Knowledge Self Assessment Contact Lens 1Page 12Page 23Page 34Page 4 1) A patient visited the optical dispensary and ordered contact lenses from his optician. He calls the next day to inform the optician that he has tested positive for COVID-19. What should the optician do?(Required) A: Note the diagnosis in the patient record, assure the patient that the staff at the dispensary have been well, and wish the patient a quick recovery. B: With the help of other staff, disinfect the dispensary, enforce rules to do so continuously, and use gloves and masks until staff can be tested for COVID-19, self-isolating if they test positive or have symptoms. C: Note the diagnosis in the patient record, inform the other staff in the dispensary, and close the dispensary for 1 week. The optician should self-isolate and arrange for all staff to be tested for COVID-19. 2) Which of the following invade cells and use the reproductive mechanism of the cell to multiply, eventually killing the cell?(Required) A: Viruses B: Bacteria C: Fungi 3) Rosita is 16 years old. Her right eye was patched for about 3 months when she was 6 years old. She has recently had an eye examination and her new Rx is: OD +1.00 −1.75 × 135 OS +2.50 −2.00 × 040 Her visual acuity is: OD 20/20 OS 20/60 OU 20/25 Rosita plays tennis and hopes to get contact lenses to improve her vision during sports. How should the optician describe the patient’s refractive condition and the likelihood that contact lenses will improve her visual acuity and binocular vision compared to her eyeglasses?(Required) A: Rosita is amblyopic in the left eye, and contact lenses will not enhance her binocular vision or visual acuity. B: Rosita is amblyopic in the right eye, and contact lenses will improve her binocular vision and visual acuity. C: Rosita has both amblyopia and antimetropia, and contact lenses will give her the same vision as eyeglasses. 4) A 16-year-old student was diagnosed with advanced keratoconus in her right eye a year ago. She had poor visual acuity with eyeglasses and was fit with rigid gas permeable lenses and had adequate wear time and visual acuity. The patient has been using a multi-purpose rigid gas permeable lens solution daily to clean, disinfect, and condition her lenses. She had an infection in the right eye 2 months ago, for which she received medical treatment. She now has a new infection in the same eye. Which of the following should the optician recommend to reduce the possibility of recurring infection?(Required) A: Switch to eyeglasses. B: Switch to daily disposable contact lens. C: Add hydrogen peroxide to the care system. 5) An optician is fitting a new contact lens patient with monthly disposable contact lenses. His eyeglass Rx and keratometry readings are as follows: Eyeglass Rx: OD −4.75 OS −4.25 Keratometry readings: OD 45.25 @ 180/46.50 @ 090 OD 45.75 @ 180/47.00 @ 090 Which of the following contact lens parameters are best suited for this patient?(Required) A: OD −4.50, base curve 8.4 D, diameter 14.5 mm OS −4.00, base curve 8.4 D, diameter 14.5 mm B: OD −4.75, base curve 8.7 D, diameter 14.2 mm OS −4.25, base curve 8.7 D, diameter 14.2 mm C: OD -4.50, base curve 8.6 D, diameter 13.8 mm OS -4.00, base curve 8.6 D, diameter 13.8 mm 6) Which instrument does an optician use to determine a patient’s corneal measurements?(Required) A: Slit-lamp B: Keratometer C: Radiuscope 7) What instrument should an optician use to evaluate whether a rigid gas permeable contact lens is warped?(Required) A: Lensometer B: Radiuscope C: Biomicroscope 8) An optician receives a pair of rigid gas permeable lenses back from the lab. What must the optician check when visually inspecting the lenses before dispensing them to the patient?(Required) A: That the power of the lenses falls within standard tolerance. B: That the lenses are free from surface or edge defects, chips, or scratches. C: That the lenses are not inside out (by using the “taco test”). 9) A patient is fitted with new soft contact lenses with the following specifications:OU −2.00, base curve 8.4 D, diameter 14.0 mmAt her 1-week follow-up, the patient complains that after a couple of hours of wearing the lenses, they become uncomfortable and her vision becomes inconsistent. The optician performs an assessment and notes the following: * VA is 20/40 and upon blink is 20/20. * Keratometry mires over contact lenses are unclear, then become clear on blink.Which of the following lenses should the optician select for this patient?(Required) A: OU −2.00, base curve 8.7 D, diameter 14.0 mm B: OU −2.00, base curve 8.2 D, diameter 14.0 mm C: OU −2.00, base curve 8.2 D, diameter 14.5 mm 10) Which instrument does the optician use when verifying the power on a rigid gas permeable contact lens?