If the manufacturers guidelines suggest a minimum of four hours for disinfection what would you suggest to the patient

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Question	Answer
What term refers to sensitivity to light	Photophobia
The following is an example of what type of astigmatism K's 42.50@180/40.50@90	Against the rule astigmatism
What medication they affect successful contact lens wear	Antihistamines
The cornea receives nutrients from what	Limbal blood vessels
The increased loss of ability of the crystalline lens to accommodate is called	Presbyopia
What instrument can provide simultaneous information about the cornea, lids, conjunctiva, lashes, contact lens surface and fit	Slit lamp
The pre-corneal tear film is composed of three layers what are they	Lipid, aqueous, mucin
Transpose the following Rx -4.50 +1.25 x 94	-3.25 -1.25 x 4
The average pH value of the human tear is	7.4
If the manufacturers guidelines suggest a minimum of four hours for disinfection what would you suggest to the patient	A minimum of four hours is required
The main supply of oxygen to the corneal epithelium is derived from the	Tear film
What is the term for the condition in which there is a loss of vision without any apparent disease to the eye	Amblyopia
Which auxiliary trial lens will extend the keratometer to approximately 30.00D	-1.00
Which step should be performed first when taking Keratometer measurements	Focus the eyepiece
The following is an example of what type of astigmatism 44.00@180/44.50@90	Lenticular astigmatism
What are ocular signs of aging	Tear film abnormalities, reduced with elasticity, lens opacites, loss of accommodation
Transpose the following RX and two minus cylinder form +1.50 +1.00 x 75	+2.50 -1.00 x 165
The pre-corneal tear film provides what	A smooth optical surface and metabolic nutrients to the epithelium
Name the five cornea layers in order from front to back	Epithelium, Bowmans membrane, stroma, decrement a 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	Endothelium
A normal tier break up time is what	10-12 seconds
A whitish Hayes in the peripheral corneal stroma which does not stain and is often seen in the elderly is known as	Arcus senilus
Patients with keratitis sicca are more prone too	Secondary infection
Upon removal of the crystalline when's the patient is	Aphakic
The following rx represents OD +2.00 = 20/20 OS -3.00 -2.00 x 180 = 20/20	Anisometropia
OD +2.00 = 20/20 OS -3.00 -2.00 x 180 = 20/20 The above patient will best achieve stereopsis with which of the following modalities	Contact lens
Tom spectacles with a power of -12.00+.50Ã96 sits 10mn in front of his cornea the likely soft contact lens prescription for Tom would be what	-10.50
The Keratometer is a instrument used to measure	Corneal curvature
An instrument used to evaluate corneal irregularity by reflecting concentric circles from the patients cornea is called	Placido disk
What auxiliary trial ends will extend the keratometer to approximately 61.00D	+1.25
Wearing lenses in high altitude's and dry environments may result in complaints in all areas except photophobia, grittiness, burning sensation, chalazion	Chalazion
Patients with which of the following occupations can successfully wear contact lenses Arc welder, teacher, firefighters, all of the above	All of the above
Transient keratometric mire distortion is usually due to what	Irregular corneal astigmatism
In against the rule astigmatism the steepest corneal Meridian is	Is at or near 180Â°
Irregular mires on a keratometer maybe indicative of	Dry eye or excessive mucoid secretion Contact lens induced corneal warpage Keratoconus
In an alignment lid attachments RGP fit the fluorescein pattern should show	A thin even layer of fluorescein in less than 180Â° of bearing in the mid-periphery
In a RGP wearer, an acute stain on the cornea may be due to	Poorly blended secondary curves
What is schirmer I test	A patient with an unanestgetized eye and normal tear output should wet at least 15 mm of the filter paper in five minutes
What is schirmer II test	And Anesthetic drop is instilled before the schirmer strip is inserted to eliminate the reflex tearing caused by the filter paper
Rose bengal testing	Will stain devitalize conjunctival epithelial cells brightly
When evaluating tear film break up time	A break up time of less than 10 seconds may preclude success with contact lenses
