Download NCLE - CLRE Comprehensive Exam Review: Questions and Answers for Opticians and more Exams Optics in PDF only on Docsity!
National Certification Organization
for Opticians
The National Contact Lens Examiners
(NCLE) ABO American Board of Opticianry
CLRE Contact Lens Registry Examination
Course Title and Number: ABO NOCE Competency Exam Exam Title: Registry Exam Exam Date: Exam 2025- 2026 Instructor: [Insert Instructor’s Name] Student Name: [Insert Student’s Name] Student ID: [Insert Student ID]
Examination
180 minutes
Instructions:
**1. Read each question carefully.
- Answer all questions.
- Use the provided answer sheet to mark your responses.
- Ensure all answers are final before submitting the exam.
- Please answer each question below and click Submit when you** **have completed the Exam.
- This test has a time limit, The test will save and submit** **automatically when the time expires
- This is Exam which will assess your knowledge on the course** Learning Resources.
Good Luck!
🤔 Hybridgrades101@gmail.com
Ctrl + Click ✅ ORDER NOW ✅ Follow
Link
& Get Instant
Expert Help
NCLE - CLRE Comprehensive Exam Review Questions and Answers | 100% Pass Guaranteed | Graded A+ | 2025- The National Contact Lens Examiners NCLE ABO American Board of Opticianry CLRE Contact Lens Registry Examination
Read All Instructions Carefully and Answer All the
Questions Correctly Good Luck: -
- Keratitis sicca is a severe dryness of the cornea. This leaves the cornea at risk exposing it to complications related to secondary infection.
- Upon removal of the crystalline lens, the patient is: A. Aphakic B. Myopic C. Hyperopic D. Astigmatic - =Answer>> A. Aphakic
- Is the absence of the crystalline lens
- The following Rx represents:
- OD +2.00 = 20/
- OS -3.00 -2.00 x 180 = 20/
Need Writing 🤔Help? We've Got You Covered! ✍
100% NO A I or Plagiarism Guaranteed🤔
🤔 ORDER NOW 🤔
🤔 Hybridgrades101@gmail.com
- The keratometer is an instrument used to measure: A. Corneal curvature B. Lens power C. Lens diameter D. Lens thickness - =Answer>> A. Corneal curvature
- An instrument used to evaluate corneal irregularity by reflecting concentric circle from the patient's cornea is called a: A. Burton lamp B. Con-Ta-Chek C. Topogometer D. Placido disk - =Answer>> D. Placido disk
- A burton lamp evaluates fluorescein patterns in the absence of a slit lamp. A Con-Ta-Chek is an attachment to the keratometer that enables one to read the base curve in the absence of a radiuscope. A topogometer is also an attachment for the keratometer and is used to define the corneal apex
- Which auxiliary trial lens will extend the keratometer to approximately 61.00D? A. -1.25D B. +1.25D C. -1.50D D. +1.50D - =Answer>> B. +1.
- The range of the keratometer is 36.00D to 52.00D. To extend the range above 52.00D, a +1.25 lens is used
- Wearing lenses in high altitudes and dry environments may result in complaints of all but the following: A. Photophobia B. Chalazion
Need Writing 🤔Help? We've Got You Covered! ✍
100% NO A I or Plagiarism Guaranteed🤔
🤔 Hybridgrades101@gmail.com C. Grittiness D. Burning sensation - =Answer>> B. Chalazion
- Is an inflammation of a meibomian gland and is not related to dryness
- Patients with which of the following occupations can successfully wear contact lenses? A. Arc welders B. Firefighters C. Teachers D. All of the above - =Answer>> D. All of the above
- People in the most occupations can successfully wear contact lenses as long as their eye care provider's instructions are followed in terms of wearing time, care handling, replacement schedule, the use of safety glasses and follow-up. Arc welders can, it's only a myth that they can't.