(Required) A: Radiuscope B: Keratometer C: Lensometer 11) What should an optician recommend to a soft contact lens wearer who takes antidepressant medication?(Required) A: Reduce wear time and use eye lubricants. B: Replace the soft contact lenses with rigid gas permeable lenses. C: Replace the soft contact lenses with hybrid lenses. 12) A patient has been diagnosed with advanced keratoconus in the OS eye. He had a corneal cross-linking procedure to prevent progression of the condition 4 months ago. His current visual acuity is:OD 20/20 OS 20/400 His ophthalmologist refers him to the optician for a contact lens fitting. What modality of lens should the optician recommend?(Required) A: Scleral lens B: Soft spherical lens C: Soft toric lens 13) A patient has been wearing conventional soft contact lenses and using a multipurpose solution for the past year. He does not wear eyeglasses. At his annual follow-up, he complains about decreased wear time and vision inconsistency for the past month. His optician measures his visual acuity wearing the lenses as 20/20 when clear. Biomicroscopy shows clear cornea and sclera.Which of the following conditions should the optician consider to be the most likely cause of the complaint?(Required) A: Sub-conjunctival hemorrhage B: Giant papillary conjunctivitis C: Superficial punctate keratitis 14) Which of the following would an optician use to determine a patient’s eye dominance?(Required) A: Monocular visual acuity test B: Fogging technique C: Confrontation test 15) A patient wears OU −5.25 contact lenses. At a regular follow-up appointment, his optician measures his monocular and binocular visual acuity while wearing the contact lenses as 20/30.What should the optician do first to try to improve the patient’s vision?(Required) A: Insert −5.50 contact lenses OU. B: Insert −5.00 contact lenses OU. C: Perform manifest over-refraction. 16) A 26-year-old construction worker wears OU −10.00 monthly disposable contact lenses and uses multi-purpose solution for soft lenses. At his 6-month contact lens follow-up he complains about his eyes feeling dry. His current lenses are 2 weeks old. Biomicroscopy shows mild deposits and good centration and lens movement. Tear breakup time is 13 seconds.What should the optician recommend to address the patient’s complaints?(Required) A: Switching to daily disposable contact lenses. B: Switching to rigid gas permeable contact lenses. C: Wearing protective eyeglasses over his current lenses while on the construction site. 17) A patient comes in for her 2-week follow-up wearing her new soft monthly disposable contact lenses. She tells the optician the lenses burn when she puts them in in the morning and her eyes water, but after about 20 minutes the burning goes away. What question should the optician ask first to solve this problem?(Required) A: What type of contact lens solution are you storing the lenses in? B: Are the contact lenses comfortable at the end of the day? C: How many hours a day are you wearing your contact lenses? 18) During a routine contact lens follow-up, the optician learns that the patient is routinely extending their wear times and periodically sleeping in their hydrogel soft contact lenses. The patient’s eyes appear clear under a slit-lamp evaluation. How should the optician proceed with this patient?(Required) A: Recommend that the patient switch to silicone hydrogel soft contact lenses. B: Stop dispensing contact lenses to the patient. C: Continue to monitor the patient’s contact lens wear at routine follow-ups. 19) A patient tells her optician she was told she has 20/40 vision. She asks the optician to explain what that means. Which of the following explanations should the optician provide?(Required) A: 20/40 vision means you can see the eye chart clearly from 40 ft away and someone with perfect vision can see it clearly from 20 ft away. B: 20/40 vision means you can see the eye chart clearly from 20 ft away and someone with perfect vision can see it clearly from 40 ft away. C: 20/40 vision means you were 40 ft away from the eye chart when you were be able to read the 20/20 line on the chart. 20) A patient visits a new optician for the first time. She has worn contact lenses for many years. What question must the optician ask when obtaining information about the patient’s contact lens history?(Required) A: Do you have a family history of seasonal allergies or asthma? B: How often do you replace your current contact lenses? C: What were your keratometry readings, base curve, and diameter for your previous contact lenses? 21) What does “3-point touch” mean in soft contact lens fitting practice?(Required) A: Three fingers are used to insert the lens in the eye. B: The 3, 6, and 9 o’clock positions are the reference points on a soft toric contact lens. C: The lens contacts the eye at 3 points. 