NCLE Test review
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| This Test Measures Quality of the Tears | show 🗑
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| What is the O2 Permeability | show 🗑
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| What are the Disadvantages of Soft Lenses | show 🗑
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| For succesful contact lens wear, EOP should be at least | show 🗑
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| This test Measures the Quantity of the Tears | show 🗑
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| show | Hypoxia, Corneal Edema, Tight Contact lens Fit
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| show | 7.85 mm or +43.00D
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| what are the Layers of the Cornea | show 🗑
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| The Main Disadvantage of Soft contact lenses | show 🗑
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| What is it when we use Contact Lenses to Correct high Myopia | show 🗑
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| A Contact Lens with diameter that is larger than the Cornea is a Hydrophobic or Hydrophilic | show 🗑
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| Which of the following Curves, indicates the flattest Base Curve 7.50mm, 37.50 D, 8.60mm, 49.00 D | show 🗑
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| A CTL was ordered with a BC of 7.85mm but was received from the lab with a BC of 7.80mm. The BC of the actual lens is | show 🗑
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| a CTL with BC of 7.42mm is fitting too loose, a tighter fit may be achieved by changing the base curve to: 7.46mm , 7.85mm , 8.04mm , None of these | show 🗑
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| show | 30.00D = 11.25mm / S.S.S Rule
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| What does the Term Haptic Lens refer to? | show 🗑
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| The Secondary Curve of a RGP CTL is Generally Flatter or Steeper than the CPC and by How much? | show 🗑
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| When the Power of a curve changes by 0.50D , the radius of the Curvature Changes by approximately how much? | show 🗑
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| show | 45.00D
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| show | Larger Diameter. (Larger Diameter = Steeper Fit = Tighter Fit)
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| HEMA is an Abbreviation commonly used to describe what Lens? | show 🗑
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| what is the main reason to utilize a Ballasted CTL? | show 🗑
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| show | CPC (Central Posterior Curve) or the Base Curve (BC) or the Optic Zone
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| show | Sagital Depth ( Vault, height)
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| show | Shortening the radius of the CPC. S.S.S Rule
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| show | HEMA
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| A Contact Lens in which the anterior surface contains 2 different radii of Curvature and the Posterior surface is Spherical curve is called a ................... | show 🗑
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| show | Optic Zone (OZ)
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| A CTL which contains 2 curves, One BC and One Secondary Curve. | show 🗑
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| show | Blending of the curves
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| show | Chord Diameter
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| A lens which has been cut off to form a horizontal base which improves stabilazations....... | show 🗑
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| the effective power of a lens when measured from the back surface....... | show 🗑
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| show | the angle that the edge of bead of water makes with the surface of the plastic... the smaller the angle, the greater the wetting ability
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| show | Front Surface Toric Lenses
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| show | Bi-Toric
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| A lens design generallly used in higher plus powers which consists of a central optic zone and a surrounding non-optic peripheral or carreir portion is.... | show 🗑
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| a method of manufacturing soft contact lenses whereby a liquid material is revolved in a mold at a controlled speed and temperature which produces the desired curvature, design, and power....... | show 🗑
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| show | Spherical Equivelant
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| show | Mucin, Aqueous, Lipid
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| show | Mucin Layer
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| The Lipid Layer has a Primary function of..... | show 🗑
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| show | 13-38
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| show | 0.50D
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| show | Spectacles 7.00D CTL's 4.00D
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| show | -9.00D Minus Lens Coming Closer Gains Power
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| show | -3.00DS
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| show | +13.00D +13.25D +13.50D all are correct... NCLE will say +13.00D
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| show | -3.50D VD doesn't matter since rx is less than 4.00D
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| -2.50+0.25x90 VD = 12mm power of CTL if fit 0.75 steeper than K.... | show 🗑
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| show | +13.63D (LLP= +0.38D)
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| show | -3.00D (LLP = -0.50D)
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| a Dry Eye condition can be evaluated with a test called........ | show 🗑