- Transient keratometric mire distortion is usually due to: A. Pre-ocular tear film B. Prolonged rigid lens wear C. Prolonged soft lens wear D. Irregular corneal astigmatism - =Answer>> A. Pre-ocular tear film
- While prolonged rigid lens wear, prolonged soft lens wear and irregular corneal astigmatism may all cause mire distortion, the mire distortion will remain constant. Of the choices listed, only the tear film results in transitory mire distortion which can be cleared up if you ask the patient to blink
- In against-the-rule astigmatism, the steepest corneal meridian:
Need Writing 🤔Help? We've Got You Covered! ✍
100% NO A I or Plagiarism Guaranteed🤔
🤔 Hybridgrades101@gmail.com
- Lid attachment RGP fits should show a thin, even edge-to- edge layer of fluorescein stained tear film that exhibit alignment or slight apical feathering as well as less than 180 degrees of bearing in the mid-periphery to allow for a good tear exchange with each blink
- In an RGP wearer, arcuate stain on the cornea may be due to: A. Failure to close the lids completely when blinking B. A lens fit that is excessively flat C. Poorly blended secondary curves D. Solution sensitivituy - =Answer>> C. Poorly blended secondary curves
- Choice A will result in 3 and 9 o'clock staining Choice B would cause apical keratitis (SPK) from limbus to limbus
- In a Schirmer 1 Test: A. The patient should produce sufficient tears to saturate the paper strip in 3 minutes B. An anesthetic drop is instilled in the eye to eliminate reflex tearing C. Fluorescein must be instilled in the eye to measure tear film D. A patient with an unanesthetized eye and normal tear output should wet at least 15mm of the filter paper in 5 minutes - =Answer>> D.
- The Schirmer 1 test is done without anesthesia and a patient with normal tear output should wet at least 15mm of the strip in 5 minutes.
- In a Schirmer 2 test:
Need Writing 🤔Help? We've Got You Covered! ✍
100% NO A I or Plagiarism Guaranteed🤔
🤔 Hybridgrades101@gmail.com A. Break-up time must be at least 10 seconds if a patient is to be a successful contact lens wearer B. An anesthetic drop is instilled before the Schirmer strip is inserted to eliminate the reflex tearing caused by the filter paper C. A normal reading guarantees that the patient is producing sufficient tears for successful contact lens wear D. If the patient wets the entire Schirmer strip, they have xerosis and should not wear contact lenses. - =Answer>> B.
- The Schirmer 2 test is an anesthetic drop is instilled before the Schirmer strip is inserted to eliminate the reflex tearing caused by the filter paper
- Rose Bengal testing: A. Is usually not necessary because the same information can be obtained by Schirmer testing B. Will stain devitalized conjunctival epithelial cells brightly C. Will only stain healthy epithelial cells brightly D. Can be used to evaluate RGP lens fit instead of fluorescein - =Answer>> B.
- Rose bengal will cause a dense, confluent staining with a uniformly intense red color in a pathologically dry eye and a discrete punctate conjunctival stain in a marginally dry eye, since it binds strongly and selectively to devitalized cellular components.
- When evaluating tear film break-up-time: A. Rose Bengal will give a more accurate reading than fluorescein B. Fluorescein should be instilled in the eye and the patient not allowed to blink until a reading is taken C. A break-up-time of less than 10 seconds may preclude success with contact lenses
Need Writing 🤔Help? We've Got You Covered! ✍
100% NO A I or Plagiarism Guaranteed🤔
🤔 Hybridgrades101@gmail.com C. Monovision is impossible to adapt to D. It is even more difficult to see the computer than to read with contact lenses contain their distance prescription - =Answer>> A. They are unable to see fine print when fit with contact lenses
- Amy's +8.50 D spectacles sit 12mm from the cornea. The power of a soft contact lens for Amy, properly vertexed would be: A. +8. B. +8. C. +9. D. +11.00 - =Answer>> C. +9.