22) An optician fits his patient, Kelsie, with soft toric monthly disposable contact lenses with the following parameters:OD +4.00 −0.75 × 090, base curve 8.4 D, diameter 14.0 mmOS +5.25 −1.25 × 080, base curve 8.4 D, diameter 14.0 mmAfter having Kelsie wear the lenses for a few hours, the optician observes the fit of the lenses using the slit-lamp. He notes that the lenses are very well centred but are not moving when Kelsie blinks. He also notices some redness around the cornea. Kelsie reports that the lenses felt comfortable at first but are now starting to bother her. She also finds that her vision does not seem clear all the time, but it seems better right after she blinks.What should the optician do to correct the problem?(Required) A: Select a larger diameter lens of 14.2 mm. B: Select a smaller base curve of 8.2 D. C: Select a larger base curve of 8.6 D. 23) A patient has the following Rx and measurements: OU −8.25 −0.50 × 180 Keratometry reading OU 42.00/45.00 @ 090Which contact lenses should the optician recommend for this patient?(Required) A: Rigid gas permeable spherical lenses B: Soft toric lenses C: Soft spherical lenses 24) Jeremie visits his optician, Caroline, to pick up his first pair of bifocal contact lenses. Jeremie speaks French and knows very little English. Caroline does not speak French, although she works in a predominately French community. She explains to Jeremie, in English, the use, limitations, and features of the contact lenses. Before Jeremie leaves his appointment, what should Caroline do to make sure Jeremie has fully understood the communication?(Required) A: Explain to Jeremie, in as much French as she can manage, the proper care and maintenance for his new contact lenses. B: Seek non-verbal feedback from Jeremie, such as a nod or a thumbs up, during her explanations. C: Provide Jeremie with written care and maintenance instructions for contact lenses in French. 25) Jason, age 21, asks his optician to recommend an alternative to wearing his regular eyeglasses while playing hockey 3 times a week. The optician documents the following information in Jason’s patient record:Eyeglass Rx:OD –2.75 −0.25 × 180OS –3.00 −0.25 × 180Pupillary distance 28.5 mm/29 mm Keratometry readings:OD 43.00 @ 180/43.50 @ 090OS 42.75 @ 180/43.25 @ 090Jason has seasonal allergies and mild dry-eye syndrome. He is a university student and spends a lot of time studying and working on a computer.What should the optician recommend that Jason wear while playing hockey?(Required) A: Soft daily disposable contact lenses with the following parameters:OD −2.75, base curve 8.6 D, diameter 14.2 mm OS −3.00, base curve 8.6 D, diameter 14.2 mm B: Rx sports goggles with polycarbonate lenses and an anti-reflective coating with the following parameters:OD −2.75 -0.25 x 180OS –3.00 -0.25 x 180Pupillary distance 28.5 mm/29 mm C: Scleral contact lenses with the following parameters:OD −2.75, base curve 7.5 D, diameter 15.0 mmOS −3.00, base curve 7.5 D, diameter 15.0 mm 26) Brenda is being fitted for soft contact lenses for the first time. The optician reviews Brenda’s patient history and notices she has hyperthyroidism. What side effects of hyperthyroidism should the optician tell Brenda she may experience while wearing contact lenses?(Required) A: Redness and itching or a burning sensation in the eyes. B: A feeling of dry, gritty, or watery eyes. C: Foggy vision after removing lenses. 27) Julie, an optician, fits a patient for his first pair of soft toric contact lenses with the following parameters:OD −3.00 −1.75 × 040, base curve 8.4 D, diameter 14.2 mmOS −3.50 −1.25 × 130, base curve 8.4 D, diameter 14.2 mmWhen the patient returns for his 2-week contact lens follow-up, Julie notices that on the right eye, the orientation marks on the contact lens are rotated from the lower centre 6 o’clock position, slightly left to the 7 o’clock position. How can Julie correct this?(Required) A: Change the OD to:Rx −3.00 −1.75 × 050, base curve 8.4 D, diameter 14.2 mm B: Change the OD to:Rx −3.00 −1.75 × 030, base curve 8.4 D, diameter 14.2 mm C: Change the lenses to:OD −3.00 −1.75 × 040, base curve 8.6 D, diameter 14.0 mmOS −3.50 −1.25 × 130, base curve 8.6 D, diameter 14.0 mm 28) Which solution should an optician fill a scleral lens with before inserting it into the patient’s eye?(Required) A: Hydrogen peroxide B: Multi-purpose solution C: Preservative-free saline 29) Which of the following medical or ocular health history information gathered by the optician could contraindicate contact lens wear?(Required) A: The patient takes medication for high blood pressure. B: The patient has a history of allergic conjunctivitis. C: The patient has a history of asthma and bronchitis. 