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| RX -3.25D-1.00x180 K = 44.25@180 / 45.25@90 Vertex Distance 12mm what is the power of RGP CTL fitting 0.50D Flatter than K | show 🗑
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| show | using a Shadowgraph
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| Patient is wearing a RGP lens in the right eye, it has a power of +3.00D and a base curve of 43.25. if the Dr Refracts -0.50D sphere over this lens and a new lens is to be ordered with a BC of 43.00, what will the new power need to be? | show 🗑
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| the optic zone of a RGP lens can be measured with ....... | show 🗑
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| show | Lysozyme
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| The layer of the precorneal tear film responsible for exchange of materials across the corneal surface is the | show 🗑
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| show | 5 Layers
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| The average central thickness of the Cornea is....... | show 🗑
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| show | Precorneal Tear Film
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| show | Stroma
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| the corneal layer primarily responsible for maintaining the Cornea in a partially hydrated state..... | show 🗑
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| the Descemet's membrane of the cornea is produced by which layer of the cornea..... | show 🗑
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| Sever damage to the corneal endothelium results in what. | show 🗑
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| A tightly fitted soft contact lens can cause....... | show 🗑
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| The Sclera of the eye is covered by what.... | show 🗑
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| show | the Limbus
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| show | Elevated Intra Ocular Pressure
(Glaucoma)
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| show | Aniridia
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| show | Base Curve
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| the central zone of a contact lens that contains the refractive power of the contact lens is the..... | show 🗑
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| show | Chord Diameter
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| show | CPC (Central Posterior Curve)
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| The Peripheral Posterior Curve of a bicurve Contact Lens is Steeper or Flatter than the CPC | show 🗑
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| show | it increases
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| shortening the base curve radius of a contact lens makes the lens steeper of flatter? | show 🗑
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| the problem of a loosely fitting contact lens can be solved by ordering a new contact lens having a ....................... Base Curve | show 🗑
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| Increasing the overall Diameter of a contact lens makes the lens steeper of flatter? | show 🗑
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| The Effective power of a contact lens measured from the back surface is the............... | show 🗑
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| show | Front Toric Contact Lens
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| show | Back Toric
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| show | Bi-Toric
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| show | Prism Ballasted Contact Lens
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| show | Truncated CTL
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| show | Good Wettability
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| show | Loosen the fit
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| show | 7.85 mm
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| a CTL having an overall diameter of 9.5mm fits too tightly, a looser ctl will have which diameter....... (9.6 / 9.3) | show 🗑
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| an instrument that's used to measure Corneal Astigmatism is..... | show 🗑
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| show | WTR With the Rule Astigmatism
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| Concerning measurements of Corneal Curvatures, the longer the mm of Radius the Larger of Smaller the Diopter value....? | show 🗑
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| show | Hydrophobic
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| show | DK Value
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| A measurement of the Oxygen Transmissibility of a RGP CTL is called ........ | show 🗑
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| The Greater the Central Thickness of a CTL the more of less Oxygen transmissibility?..... | show 🗑
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| show | Equivalent Oxygen Performance or Percentage
Measures how much Oxygen actually reaches the Cornea while wearing CTL
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| show | Lenticular Design
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| Is the Following K reading With the rule or against the rule astigmatism?.... 43.00@180/44.00@90 | show 🗑
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| show | 7.03 mm (337.5 Rule)
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| Vertex Distance must be considered in determining CTL power if the Spectacle Rx is over................ D | show 🗑
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| the BC of a rigid CTL sitting on a cornea is flatter than the corneal curvature. Therefore the Lacrimal Lens power is....... (plus/Minus) | show 🗑
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| the best type of slit lamp illumination to use for detecting gross corneal edema is called...... | show 🗑
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| the type of slit lamp illumination that is used primarily for a general survey of the external eye is called...... | show 🗑
