NCLE Exam Practice questions with verified answers, Exams of Nursing

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NCLE Exam Practice questions with

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Which of the following medications may affect successful contact lens wear? A. Antacids B. Antihistamines C. Aspirin D. Laxatives - ANSWER: B. Antihistamines Which term refers to a sensitivity to light? A. Presbyopia B. Photophobia C. Pannus D. Ptosis - ANSWER: B. Photophobia The following is an example of what type of astigmatism? K's 42.50 @ 180 / 40.50 @ 090 A. With-the-rule B. Lenticular C. Against-the-rule D. Irregular - ANSWER: C. Against-the-rule The cornea receives nutrients from:

1. Aqueous humor
2. Tears
3. Limbal blood vessels
4. Orbicularis occuli

A. 1, 3, 4

B. 2, 3

C. 1, 2, 3

D. 3, 4 - ANSWER: C. 1,2,

The increased loss of ability of the crystalline lens to accommodate is called A. Presbyopia B. Myopia C. Hyperopia D. Aphakia - ANSWER: A. Presbyopia Which instrument can provide simultaneous information about the cornea, lids, conjunctiva, lashes, contact lens surface and fit? A. Radiuscope B. Corneascope C. Slit lamp D. Keratometer - ANSWER: C. Slit lamp The classic model of the pre-corneal tear film is composed of three layers which are A. Lysozyme, oil, lacrimal B. Sebaceous, mucoid, BAK C. Lipid, aqueous, mucin D. Water, mucoid, lysozyme - ANSWER: C. Lipid, aqueous, mucin Transpose the following RX into minus cylinder form RX -4.50 +1.25 x 094 A. -3.25 -1.25 x 004 B. -3.25 -1.25 x 094

C. -4.50 -1.25 x 004 D. -5.75 -1.25 x 004 - ANSWER: A. -3.25 -1.25 x 004 The average pH value of the human tear is A. 6. B. 7. C. 7. D. 10.0 - ANSWER: B. 7. If the manufacturer's guidelines suggest a minimum of 4 hours of disinfection, what would you suggest to the patient? A. Never leave lenses in disinfectant overnight B. 2-3 hours is probably enough C. Use surfactant cleaner and preserved saline D. A minimum of 4 hours is required - ANSWER: D. A minimum of 4 hours is required The main supply of oxygen to the cornea epithelium is derived from the A. Stroma B. Collagen fibrils C. Basal membrane D. Tear film - ANSWER: D. Tear film What is the term for the condition in which there is loss of vision without any apparent disease of the eye? A. Amblyopia B. Aniridia C. Astigmatism D. Aphakia - ANSWER: A. Amblyopia

Which auxiliary trial lens will extend the keratometer range to approximately 30.00 D? A. +1.00 D B. +1.25 D C. -1.00 D D. -1.50 D - ANSWER: C. -1.00 D Which steps should be performed first when taking keratometer measurements? A. Rotate the drum to reflect the cylinder axis B. Adjust the patient so that they are comfortable C. Focus the eyepiece D> Cover the patient's eye that is not being measured - ANSWER: C. Focus the eyepiece The following is an example of what type of astigmatism? K's 44.00 @ 180 / 44.50 @ 090 RX -3.00 -2.50 x 180 A. Lenticular B. Against-the-rule C. Irregular D. Oblique - ANSWER: A. Lenticular Ocular signs of aging include

1. Tear film abnormalities
2. Reduced lid elasticity
3. Lens opacities
4. Loss of accommodation A. 1 only B. 1, 3 C. 2, 4

D. All the above - ANSWER: D. All the above Transpose the following RX into minus cylinder form RX +1.50 +1.00 x 075 A. +1.50 -1.00 x 075 B. +2.50 -1.00 x 075 C. +2.50 -1.00 x 165 D. +2.50 -1.00 x 175 - ANSWER: C. +2.50 -1.00 x 165 The pre-corneal tear film provides