The preservative in contact lens solution does what	It is formulated to keep micro organisms from multiplying in a bottle of contact lens solution after it is opened
A patient wearing a high horizontal prismatic correction for motility problem	May experience diplopia when fit with contact lenses
A pre-presbyopia myopic patient who is still able to read with single vision glasses may find that	They are unable to see fine print when wearing contacts
Amy's +8.50 D spectacles sit at 12mm from the cornea. The power of a soft contact lens dory Amy. Properly vertex would be	+9.50
What would work best for this patients visual needs, given the following information K's 42.00@180/43.00@90 -2.00 -1.00 x 180	Spherical soft lens
Which of the following set of lens specifications would beat simulate and intrapalpebral RPG fitting given the following information 42.00@180/43.00@90 -2.00 -1.00 x 180 Upper lid positions 2 mm above the superior limbus	42.50 -2.50 8.5
Which contact lens would beat correct this patients visual needs given the following information 46.00@180/44.50@90 -3.00 -1.50 x 90	A soft toric lens
What contact lens material components has the highest gas permeability	Silicone
When documenting in a pts chart on a new fitting recheck what is not necessary	Sisters lens type that caused her problems
Application of fluorescein should be used in what situation	Evaluation of a rigid gas permeable lens fit
If the diagnostic rigid gas permeable lens placed on the eye results in minimal movement what would increase the movement on the lens ordered for the patient	Decreasing lens diameter
If a soft contact lens decenters laterally exposing a portion of the patients limbus what change in perimeter would improve the situation	Decreasing the lens diameter
When evaluating a diagnostic soft lens on a patient, you notice that movement is sluggish after only a few minutes which of the following changes would you make to the lens that are ordered for the patient	Flatten the base curve
Which of the following lens designs would provide the best visual result for this patient 43.00 @ 180 / 46.00 @ 90 -3.00 Sphere	Soft spherical lens
Which edge design is recommended for 8+15.00 D aphakic RGP lens	Lenticular myoflange
Which of the following lens design would provide the best visual result for this patient 42.00 @ 180/ 42.50 @ 90 -3.50 -1.75 x 180	Soft toric lens
What are X would be ordered for a rigid gas permeable lenses fit "on K" 43.00 @ 180 / 44.00 @ 90 -3.00 +1.00 x 90	-2.00
To aid in positioning of a rigid prism Ballast Lens riding to low and slipping underneath the lower lid, what might be helpful	Truncation
The following rigid gas permeable diagnostic lens is placed on a patient I 43.50 -2.00 9.2 In over-refraction is performed with the following result Plano +1.50 x 95 what lens parameters would you order for the patient	43.50 -0.50 -1.50 x 5 9.2
The following soft lenses placed on a patient I 8.8 -4.00 14.0 and over re-fraction is performed resulting in -0.75D sphere what lens parameter would you order for the patient	8.8 -4.75 14.0
In an RGP lens A poorly finished transitional zone between the optic zone in the lens edge can be evaluated by....	Profile analyzer
During the diagnostic a valuation of the following patient the lens rotates 10Â° to the right which of the following lens parameters would you order for the patient Refraction -2.50 -1.00 x 170 Lens. 8.7 -2.50. -1.00 x 170	8.7 -2.50 -1.00 x 160
What lens designs would not provide a good visual result for this patient 42.50 @ 180 / 44.00. @ 90 -2.50 +1.50 x 90	Soft spherical lens
What is an excellent material for a patient with keratoconus	Fluoro silicone acrylic
A prism ballast RGP Lens requires how much prism for proper orientation	0.75 to 1.50 D
What could be considered in the fitting of a Keratoconus patient	Aspheric, McGuire, Soper They are all different types of lenses
The following soft lens is placed on a patient I 8.4 -2.00 14.2 And over refraction is performed with the following results -1.00 -0.50 x 174 What parameters would you order for the patient	8.4 -3.25 14.2
Given the following information K's 45.00 @ 180/ 44.00 @ 90 Rx -3.00 +1.00 x 180 upper lid positioned at the superior limbus what lens specification would best simulate an intrapalpebral rigid lens fit	44.50 -2.50 8.5