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| the type of slit lamp illumination that is useful for inspecting the anterior surface of a contact lens is called the....... | show 🗑
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| if a person wanting CTLs has Blepharitis, you should do what? | show 🗑
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| show | on the Tarsal Plate of the Upper eyelid margin
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| show | BUT test ( Break Up Time)
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| Polymegathism of the corneal endothelium is thought to be due to ....... | show 🗑
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| the type of slit lamp illumination used to observe Cells and flare in the anterior chamber of the eye is......... | show 🗑
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| show | Retro Illumination
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| The best type of Slit Lamp illumination for studying the corneal endothelium is ...... | show 🗑
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| the Slit lamp light that passes through a cobalt blue filter can be used to observe.......... | show 🗑
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| show | once per week
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| a Person with Scleral Show requires a (large/small) Diameter soft CTL? | show 🗑
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| Preservatives in Contact Lens Solutions can cause .......... | show 🗑
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| show | Itching
Conjunctival Redness
Conjunctival Chemosis (Swelling)
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| show | True
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| Giant Papillary Conjunctivitis occurs more frequently in people who wear what type of lenses.... | show 🗑
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| show | An increase in the steepening of the cornea
Development of irregular astigmatism
Permanent form of acquired Keratoconus
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| Limbal Compression is a sign of (loose - tight) fitted ctl | show 🗑
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| show | -3.00 D (1/3 Rule)
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| an eye has a spectacle rx of -3.25-0.50X180. This eye should be fit with a hydrogel CTL having a power of........... | show 🗑
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| show | -3.50 D (1/3 Rule)
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| An eye has a spectacle Rx of -6.50+1.00X090. the K readings are 42.00@180/43.00@90. The Vertex Distance is 12mm. This eye should be fit with Soft CTL RX of,,,,,,,,,,,,,,,,,,,,,, | show 🗑
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| show | Good Stability
Good Optics
Acceptable Wettability
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| which of the following CTL materials has the highest Oxygen Permeability.. (HEMA, PMMA, ACRYLATE, SILICONE) | show 🗑
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| The water content of hydrogel contact lenses varies from.......... | show 🗑
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| show | Greater
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| show | HEMA
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| show | Punctum
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| During a blink the lower eyelid moves primarily towards the...... | show 🗑
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| show | Levator Palpebrae
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| show | 7.35
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| the layer of the pre corneal tear film that is responsible for exchange of materials across the corneal surface is the........ | show 🗑
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| The Function of the Eyelids are......... | show 🗑
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| show | Eyelid Margin
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| the Meibomian Glands are located in the......... | show 🗑
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| show | an internal Hordeolum
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| with spontaneous blinking, the normal blinking rate is...... | show 🗑
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| show | 3 Lipid, Aqueous, Mucus
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| with basic tear secretion, the aqueous tear film layer is secreted by the.............. | show 🗑
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| the pre-corneal tear film layer that changes the hydrophobic surface of the cornea to a hydrophilic surface is the .............. | show 🗑
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| the pre-corneal tear film layer that reduces the rate of tear evaporation is the.......... | show 🗑
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| The mucous layer of the pre corneal tear film is secreted by the..... | show 🗑
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| The Lipid Layer of the Precorneal tear film is secreted from......... | show 🗑
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| show | Apical Clearance
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| When fitting PMMA CTL, the CTL diameter can be calculated by adding 4 mm to the | show 🗑
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| show | Plus Carrier Lenticular Lens. Hyperflange
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| show | Fluorescein
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| show | False.
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| what solution improves the wettability of Rigid CTL's..... | show 🗑
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| if a rigid CTL on an eye is too steep the fluorescein pattern will show....... | show 🗑
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| if a rigid CTL on an eye is too flat the fluorescein pattern will show....... | show 🗑
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| the size of the entire corneal cap can be measured with the.... | show 🗑
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optician
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