1. A smooth optical surface
2. Metabolic nutrients to the epithelium
3. Oxygen to the endothelium
4. Limbal hyperemia A. 1, B. 1, C. 2, D. 3,4 - ANSWER: b. 1, The cornea has five distinct layers. In order from anterior to posterior they are A. Epithelium, Descemet's membrane, Stroma, Bowman's layer, Endothelium B. Endothelium, Stroma, Bowman's layer, Descemet's membrane, epithelium C. Epithelium, Bowman's layer, Stroma, Descemet's membrane, Endothelium D. Endothelium, Bowman's layer, Stroma, Descemet's membrane, Epithelium - ANSWER: C. Epithelium, Bowman's layer, Stroma, Descemet's 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 D. Bowman's layer - ANSWER: A. Endothelium A normal tear break-up time is A. 6-7 seconds B. 10-12 seconds C. Less than 5 seconds D. More than 20 seconds - ANSWER: B. 10-12 seconds A whitish haze in the peripheral corneal stroma which does not stain and is often seen in the elderly is known as A. Neovascularization B. Dellen C. Arcus Senilus D. Fuch's dystrophy - ANSWER: C. Arcus Senilus Patients with keratitis sicca are more prone to A. Secondary infections B. Loss of eyelashes C. Losing their contact lenses D. Steeping corneas - ANSWER: A. Secondary infections Upon removal of the crystalline lens the patient is A. Aphakic B. Myopia C. Hyperopia D. Astigmatic - ANSWER: A. Aphakic

The following RX prepresents OD +2. OS -3.00 -2.00 x 180 A. Presbyopia B. Anisometropia C. Amblyopia D. Emmetropia - ANSWER: B. Anisometropia The patient in the previous question will best achieve stereopsis with which of the following modalities? A. Contact lenses B. Spectacles C. IOL D. Bifocals - ANSWER: A. Contact lenses Tom's spectacles with a power of -12.00 +0.50 x 090, sit 10mm in front of his cornea. The likely soft contact lens prescription for Tom would be A. -10.50 D B. -11.75 D C. -12.00 D D. -12.50 D - ANSWER: A. -10.50 D The keratometer is an instrument used to measure A. Corneal curvature B. Lens power C. Lens diameter D. Lens thickness - ANSWER: A. Corneal curvature

The average life span of a corneal epithelial cell from mitosis through maturation and desquamation most nearly approximates A. One day B. One week C. One month D. One year - ANSWER: B. One week Which auxiliary trial lens will extend the keratometer range to approximately 61.00 D? A. -1.25 D B. +1.25 D C. -1.50 D D. +1.50 D - ANSWER: B. +1.25 D Wearing lenses in high altitudes and dry environments may result in complaints of all but the following A. Photophobia B. Chalazion C. Grittiness D. Burning sensation - ANSWER: B. Chalazion The first line of defense in the protective system of the eye is formed by the A. Sebaceous glands B. Lacrimal glands C. Eyelids D. Caruncle and semilunar folds - ANSWER: C. Eyelids 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 In against-the-rule astigmatism, the steepest corneal meridian A. Is at or near 180 B. Is at or near 135 C. Is at or near 90 D. Is at or near 45 - ANSWER: A. Is at or near 180 An inability to bring all of the keraometer mires into focus at the same time may indicate A. With-the-rule astigmatism B. Against-the-rule astigmatism C. Irregular astigmatism D. Oblique astigmatism - ANSWER: C. Irregular astigmatism In an alignment lid attachment GP fit, the fluorescein pattern should show A. Apical clearance and 360 degrees of bearing in the mid-periphery B. A thin, even layer of fluorescein and less than 180 degrees of bearing in the mid-periphery C. Apical bearing and tear pooling inferiorly D. Apical bearing and maximum edge lift - ANSWER: B. A thin, even layer of fluorescein and less than 180 degrees of bearing in the mid-periphery In a GP wearer, an 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 sensitivity - ANSWER: C. Poorly blended secondary curves In a Schirmer I Test A. The patient should produce sufficient tears to saturate the paper strip in three 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 break-up time D. A patient with an anaesthetized eye and normal tear output should wet at least 15mm of the filter paper in 5 minutes - ANSWER: D. A patient with an anaesthetized eye and normal tear output should wet at least 15mm of the filter paper in 5 minutes The most powerful refracting surface of the eye is the A. Retina B. Cornea C. Crystalline lens D. Ciliary muscle - ANSWER: B. Cornea Which keratometer reading indicates with-the-rule astigmatism? A. 45.00 @ 175 / 44.50 @ 085 B. 48.00 @ 045 / 46.50 @ 135 C. 44.50 @ 015 / 44.75 @ 105 D. 46.00 @ 180 / 46.00 @ 090 - ANSWER: C. 44.50 @ 015 / 44.75 @ 105 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 D. The patient is seated at the keratometer, fluorescein is instilled in the eye and the patient is told to blink to spread the fluorescein evenly across the cornea before timing is begun - ANSWER: C. A break-up time of less than 10 seconds may preclude success with contact lenses The preservative in contact lens solutions A. Must demonstrate efficacy in killing bacterial, viral, and fungal microorganisms B. Is usually a mercury compound such as thimerosal C. Must kill all microorganisms on a contact lens in a 4-hour soak period