Given the following information which of the lens specification would best simulate a lid attachment rigid lens fitting 42.00@180/43.00@90 -2.00 -0.87 x 180 upper lid positioned 2 MM below the superior limbus	41.50 -1.50 9.5
What bifocal designs represents a translating design	Crescent design
Giving the following information which of the listed rigid lens designs would you order to best correct the wearers vision 42.00@180/45.00@90 -3.00 -2.25 x 180	42.00/45.00 -3.00 -2.25. (Rx form)
The performance of a soft toric lens depends on	Corneal topography, Lid shape, lid positioning and lid tightness
Given the following information which of the following RGP lens designs would you order to best correct the patient's vision 45.00@180/42.00@90 -2.00 -4.25 x 90	42.00/45.00 -2.00/-5.75 (drum reading)
Given the following information which of the following RGP lens designs will best correct the wearers vision 42.50@180/42.50@90 -3.00 -1.00 x 90	Anterior toric design
Given the following refraction and K readings, select the correct base curve and power recordings (drum readings) 44.00@180/41.00@90 -1.00 -3.00 x 90	41.00/44.00 -1.00 -3.00
what is not necessary to consider when fitting RGP aphakic contact lenses	Hyperflange design
A bifocal lens in which the power gradually changes from the central area of the lens to the periphery is known as	An aspheric lens
An aphakic patient with K readings of 40.50@180/41.25@90, large palpebral fissures and flaccid lower Lids is a good candidate for	A single cut lens
A patient has a horizontal visible iris diameter (HVID) 12.5 MM the best choice for initial soft lens diameter would be....	14.5
A single cut aphakic Lens is best suited for patients with _________ apertures and _________ corneas	Small/steep
Where is the power curve on a Spin-cast soft lens	The back surface
Keratoconus and penetrating keratoplasty fittings are best accomplished by which of the following methods	Diagnostic fitting
The following ametropia frequently results in high riding rigid lens	High myopia
A good example of a bifocal contact lens that may rotate without vision impairment is	Aspheric
A toric soft lens will correct.....	Residual astigmatism, low astigmatism (0.75-2.00), and moderate astigmatism (greater the 2.00 D)
A lens fitted for Keratoconus should	Align the apex
The best option for patients with giant papillary conjunctivitis (GPC) or those who are cooks or hairdressers is	Disposable lenses for daily wear only
Which of the following is a translating bifocal lens design	Segmented
Prism ballast, double slab off, and peri-ballast are what type of lens designs	Soft toric lenses
What is the general rule of thumb when choosing a diameter of a soft lens	2.0 mm larger than the HVID
Therapeutic soft lenses should be fit with minimal movement in which case	Recurrent erosion
42.00@170/43.00@80 -3.00 -1.00 x 170 Given the above RX the following diagnostic toric lens was used -3.00 -1.00 x 180 During the diagnostic evaluation the above lens rotates 10Â° clockwise the lens ordered should have an axis of	180Â°
Fluoro-silicone acrylic material have __________ qualities that enable patient to blink protein and other deposits off the qualities that enable patient to blink protein and other deposits off the land surface	Non-stick
42.00@180/42.00@90 -3.00 -2.00 x 180 What is the best lens type for this patient	A front surface toric RGP lens will probably be necessary to correct this patient's residual astigmatism
A patient's K readings are 43.50@180/41.50@90 What can you expect from a spherical RGP lens	Displace down and in or down and out with each blink
Which special RGP lens design would be beneficial for this patient given the following information 44.00@180/46.50@90 -11.00 +2.50 x 90	Hyperflange reduces the edge thickness of a high minus lens increasing patient comfort inn allowing the lens just center better
During the diagnostic evaluation of the following patient the lens rotates 10Â° to the left which of the following Lens parameters would you order for the patient -3.00 -1.25 x 160 (pt refraction) 8.4 -3.00 -1.25 x 180 14.5	-3.00 -1.25 x 170 14.5
A patient is diagnostically fit with a rigid gas permeable lenses with the following parameters 42.50 -3.00 9.5. If you wish to flatten the lens to cornea relationship what lens would you order	42.50 -3.00 9.0
Contact lenses are most often specified in	Back vertex power
The tolerance for the overall lens diameter according to the ANSI standard is	+\- 0.05
