests the c. When is performed with a moving stimulus and the other with a central 30º of VF stationary stimulus c. When is performed with a moving stimulus and the other with a stationary stimulus 1/6 d. When is considered a gross assessment of the visual field and the other is a formal methods of visual field testing Which of the following tests only the central 20º of visual field? a. Ptosis Visual Field b. Amsler Grid c. Confrontation Field d. Threshold VFT b. Amsler Grid The performing confrontation visual field testing it is important to define a visual field defect boundaries by vertical and horizontal marks because a. It indicates how dense the defect is b. It ensure there are no artifacts c. It can indicate or rule out neurologic causes d. It helps the doctor determine whether the patient needs glaucoma gets or Sx c. It can indicate or rule out neurologic causes Why is it important to patch or cover the fellow eye when performing VF testing? a. Because the eyes' VA may not be equal b. Because the patient may become distracted by the vision in the eye which is not being tested c. Because the visual fields in each eye overlap one another d. To detect amblyopia c. Because the visual fields in each eye overlap one another Modifying Factors, Context, and Quality are all components of a. CC b. HPI c. ROS d. Past medical Hx b. HPI A PT tells you he smokes cigarettes. Where would you enter this information? a. Medical Hx b. Social Hx c. Med Hx d. Ocular Hx b. Social Hx You are eliciting a chief complaint from a patient who complains of a headache. Which of the following question should you ask him? a. Location? b. Distance or near? c. Any new floaters? d. Any discharge? a. Location? While assessing the patient's pupil size in ambient lighting, you notice the pupils alternately become larger and smaller than larger again understudy illumination. This is a. An APD b. Normal c. Evidence of the accommodative triad d. An Adie's pupil b. Normal Normal pupils a. Are >1 mm different in size b. May have a latent response in one eye and brisk response in the other c. Are different sizes in the dark and light d. Dilate when a light is shined in them c. Are different sizes in the dark and light The amount of contraction and radiation of a pupil depends on a. The amount of ambient room light b. Whether Hippus is present c. The brightness of test light d. A & C e. B & C d. A & C 2/6 Accommodation, Convergence, and Pupillary Constriction are evidence of a. Light Near Dissociation b. The Near Flex Triad c. Absent Light Reflex d. APD b. The Near Flex Triad An Afferent Pupillary Defect a. Only occurs in eyes that have been subject to trauma b. Is sometimes a sign of an underlying disorder c. Is a sign of a Cranial Nerve Palsy d. Can be detected with only one reactive pupil c. Is a sign of a Cranial Nerve Palsy APD can occur in a. Normal eyes b. Strabismus c. Bilateral optic nerve disease d. Optic Neuritis d. Optic Neuritis Anisocoria without ptosis suggests a. Siderosis Bulbi b. Adie's pupil c. Horner's Syndrome d. Third Cranial Nerve Palsy b. Adie's pupil IOL Master Keratometry a. Displays steeper K in warm colours and flatter K in cool colours b. Uses the front surface of the K as a mirror c. Is more accurate than a traditional keratometer d. Is a subjective measurement c. Is more accurate than a traditional keratometer K readings of 42.75/45.25 x 180 indicate a. 2.5D of astigmatism b. Myopia c. A high sagittal height d. A cornea that's been altered by LASIK a. 2.5D of astigmatism With the Rule Astigmatism a. Can only be measured by a corneal topographer b. Indicates keratoconus c. Occurs when the vertical K is steeper than horizontal K d. Occurs when the back surface of the contact lens is the same radius as K c. Occurs when the vertical K is steeper than horizontal K Assuming the diameter remains unchanged, the smaller the BC, the a. Higher the sagittal height of the CL b. Lower the sagittal height of the CL c. Steeper the lens d. Flatter the lens e. A & C f. B & D e. A & C If the radius of a contact lens is same but the diameter is increased a. The lens becomes flatter b. The lens becomes steeper c. There is no effect on the height of the lens d. Not enough information is given to answer b. The lens becomes steeper A Toric contact lens has a. A higher sagittal height than a RGP b. Scribe marks c. A central corneal curvature that's flatter than the periphery d. PD indicators e. All of the above b. Scribe marks An ultrasonic transducer measures a. Contact lens thickness b. Contact lens height d. All of the above 3/6 c. Contact lens base curve d. All of the above Contact lens spherical aberration can be measured by a. Wavefront