- Vertex distance must be taken into account when spectacle power is +4.00D
- Which of the following choices would work best for the patient's visual needs given the following information:
- K's 44.00 @ 180 / 45.25 @ 90
- Rx -3.00 +0.25 x 90 A. RGP lens: 45.25 -3. B. RGP lens with toric posterior curves C. Soft toric lens D. Spherical soft lens - =Answer>> D. Spherical soft lens
- Assessment of the quality of the peripheral curves (blends of a rigid contact lens) is achieved by the use of the- a. profile analyzer b. shadow graph c. keratometer d. burton light - =Answer>> a. profile analyzer
- Contact lens power should be specified in- a. back vertex power
Need Writing 🤔Help? We've Got You Covered! ✍
100% NO A I or Plagiarism Guaranteed🤔
🤔 Hybridgrades101@gmail.com b. sphero-cylinder power c. power in situ d. posterier apical radius - =Answer>> a. back vertex power
- The slit-lamp illumination that gives an overall view of the cornea but limits detail is- a. sclerotic scatter b. diffuse c. specular reflection d. oscilatory - =Answer>> b. diffuse
- When a keratometric miers reflected off a soft contact lens are only clear when the wearer blinks, the lens fit is too- a. small b. large c. steep d. flat - =Answer>> c. steep
- Transient keratometric mier distortion is usually due to- a. pre-ocular tear film abnormalities b. prolonged rigid lens wear c. prolonged soft lens wear d. irregular corneal astigmatism - =Answer>> a. pre-ocular tear film abnormalities
- Epithelial edema which manifests itself clinically as central corneal haze, is verified by the slit lamp using sclerotic scatter illumination. What specific technique does the examiner use to see this condition? a. the naked eye and an angle between the slit lamp beam and the eye of 90˚ b. the blue cobalt filter of the slit lamp and an angle of about 45˚ c. the green filter of the slit lamp with high magnification
Need Writing 🤔Help? We've Got You Covered! ✍
100% NO A I or Plagiarism Guaranteed🤔
🤔 Hybridgrades101@gmail.com a. measuring magnifier b. ophthalmometer c. profile analyzer d. radiuscope - =Answer>> a. measuring magnifier
- (the book says d. radiuscope)
- The instrument used for magnification of the edge of a rigid CL is a _______. a. radiuscope b. shadowgraph c. profile analysis d. keratometer - =Answer>> b. shadowgraph
- Mary is wearing in her right eye RGP lens with a base curve of 43.50 and a power of +2.75. The doctor refracts -0.75 sphere over this lens. If you wish to order her a new lens with a curve of 43.00, what will the new power be? a. +1. b. +2. c. +2. d. +3.00 - =Answer>> c. +
- Which of the following could be considered in the fitting of a keratoconus patient
- aspheric
- McGuire
- Soper
- tangent streak a. 1 & 2 b. 2 & 3 c. 3 & 4 d. 1, 2 and 3 - =Answer>> d. 1, 2 and 3
- Two designs helpful in orienting high riding myopic lenses are:
- flattening the B.C. relationship
Need Writing 🤔Help? We've Got You Covered! ✍
100% NO A I or Plagiarism Guaranteed🤔
🤔 Hybridgrades101@gmail.com
- myo-flang
- hyper-flang
- prism ballast a. 1 & 2 b. 1 & 3 c. 2 & 3 d. 3 & 4 - =Answer>> d. 3 & 4
- Age/related signs of presbyopia include:
- tear film abnormalities
- reduce lid elasticity
- lens opacities
- pupil constriction a. 1 only b. 1 & 3 c. 2 & 4 d. all of the above - =Answer>> d. all of the above
- A good example of a bifocal contact lens which may rotate without vision imparement is: a. aspheric b. executive c. fused crescent d. tangent streak - =Answer>> d. tangent streak
- Keratoconus and penetrating keratoplasty fittings are best accomplished by which of the following methods? a. nomogram b. Ks and Rx c. diagnostic fitting d. molded impression - =Answer>> c. diagnostic fitting
- Given the following information:
- K's 45.00/44.00 @ 90
Need Writing 🤔Help? We've Got You Covered! ✍
100% NO A I or Plagiarism Guaranteed🤔
🤔 Hybridgrades101@gmail.com d. 43.00 -3.50 - =Answer>> b. 42.50 -3.00-1.00x90 prism ballasted
- Given the following information: K's 42.00@180/45.00@
- Rx -3.00-2.25x
- Which of the following set of RGP lens specifications will best correct this wearers vision? a. 42.00/45.00 -3.00-2. b. 42.00 -3.00-2.75 x 177 prism ballasted c. 42.00 -3. d. 45.00 -3.00 - =Answer>> a. 42.00/45.00 -3.00-2.