Name an instrument that will not enable the practitioner to verify the overall rigid gas permeable lens diameter	Radiuscope
Placing the concave side of a rigid gas permeable lenses against the lens stop of the lensometer will provide you with what	Back vertex power
An instrument that allows simultaneous verification of lens diameter, optic zone width and Peripheral curve width is	Measuring magnifier
Assessment of the quality of the Peripheral curves (blends) of a rigid contact lens is achieved by the use of	Profile analyzer
The instrument used for magnification of the edge of a rigid contact lens is	Shadowgraph
The tolerance for lens power under +\- 10.00D is	0.12
A warped lens will show _______ base curve(s) on the radiuscope and a __________ power on the lensometer	2 base curves and a spherical lens
What instrument does not measure contact lens parameters	Burton lamp
Prolonged periods of reading in contact lenses may lead to lens discomfort why	Decreased blinking
How often should new soft lens fits be seen	After one week again after one month three months and six months from the time of their initial fit then every 6 to 12 months
What material would least likely require a weekly enzymatic cleaner	Polymethylmethacrylate PMMA
What type of lens would best satisfy this patient's visual needs given the following information 43.00@180/44.00@75 3+ distortion -2.00 +1.00 x 75	Spherical RGP lens due to the 3+ distortion probably because of irregular astigmatism
A rigid contact lens measures +15.00 BVP, the FVP will measure	A lesser dioptric reading. The power of a high plus lens will always measure a larger numerical value in the back vertex power (BVP) when compared to the reading in the front vertex power (FVP)
Which of the following preservatives have a low incidence of ocular sensitivity with Soft contact lens	Sorbic acid
Patients who are fit with lenses that will be worn overnight on a flexible or extended wear basis should	Should be seen as early as possible in the morning for follow-up of overnight wear
The base curve of a rigid lens was ordered 7.84 mm and was received measuring 7.94 mm this lens is ___________ than ordered	0.50 D flatter
One my utilize which of the following lens designs given the following information 46.00@75/48.50@165 2+distortion -7.00 -3.50 x 165	Soper Keratoconus design
Select the power if the lenses ordered 1/2 D steeper than the K 42.50@180/44.50@90 -3.50 -2.50 x 90	-4.00 D
The FDA has recommended the extended wear contact lenses should be worn for a maximum of	7 days
What preservatives is a mercury based compound	Thimerosal, an organic Mercurial compound
Carol's contact lenses are fit on black K. Her reflection is -5.00 +2.00 x 90 what's the power of her contact lenses	-3.00
When verifying a rigid lens on a radiuscope you notice that the mires are not in focus in all principal meridians, what does this indicate	Warped lens, back toric lens, bi-toric lens
What may cause a soft lens to need to be replaced more often	Heat disinfection
Name a preservative found in soft contact lens solutions	Polyquad
What hobbies and activities should be discussed with patients	Long periods of computer work, long periods of reading, and long periods of driving
Conventional daily wear soft contact lens this properly care for should be replaced at least	Yearly, this is different than disposable or frequent replacement counterparts
What are nonapproved wedding solution	Saliva, toothpaste, dish soap. You should only use approved wedding solution for contacts
Which medications should not be used with soft contact lens is as it will turn the lenses brown	Epinephrine
What should a patient do if they contact lens becomes adherent to the cornea	Irrigate the eye with saline or rewetting drops until the lens begins to move freely again
Poor RGP insertion or recentering techniques may result in what	Arcuate staining
When can Johnny a 12-year-old new soft lens wear comfortably be sent home with new lenses	When he can insert and remove the lens is by himself
What is the purpose of a combination wedding/soaking RGP solution	Maintain lens surface wettability, Cushion the lens during insertion, disinfect the lens
Enzymatic cleaning of soft lenses is important because....	Preventing the development of GPC, maintaining hydration of the lens, preventing the lens from shrinking and tightening