D. Is formulated to keep microorganisms from multiplying in a bottle of a contact lens solution after it has been opened - ANSWER: D. Is formulated to keep microorganisms from multiplying in a bottle of a contact lens solution after it has been opened Results of a refraction show a patient to see best at distance with a power of +1.25 +1.00 x 095 and at near with a power of +2.50 +1.00 x 095. What is the "add" power? A. +1.25 D B. -1.25 D C. +1.75 D D. +1.25 +1.00 x 095 - ANSWER: A +1.25 D A pre-presbyopic myopic patient who is still able to read with single vision glasses may find that A. They are unable top see fine print when fit with contact lenses B. If the vertex distance is reduced, near vision will be clearer C. Monovision is impossible to adapt to D. It is even more difficult to see the computer than to read with contact lenses that contain their distance prescription - ANSWER: A. They are unable top 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. +8.00 D B. +8.50 D C. +9.50 D D. +11.00 D - ANSWER: C. +9. Which of the following choices would work best for the patient's visual need given the following information K's 44.00 @ 180 / 45.25 @ 090 RX -3.00 +0.25 x 090 A. GP lens 45. B. GP lens with toric posterior curves

C. Soft toric lens D. Spherical soft lens - ANSWER: D. Spherical soft lens Which of the following set of lens specifications would best simulate an intrapalpebral GP fitting given the following information K's 42.00 @ 180 / 43.00 @ 090 RX -2.00 -1.00 x 180 A. 42.50 -2.50 8. B. 41.50 -1.50 8. C. 42.00 -2.00 9. D. 41.50 -1.50 9.5 - ANSWER: A. 42.50 -2.50 8. Which contact lens would be best correct this patient's visual needs, given the following information K's 46.00 @ 180 / 45.50 @ 090 RX -3.00 -1.50 x 090 A. A soft spherical lens B. A soft toric lens C. A back surface toric GP lens D. A front surface toric GP lens - ANSWER: B. A soft toric lens The average HVID for a patient is A. 15 seconds B. 44.00 diopters C. 11.5mm D. 0.9% - ANSWER: C. 11.5mm If a patient has 1.50 D of refractive cylinder and keraometer readings of 44.00 @ 180 / 44.50 @ 090, you would expect a spherical gas permeable lens to A. Give them their best correctable vision

B. Result in residual astigmatism C. Ride nasally D. Ride temporally - ANSWER: B. Result in residual astigmatism Application of fluorescein should be used in which of the following situations? A. Evaluation of gas permeable lens fit B. Evaluation of soft contact lens parameters C. Evaluation of vascularization of the cornea D. Evaluation of gas permeable lens over-refraction - ANSWER: A. Evaluation of gas permeable lens fit If the diagnostic gas permeable lens placed on the eye results in minimal movement, which of the following will increase the movement on the lens ordered for the patient? A. Decreasing overall lens diameter B. Increasing overall lens diameter C. Increasing optic zone diameter D. Increasing sagittal depth - ANSWER: A. Decreasing overall lens diameter Contact lens technicians work with prescriptions in minus cylinder form because A. The lacrimal lens is a minus cylinder lens B. Spectacle lenses are made in minus cylinder form C. Most phoropters contain only minus cylinders D. Minus cylinders make it easier to perform retinoscopy - ANSWER: A. The lacrimal lens is a minus cylinder lens Rx OU -3.00-0.50 x 180, Add +1.25 D. If spherical soft lenses are being fit using the monovision technique, what is the desired power for the eye fitted for near? A. -2. B. -3. C. +1. D. -1.75 -0.50 x 180 - ANSWER: A. -2.