- A warped lens will show___________ base curve(s) on the radiuscope and a ________ power on the lensometer. a. one/spherical b. two/sphero-cylindrical c. one/sphero-cylindrical d. two/spherical - =Answer>> d. two/spherical
- The pre-corneal tear film is composed of three distinct layers. They are: a. Lysozyme, oil, lacrimal b. Sebacious, mucoid, BAK c. lipid, lacrimal, mucin d. water, mucoid, lysozyme - =Answer>> c. lipid, lacrimal, mucin
- The pre-corneal tear film provides
- A smooth optical surface
- Metabolic nutrients
- Endothelial reflex
- Limbal Hyperemia
Need Writing 🤔Help? We've Got You Covered! ✍
100% NO A I or Plagiarism Guaranteed🤔
🤔 Hybridgrades101@gmail.com a. 1& b. 1& c. 2& d. 3&4 - =Answer>> b. 1&
- The main supply of oxygen to the cornea is derived from the a. Endothelium b. Collagen Fibrils c. Basal membrane d. Tears - =Answer>> d. Tears
- The cornea has five distinct layers. In order from anterior (front) to posterior(back) they are: a. Epithelium, Descemets membrane, Stroma, Bowmans membrane, Endothelium. b. Endothelium, Stroma, Bowmans membrane, Descemets membrane, Epithelium. c. Epithelium, Bowmans membrane, Stroma, Descemets membrane, Endothelium. d. Endothelium, Bowmans membrane, Stroma, Descemets membrane, Epithelium. - =Answer>> c. Epithelium, Bowmans membrane, Stroma, Descemets membrane, Endothelium.
- The normal cornea is transparent due to the pump action creating proper fluid balance. Which layer of the cornea is most responsible for maintaining this function? a. Endothelium b. Basal membrane c. Epithelium
Need Writing 🤔Help? We've Got You Covered! ✍
100% NO A I or Plagiarism Guaranteed🤔
🤔 Hybridgrades101@gmail.com d. Corneal ulcer - =Answer>> c. Arcus senilus
- The main focusing mechanism of the eye is the a. Cornea b. Crystalline Lens c. Retina d. Vitreous - =Answer>> b. Crystalline Lens
- A normal tear break up time is a. 6-7 seconds b. 10-12 seconds c. Less than 5 seconds d. none of the above - =Answer>> b. 10-12 seconds
- Which of the following materials will not require a weekly enzymatic cleaner? a. Polymethylmethacrylate lenses b. Sofperm c. Hydroxyethyl Methacrylate lenses d. Silicone - acrylate lenses - =Answer>> a. Polymethylmethacrylate lenses
- Clinical management of RGP flexure may be eliminated by: a. redicing sagittal vaulting b. increasing center thickness c. Choosing a lower DK material d. all the above - =Answer>> d. all the above
- Upon removal of the crystalline lens, the patient is: a. aphakic b. myopic c. hyperopic d. astigmatic - =Answer>> a. aphakic
Need Writing 🤔Help? We've Got You Covered! ✍
100% NO A I or Plagiarism Guaranteed🤔
🤔 Hybridgrades101@gmail.com
- a hardening of the crystalline lens causing loss of accommodation is known as: a. presbyopia b. myopia c. hyperopia d. aphakia - =Answer>> a. presbyopia
- A rigid contact lens measures +15.00 BVP. The FVP will measure. a. a lesser dioptric reading b. a greater dioptric reading c. an identical dioptric reading d. an astigmatic reading - =Answer>> a. a lesser dioptric reading
- Which of the following will not measure lens parameters a. Keratometer b. Radiuscope c. Burton lamp d. Thickness gauge - =Answer>> c. Burton lamp
- A low riding high plus on a 40.00/40.75 cornea could be corrected with a. a myoflange b. a hyperflange c. a one cut d. a panafocal - =Answer>> a. a myoflange
- The following ametropia frequently results in high riding rigid lenses a. high myopia b. high hyperopia c. aphakia
Need Writing 🤔Help? We've Got You Covered! ✍
100% NO A I or Plagiarism Guaranteed🤔