Aberrometry b. A lensmeter c. A transducer d. A lens clock a. Wavefront Aberrometry All of the following are important for contact lens wearers except a. That they have instruction on insertion and removal b. That they have regular eye exams c. That they do not have cataracts d. That they do not have significant lot or lid margin disease c. That they do not have cataracts You are working up a contact lens patient. Which of these questions is the most important to ask? a. Do you have headaches? b. Do you have a family Hx of CL problems? c. Do you sleep in your CLs? d. Do you have double vision? c. Do you sleep in your CLs? Which of these components is a routine part of a CL work up? a. BAT b. Over refraction c. PAM d. Cyclo refraction b. Over refraction Why is it important to assess CL centration and movement? a. To track corneal changes due to CL wear b. To keep the cornea healthy and the patient comfortable c. Todetermine the fit is according tot he CL manufacturer's directions d. To make sure the patient is doing the Taco Test correctly b. To keep the cornea healthy and the patient comfortable A CL that is too tight will a. Center well b. Be comfortable c. Cause the vision to fluctuate with blink d. All of the above d. All of the above The Taco Test should be performed a. Before inserting the RGP b. After inserting the SCL c. During CL wear d. None of the above d. None of the above The patient should look ___ when inserting a SCL a. Up b. Down c. To the left or right d. Straight ahead a. Up How does a patient center a SCL after insertion? a. By closing and squeezing the eyelids b. By blinking c. By taking one's finger and manually move it d. None of the above b. By blinking The best way to remove a SCL is a. With a CL plunger b. With one's thumb and index finger c. By blinking it out d. Gently touch the lens -it will stick to your finger b. With one's thumb and index finger A RGP lens a. Should be stored and inserted dry b. Has a mark on the left lens c. Should be inserted before applying makeup 4/6 c. Should be inserted before applying makeup d. Rips easily The main goal of counselling a patient regarding CL care is to a. Ensure the patient doesn't become allergic to the lens b. Keep the lenses clean and free of microbes c. Keep the lenses hydrated d. All of the above b. Keep the lenses clean and free of microbes What is the most important step in disinfection CLs? a. Rubbing with a cleaner b. Keeping the lens moist c. Rinsing well with water before disinfecting d. Avoiding MPS a. Rubbing with a cleaner An advantage of Multi Purpose Solution is a. It is less likely to cause allergic reactions than single purpose solutions b. It's convenient and readily available c. You can reuse the solution in the case for several days d. You can clean both lenses at the same time e. All of the above b. It's convenient and readily available Hydrogen Peroxide Disinfection System a. Are preservative free after neutralization b. Do not need to be rinsed before insertion c. Are convenient because the lenses can be left soaking overnight d. A & B a. Are preservative free after neutralization Before beginning manual lensometry it's important to a. Mark the lens b. Wash your hands c. Focus the eye piece d. Read the power wheel drum c. Focus the eye piece Equipment made of metal, plastic, or vinyl should be cleaned by a. Spraying a copious amount of cleaning solution on the equipment then wiping it with a clean, soft cloth d. A soft cloth - either dry or one that has been sprayed with a small b. Compressed air and lint-free cloth amount of cleaning solution c. Alcohol wipes d. A soft cloth - either dry or one that has been sprayed with a small amount of cleaning solution To clean corrosion off of bulb contacts use a. Compressed air b. An eraser c. A cotton tipped applicator that's been damped with alcohol A camel hair brush b. An eraser What's the best way to grasp a bulb? a. Between the them and forefinger b. With a lens cloth or rubber bulb c. With a hemostat d. By the glass part being careful not to touch the metal base b. With a lens cloth or rubber bulb To place the Snellen eye chart at the correct distance for a 10' chart you must a. Use a 20' long room or use mirrors to make the chart 20' away from the patient c. Measure the distance from the chart to the patient to the patient b. Measure the distance from the patient to the chart using mirrors to equal 10' to equal 20' c. Measure the distance from the chart to the patient to the patient to equal 10' d. Make the E double the size it would be for a 20' chart What lime on the Snellen chart is used to calibrate a projector? a. 20/20 b. 20/50 c. 20/200 d. 20/400 c. 20/200