Which of the following lens designs would provide the best visual result for this patient? K's 43.00 @ 180 / 46.00 @ 090 RX -3. A. Soft toric lens B. Spherical GP lens with increased center thickness C. Truncated GP lens D. Soft spherical lens - ANSWER: D. Soft spherical lens Which edge design is recommended for a +15.00 D aphakic GP lens? A. Hyperflange B. Lenticular myoflange C. Concentric design D. Intrapalpebral design - ANSWER: B. Lenticular myoflange Which of the following lens design would provide the best visual result for this patient? K's 42.00 @ 180 / 42.50 @ 090 RX -3.50 -1.75 x 180 A. Spherical GP lens B. Spherical soft lens C. Soft toric lens D. Back surface toric GP lens - ANSWER: C. Soft toric lens What Rx would be ordered for a gas permeable lens fit on K? K's 43.00 @ 180 / 44.00 @ 90 Rx -3.00+1.00 x 090 A. -1.00 D B. -2.00 D C. -3.00 D

D. -4.00 D - ANSWER: B. -2.00 D

To aid in the positioning of a GP prism ballast lens riding too low and slipping underneath the lower lid, which of the following might be helpful? A. Hyperflange B. More prism C. Truncation D. Thinner edge design - ANSWER: C. Truncation The following GP diagnostic lens is placed on a patient's eye 43.50 -2.00 9. An over-refraction is performed with the following results: plano +1.50 x 095 Which of the following lens parameters would you order for the patient? A. 43.50 -0.50 -1.50 x 005 9. B. 43.50 -2.00 -1.50 x 005 9. C. 43.50 plano -1.50 x 095 9. D. 43.50 plano +1.50 x 005 9.2 - ANSWER: A. 43.50 -0.50 -1.50 x 005 9. The following soft lens is placed on a patients eye: 8.8 -4.00 14. An over-refraction is performed resulting in -0.75 sphere. Which of the following lens parameters would you order for the patient? A. 8.8 -3.25 14. B. 8.8 -4.00 14. C. 8.8 -4.75 14. D. 8.8 -5.25 14.0 - ANSWER: C. 8.8 -4.75 14. In a GP lens, a poorly finished transitional zone between the optic zone and the lens edge can be evaluated by: A. Radiuscope

B. Lensometer C. Profile analyzer D. Contacto gauge - ANSWER: C. Profile analyzer During the diagnostic evaluation of the following patient you observe that the lens rotates 10 degrees to the right. Which of the following lens parameters would you order for the patient? Patient's Refract: -2.50 -1.00 x 170 Diagnostic lens: 8.7 -2.50 -1.00 x 170 A. 8.7 -2.50 -1.00 x 160 B. 8.7 -2.50 -1.00 x 170 C. 8.7 -2.50 -1.00 x 180 D. 8.7 -2.50 -1.00 x 010 - ANSWER: A. 8.7 -2.50 -1.00 x 160 Which of the following lens designs would not provide a good visual result for this patient? K's 42.50 @ 180 / 44.00 @ 090 RX -2.50 +1.50 x 090 A. Soft toric lens B. Soft spherical lens C. Spherical GP lens D. Aspheric GP lens - ANSWER: B. Soft spherical lens In prescriptions of 4.00 D or greater, fitting contact lenses requires compensating the power for the change in vertex distance. When moving from the spectacle plane to the corneal plane, the compensated power will be: A. More plus B. More minus C. More plus for plus lenses only D. More minus for plus lenses only - ANSWER: A. More plus A prism ballast GP lens requires how much prism for proper orientation?

A. 0.75 to 1.50 D B. +3.00 D at 6 o'clock C. 1.50 to 3.00 D D. Always 0.75 D - ANSWER: A. 0.75 to 1.50 D The longer the radius of curvature of a contact lens A. The steeper the lens B. The flatter the lens C. The large the diameter D. The smaller the diameter - ANSWER: B. The flatter the lens The following soft lens is placed on a patient's eye: 8.4 -2.00 14. An over-refraction is performed with he following results: -1.00 -.050 x 174 Which of the following lens parameters would you order for the patient? A. 8.4 -2.00 14. B. 8.4 -2.75 14. C. 8.4 -3.25 14. D. 8.4 -3.7514.2 - ANSWER: C. 8.4 -3.25 14. Given the following information K's 45.00 @ 180 / 44.00 @ 090 RX -3.00 +1.00 x 180 Upper lid positioned at superior limbus. Which of the following set of lens specifications would best simulate an intrapalpebral GP lens fit? A. 43.50 -1.50 8. B. 43.50 -1.50 9. C. 43.50 -2.00 8.