And how often should eyeliner and mascara be replaced	Every 3 to 6 months to avoid contamination
What is not considered a normal adaptive response to soft lenses	Lens feeling hot in the late afternoon
Thermal disinfection of soft lens	Is effective against acanthamoeba cysts, and trophozoites
What should you do with your solution container after use	Always make sure it is captain to prevent contamination
Hydrogen peroxide Care systems	Is more affective against viruses and fungi agianst most chemical disinfection systems
What cannot be used to measure the diameter of a rigid lens	Profile analyzer
Use of a wretten #12 or ridden yellow filter is important in evaluating fluorescein pattern of patients with RGP lens because	Many patients are wearing lenses containing UV inhibitors that block fluorescein
If fluorescein evaluation reveals apical staining it could be due to	A lens that is to flatten loose, a lens that is too steep and tight, or corneal edema
Newly fitted extended where patients should have their first recheck when	24 hours
If an adapted contact lens wear complains of a sudden onset of discomfort the technician should suspect	A damaged contact lens
If an RGP lens fails to provide acceptable visual acuity the fitter should do what first	Have a sphero-cylindrical over refraction performed to see if the reduced acuity is due to residual astigmatism
According to the FDA disposable contact lenses that are removed nightly should be discarded after	2 weeks
Three and 9 o'clock staining in RGP lens wearers can best be eliminated by	Reduce center and edge thickness and teaching the patient to blink completely
Circumcorneal injection in a soft lens wearers may be a sign of	Tight lens syndrome Solution sensitivity Keratitis
A technician can perform a preliminary evaluation of a soft contact lens movement by....	Observing the movement of the lens edge in relation to the position of the conjunctival vessel, having the patient look up and blink, observing movement and lens lag in upward and lateral gaze with a penlight
What is not true about contact lens movement	A loose lens will be more comfortable than a tight lines
What RGP Modification cannot be made in the office	Changing the base curve
What is not a benefit of polishing the lens in the office	Thinner lens edge
What is the most important feature of an in-office modification unit	Variable speed motor
If a patient with exophthalmic eyes due to thyroid disease requires a toric lens....	It may dehydrate excessively due to the lid retraction and dry eye condition that often accompanies thyroid disease, stability will be difficult to maintain since there are no lid forces to keep the lens in position
What is not a characteristic of corneal Edema	Peripheral flare
What tools do you use when blending peripheral curves in the office	Radius tools, polishing compound, suction cups or a spinner two
A slit lamp illumination that gives overall view of the cornea but limits detail is	Diffuse slit lamp
When keratometric mires reflected off a soft contact lens are only clear when the where blinks the lens fit is to	Steep
Gross corneal Edema which manifests itself clinically as Central corneal haze is verified by the slitlamp using sclerotic illumination, what specific technique does the examiner use to see this condition	The naked eye and an angle between the slitlamp beam in the eye of 90Â°
When inspecting the blend on the bevel of a RGP lens	And I deal blend should show a J shaped or ski pattern in a smooth curve
Diffuse central punctate staining is an indication of	Tight lens
Sandy returns to your office after being fit with soft contact lens. She has complaints that the lenses become uncomfortable and burning as the day progresses what might be the reason	The lens is too tight
With a rigid contact lens in place a fluorescein pattern shows a concentration of Fluorescein inferiorly and superiorly beneath the lens. Which of the following types of astigmatism is represented by this pattern	With the rule astigmatism
Mary is wearing a rigid gas permeable lenses with a base curve of 43.50 D And a power of +2.75. She requires a -0.75 sphere over this Lens if you wish to order her a new lens with a base curve 43.00 what would the new power be	+2.50
FDA group I soft lenses	Low-water content less than 50% and a non-ionic service