30) Debbie was recently fitted with a new pair of contact lenses based on an Rx issued at a recent eye exam. Debbie’s optician, Javier, trained her on lens handling and the lens care system. During the fitting Debbie’s vision was clear and she was happy with the lenses.At her 2-week follow-up, Debbie complains about persistent double vision. She has no problem with her new eyeglasses, which were ordered based on the same Rx used to determine the contact lens specifications.What should Javier do first?(Required) A: Refer the patient to her optometrist with a note about the persistent double vision. B: Ask the patient to use eyeglasses only and explain that contact lenses are not suitable for her. C: Perform a contact lens fit check, visual acuity test, and manifest over-refraction with the contact lenses. 31) A patient has −4.00 D of astigmatism OU and has been fitted with hybrid contact lenses. She has been advised to change her lenses every 6 months.Which cleaning regimen should the optician demonstrate to the patient to maintain the lenses and minimize the chance of infection?(Required) A: Hydrogen peroxide solution followed by multi-purpose soft lens solution. B: Rigid gas permeable lens solution followed by multi-purpose soft lens solution. C: Hydrogen peroxide solution followed by rigid gas permeable lens solution. 32) Which of the following pieces of information must the optician provide to the supplier when ordering soft contact lenses?(Required) A: The patient’s eyeglass Rx. B: The patient’s keratometry readings. C: The selected base curve. 33) At an appointment with her optician, a 40-year-old patient mentions that she is concerned about her recent difficulty with near vision. The optician measures her distance visual acuity as 20/20 while wearing her current contact lenses. Her contact lens Rx is:OU +1.50 −0.75 × 180The fit of the contact lenses is satisfactory and there are no signs of over-wear during a slit-lamp examination. Manifest over-refraction is 0.00 D.What refractive condition should the optician discuss with this patient that could cause the problems with her ability to read?(Required) A: Increased myopia. B: Increased hyperopia. C: Increased presbyopia. 34) A patient sees her optician for a contact lens fitting and training. After successfully training the patient on insertion and removal and checking the fit of the lens, the optician sends her home with the lenses and a follow-up appointment schedule. Which of the following schedules should the optician have recommended?(Required) A: The patient should be seen in 2 weeks, then again in 2 years. B: The patient should be seen in 3 months, then again in 6 months. C: The patient should be seen in 2 weeks, then again in 1 year. 35) A patient is being fitted for contact lenses. The optician notes the following medications listed in her medical history: omega-3 supplements, acetaminophen (occasionally, when required), and birth control pills. Which of these medications may be a contraindication for contact lens wear?(Required) A: Omega-3 supplements B: Acetaminophen C: Birth control pills 36) A patient calls his optician seeking help with a contact lens problem. The rigid gas permeable lens has decentred temporally on his left eye and he is not sure what to do. How should the optician instruct him to recentre the lens?(Required) A: Look to the right, looking toward your nose, and hold the outer eyelid margins against the eye and slowly look to the left, toward your left ear. B: Look upward and hold the lower eyelid margin against the eye and slowly look down. C: Look to the left, toward your left ear, and hold the inner eyelid margin against the eye and slowly look to the right, toward your nose. 37) What test can an optician perform to assess tear quality?(Required) A: Tear breakup time test B: Schirmer’s test C: Rose Bengal test 38) A 61-year-old patient currently wears soft spherical contact lenses. He is a heavy smoker, is overweight, and has high blood pressure. At his annual contact lens follow-up, he complains to his optician of blurred vision, occasional flashes of light, spots in his field of view, and recent sudden loss of vision. What eye condition should the optician recognize as the most likely cause of these symptoms?(Required) A: Diabetic retinopathy B: Cataracts C: Keratoconus 39) What tool does an optician use to calibrate a keratometer?(Required) A: Test sphere or ball B: Focusing rod C: Topogometer 40) Cameron visits his optician to see if she can help him see better. Cameron has been diagnosed with keratoconus and has a new Rx:OD −2.50 −6.50 × 075OS −3.00 −7.00 × 160Which option should the optician recommend to give Cameron the best vision correction?(Required) A: Rigid gas permeable contact lenses B: Soft daily disposable contact lenses C: 1.67 high-index eyeglasses with anti-reflective coating