D. 43.50 -2.50 8.5 - ANSWER: D. 43.50 -2.50 8.

Given the following information, which set of lens specifications would be best to simulate a lid attachment rigid lens fitting? K's 42.00 @ 180 / 43.00 @ 090 RX -2.00 -0.87 x 180 Upper lid positioned 2mm below the superior limbus A. 41.50 -1.50 9. B. 42.50 -2.50 805 C. 43.00 -2.50 9. D. 43.00 -3.00 8.2 - ANSWER: A. 41.50 -1.50 9. Which of the following bifocal designs represents a translating design? A. Diffraction design B. Cresent design C. Aspheric D. Concentric design - ANSWER: B. Cresent design Given the following information, which of the listed rigid lens designs would you order to best correct this wearer's vision? K's 42.00 @ 180 / 45.00 @ 090 RX -3.00 -2.75 x 180 A. 42.00 / 45.00 -3.00 -2.25 (RX form) B. 42.00 -3.00 -2.75 x 177 prism C. 42.00 -3. D. 45.00 -3.00 - ANSWER: A. 42.00 / 45.00 -3.00 -2.25 (RX form) Up until the recent introduction of silicone hydrogel lenses the Dk/t of previous hydrogel lenses was limited by A. Water content and center thickness

B. Ionic materials and water content C. Non-ionic materials and water content D. Oxygen permeability and wetting angle - ANSWER: A. Water content and center thickness Given the following information, which of the following GP lens designs would you order to best correct this patient's vision? K's 45.00 @ 180 / 42.00 @ 090 RX -2.00 -4.25 x 090 A. 45.00 -2. B. 42.00 -2.00 -4.25 x 090 prism ballast C. 42.00 -2. D. 42.00 / 45.00 -2.00/-6.25 (drum readings) - ANSWER: D. 42.00 / 45.00 -2.00/-6.25 (drum readings) Given the following information, which of the following GP lens designs will best correct this wearer's vision? K's 42.50 @ 180 / 42.50 @ 090 RX -3.00 -1.00 x 090 A. Bitoric design B. Anterior toric design C. Spherical design D. Soper cne design - ANSWER: B. Anterior toric design Given the following refraction and K readings, select the correct base curve and power recordings (drum readings) K's 44.00 @ 180 / 41.00 @ 090 RX -1.00 -3.00 x 090 A. 41.00 / 44.00 -1.00/-3. B. 41.00 / 44.00 -1.00/-4. C. 41.00 / 44.00 -4.00/-1. D. 44.00 / 41.00 -1.00/-3.00 - ANSWER: B. 41.00 / 44.00 -1.00/-4.

Fitting soft lenses steeper than K will usually result in A. Good lens movement B. A minus tear layer under the lens C. Fluctuations in vision following the blink D. Good apical contact - ANSWER: C. Fluctuations in vision following the blink A bifocal lens in which the power gradually changes from the central area of the lens to a periphery is known as A. An aspheric lens B. A juxtapositioned lens C. A monocentric lens D. A cresent lens - ANSWER: A. An aspheric lens How many diopters of power will bring parallel rays of incident light to focus at a distance of one meter? A. One diotper B. Two diopters C. Four diopters D. Ten diopters - ANSWER: A. One diotper The patient has a horizontal visible iris diameter (HVID) of 12.5mm. The best choice for initial soft lens diameter would be A. 13.0mm B. 13.5mm C. 14.5mm D. 15.5mm - ANSWER: C. 14.5mm In which of the following types of corneal astigmatism is a GP lens most indicated? A. Irregular

B. With-the-rule C. Against-the-rule D. Oblique - ANSWER: A. Irregular Spherical equivalent powers position which of the following on the retina? A. Focal plane of the most minus B. Point focus C. Focal plane of the most plus meridian D. Circle of least confusion - ANSWER: D. Circle of least confusion Keratoconus and penetrating keratoplasty fittings are best accomplished by which of the following methods? A. Nomogram B. K's and RX C. Diagnostic fitting D. Molded impression - ANSWER: C. Diagnostic fitting The following ametropia frequently results in high riding rigid lenses A. High myopia B. High hyperopia C. Aphakia D. Presbyopia - ANSWER: A. High myopia A good example of a bifocal contact lens that may rotate without vision impairment is A. Aspheric B. Executive C. Fused crescent D. Translating - ANSWER: A. Aspheric

A toric soft lens will correct A. Residual astigmatism B. Moderate astigmatism (greater than 2.00 D) C. Low astigmatism D. All of the above - ANSWER: D. All of the above In calculating the prescription for a rigid lens, one must A. First transpose the patient's prescription into plus cylinder form B. First transpose the patient's prescription into minus cylinder form C. Base the contact lens power on the spherical equivalent D. Remember to add minus power to the lens to compensate for a negative tear film - ANSWER: B. First transpose the patient's prescription into minus cylinder form Therapeutic soft lenses should be fit with minimal movement in which case? A. Keratitis sicca B. Trichiasis C. Recurrent erosion D. Keratoconus - ANSWER: C. Recurrent erosion A rigid lens corrects astigmatism by A. Flattening the corneal apex B. Neutralizing the corneal astigmatism with lenticular astigmatism C. Flexing just enough to compensate for the patient's astigmatism D. Forming a new spherical refracting surface in front of the cornea - ANSWER: D. Forming a new spherical refracting surface in front of the cornea Which of the following is a translating bifocal lens design? A. Concentric B. Aspheric