What type of slit lamp illumination will allow you to determine corneal thickening, thinning and distortion and depth of foreign bodies or opacites in the cornea	Optic section
A soft lens has edge lift when observed on the cornea how can this be corrected	Steepen The base curve
Corneal Edema is observed inferiorly under a prism ballast toric lens what is the probable cause	Prism thickness is too great
In evaluating a soft lens with either ketatometry mires or retinoscopic reflex, you detect distortion immediately after the blank followed by clear mires, this is caused by what	A flat fitting lens
FDA group IV lens is?	Negative charged surface that attracts positively charged tear film, proteins and lipids
Which type of slitlamp illumination is used for observing tear break up time	Diffuse illumination
A non-wedding rigid gas permeable lenses may cause	Hazy filmy vision Dryness or grittiness Lens awareness
What are the causes of lens flexure	Pressure exerted by the upper lid High DK lens material Apical clearance lens design Against the rule corneal toricity
When evaluating fluorescein patterns, a special filter must be used with	Polymers with a UV blocker
A normal fitting standard thickness soft contact lens will exhibit what	3 point touch
What could cause a patient's rigid contact lens to displace frequently and pop out without cause	Excessive posterior Peripheral curve Flat base curve relationship
Which is the latest lens design for Keratoconus	Rose K design
A soft contact lens that is too loose will not show	Limbal compressions
A patient with a high degree of with the rule astigmatism fitted with a spherical rigid gas permeable lenses will show touch	On the horizontal Meridian
A rigid lens showing excessive apical pooling is an indication of	A steep fit
A rigid lines showing apical touch is an indication of what	A flat fit
Contact lenses that have non-spherical back surface are called	Aspheric lenses
A rigid lens showing central building is an indication of	Apical clearance fit
A rigid lens showing a band shaped area of touch on the flattest meridian is an indication of	An astigmatic fit
When there is a slight pooling of fluorescein in the Peripheral curve portion of a rigid lens that indicates what	Slight edge lift
Rx -3.00 -1.00 x 170 8.8 -3.00 -1.00 x 180 Once the correct Lee ordered lens has been dispensed the rotation marks should settle at?	10 degree clockwise
On a compromised cornea, such as one that has undergone a corneal graft what lens characteristic would be most beneficial	High DK/L
What 2 lens design changes might be helpful in centering a high riding myopic lens	Hyperflange lenticular Prism ballast
rigid gas permeable lenses flexure may be eliminated by	Reducing sagittal vaulting Increasing center thickness Choosing a lower DK material
A low riding high plus Lens on a 40.00@180\40.75@90 cornea should be corrected with	A myoflange lenticular
Mike, a welder who's RX is -6.00+2.00 x 180 has been advised to trade his PMMA lenses of 20 years for a modality that allows more oxygen to the cornea what is the first choice	Low to mid DK RGP
A technique for correcting a high riding rigid minus lens maybe to use...	Prism ballasted lens
Advantages of a myoflange versus a single cut high plus Lens include	Reduce center thickness Increase optical zone Reduce weight
To increase tear exchange with a rigid gas permeable lenses what should not be used	Increase the Sagittal depth
What polishing compounds should not be used with gas permeable lenses	Silvo
In order to create a smooth blend between the intermediate and Peripheral curve of the following contact which radius tool should be used CPC 7.50 mm (45.00 D) IPC 8.50 mm PPC 10.50	9.5 mm
To correct a flat fitting rigid gas permeable lenses you should	Enlarge the optical zone
After building up her wearing time, Jennifer returns for an afternoon recheck after eight hours of lines where the lens moved <0.5 mm and her complaints were minimal except for late afternoon burning what would you suspect	Tight lens
Which of the following will not increase the movement of a tight fitted rigid gas permeable lenses	Enlarge the posterior exam
Which of the following is not important to document in the medical records for a contact lens patient	Location at which the patient was originally thought insertion and removal

Created by: Miconstantine

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