C. Diffractive D. Segmented - ANSWER: D. Segmented Prism ballast, double slab-off and peri-ballast are all what type of lens design? A. Soft toric B. Bifocal C. Therapeutic D. Spherical - ANSWER: A. Soft toric Which of the following are two methods of stabilizing the rotation of rigid bifocal contact lenses? A. Back surface toric and front surface toric B. Weights and measures C. Alternating and translating D. Truncation and prism ballast - ANSWER: D. Truncation and prism ballast K's 42.00 @ 170 / 43.00 @ 080 RX -3.00 -1.00 x 170 Given the RX and K's, the following diagnostic toric soft lens was used: 8.8 -3.00 -1.00 x 180 During the diagnostic evaluation the observer notes the lens rotated 10 degrees clockwise. The lens ordered should have an axis of A. 10 degrees B. 160 degrees C. 170 degrees D. 180 degrees - ANSWER: D. 180 degrees The FDA classification for "disposable lenses" means A. The lens is disposed of after removal B. The lens is disposed of after one week C. The lens is disposed of after two weeks

D. The lens is to be disposed of after one month - ANSWER: A. The lens is disposed of after removal Given the following information K's 42.00 @ 180 / 42.00 @ 090 RX -3.00 -2.00 x 180 A. A back surface toric GP lens will probably be necessary to archive optimum visual acuity B. A bitoric GP lens will probably be necessary to achieve optimum visual acuity C. A soft spherical lens will provide the best fit and visual acuity because the patient has residual astigmatism D. A front surface toric GP lens will probably be necessary top correct the patient's residual astigmatism - ANSWER: D. A front surface toric GP lens will probably be necessary top correct the patient's residual astigmatism A patient's K reading are 43.50 @ 180 / 41.50 @ 090. A spherical GP lens can be expected to A. Displace down and in, or down and out with each blink B. Position under the upper lid to provide a superior lid attachment, alignment fit C. Lock on to the cornea nasally or temporally D. Establish a fulcrum at 3 and 9 o'clock in the horizontal meridian - ANSWER: A. Displace down and in, or down and out with each blink Which special GP lens design would be beneficial for this patient given the following information? K's 44.00 @ 180 / 46.50 @ 090 Rx -11.00 +2.50 x 090 A. Hyperflange B. Back toric design C. Thick edge design D. Myoflange - ANSWER: A. Hyperflange During the diagnostic evaluation of the following patient you note the lens rotates 10 degrees to your left. Which of the following lens parameters would you order for the patient?

Patient's refraction -3.00 -1.25 x 160 Diagnostic Lens 8.4 -3.00 -.125 x 180 14.5 A. 8.4 -.300 -1.25 x 160 14.5 B. 8.4 -.300 -1.25 x 170 14.5 C. 8.4 -.300 -1.25 x 180 14.5 D. 8.4 -.300 -1.25 x 010 14.5 - ANSWER: B. 8.4 -.300 -1.25 x 170 14.5 A patient is diagnostically fit with gas permeable lens with the following parameters: 42.50 -3.00 9.5. If you wish to flatten the lens to cornea relationship, which of the following lenses would you order? A. 42.00 -2.50 10.0 B. 42.50 -3.00 9.0 C. 43.00 -3.50 9.5 D. 43.50 -3.50 9.0 - ANSWER: B. 42.50 -3.00 9.0 When are soft lenses contraindicated? A. When the patient has cylindrical keratometric readings B. When the patient has more than 1.50D of refractive cylinder C. When the patient has Graves' disease D. When the patient has irregular corneal astigmatism - ANSWER: D. When the patient has irregular corneal astigmatism The tolerance for the overall lens diameter according to the ANSI standards is A. +/- 0.005mm B. +/- 0.05mm C. +/- 0.01mm D. +/- 0.1mm - ANSWER: B. +/- 0.05mm All of the following will enable the practitioner to verify the overall gas permeable lens diameter except A. Slot gauge