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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| show | 7%
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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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| show | Epithelium, Bowmans' Layer, Stroma, Descemet's Membrane, Endothelium
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| The Main Disadvantage of Soft contact lenses | show 🗑
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| show | Orthokeratology (Ortho-K)
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| show | Hydrophilic
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| show | 37.50 D
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| show | 0.25D steeper than the ordered CTL
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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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| show | A Scleral CTL Size
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| show | Flatter by 2 to 4 Diopters
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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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| The CPC of a CTL measures 7.5mm Radius, how much is the Power in Diopters? | show 🗑
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| A soft CTL demonstrates excessive movement. This can be fixed with a Lens that has a ______________ Diameter? | show 🗑
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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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| A loose fitting CTL can be made to fit tighter by ___________ the Radius of the CPC. | show 🗑
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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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| show | Bicurve CTL
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| The Smoothing of the junction zones by removing the sharp line between the zones is...... | show 🗑
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| The measurement from one edge of the lens to the opposite edge is........ | show 🗑
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| A lens which has been cut off to form a horizontal base which improves stabilazations....... | show 🗑
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| show | BVP Back vertex power...
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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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| A lens in which the anterior surface has two different radii and the posterior surface is spherical.... | show 🗑
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| show | Bi-Toric
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| show | Lenticular Bowl
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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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| This Tear Film layer will change the corneal surface from an Hydrophobic surface to a Hydrophilic Surface..... | show 🗑
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| The Lipid Layer has a Primary function of..... | show 🗑
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| what age group has the best prognosis for successful Contact Lens Fitting........ | show 🗑
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| When moved 5mm from it's original position the effective power of a 10.00 D lens will change by........... | show 🗑
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| when do we consider vertex distance compensation for Spectacles and for CTL's? | show 🗑
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| show | -9.00D Minus Lens Coming Closer Gains Power
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| RX -4.00+1.00x90 K: 42.50@180/43.50@90 RGP CTL fit on K has a power of......... | show 🗑
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| +11.00+1.00x20 VD = 12mm K: 46.25/47.25 What's the power of RGP lens fitted on K | show 🗑
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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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| A -3.50D Lens with a base curve of 44.50D provides excellent visual acuity. if the CPC were changed to 45.00D what power would be needed? | show 🗑
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| show | Schirmer Test
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| show | -2.75D
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| How do you assess the quality of the peripheral curves of a RGP lens? | show 🗑
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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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| show | Radiouscope
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| An Enzyme contained in the precorneal tear film that protects the cornea from infections is.......... | show 🗑
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| show | Aqueous Layer
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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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| show | Bulbar Conjunctiva
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| New blood vessels that grow into the cornea originate from blood vessels that are located in ......... | show 🗑
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| Obstruction of the flow of aqueous humor out of the anterior chamber results in... | show 🗑
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| show | Aniridia
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| the curvature of the central portion of the back surface of a contact lens is the...... | show 🗑
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| show | Optic Zone
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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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| show | Steeper
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| show | Back Vertex Power
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| This Contact lens has 2 different Radii on the anterior surface and a Spheric Posterior curve. It's used to correct Residual Astigmatism..... | show 🗑
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| When correcting Large amounts of Corneal Astigmatism a Toric lens must be used that is a ................. Toric. (Front/Back) | show 🗑
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| show | Bi-Toric
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| show | Prism Ballasted Contact Lens
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| A CTL that is Cut off inferiorly so the lower eyelid can help to stabilize the contact lens is called a ........... | show 🗑
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| A CTL that has a low wetting Angle has ............ Wettability | show 🗑
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| show | Loosen the fit
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| A CTL having a BC radius of 7.94 mm fits too loosely, a tighter fitting CTL will have which one of the following BC.... (7.99 / 7.85) | show 🗑
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| show | 9.3 mm
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| show | Keratometer
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| show | WTR With the Rule Astigmatism
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| show | Smaller (SSS Rule)
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| show | Hydrophobic
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| A Lab Measurement of the Oxygen permeability of a RGP CTL is called...... | show 🗑
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| show | DK/L
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| show | Less
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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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| show | Minus
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| show | Sclerotic Scatter
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| show | Diffuse Illumination
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| show | Direct Focal Illumination
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| if a person wanting CTLs has Blepharitis, you should do what? | show 🗑
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| where is the Giant Papillary Conjunctivitis Located?.... | show 🗑
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| a test used to assess the quality of the precorneal tear film is called the...... | show 🗑
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| Polymegathism of the corneal endothelium is thought to be due to ....... | show 🗑
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| show | Conical Beam Illumination
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| the type of slit lamp illumination that is the method of choice for examination of microcystic epithelial edema of the cornea is called.... | show 🗑
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| show | Specular Reflection
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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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| a Soft CTL case should be thoroughly cleaned at least........ | show 🗑
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| show | Large Diameter Soft CTL
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| show | Photophobia
Corneal Staining
Excess Tearing
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| show | Itching
Conjunctival Redness
Conjunctival Chemosis (Swelling)
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| True/False Corneal Sensation is reduced in an Aphakic Eye. | show 🗑
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| show | Soft Hydrogel lenses
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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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| show | Tightly fitting CTL
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| an eye has a Spectacle Rx of -3.00-0.25X180. This eye should be fit with a soft CTL having a power of................ | show 🗑
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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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| an eye has a spectacle Rx of -4.00+1.00X180. this eye should be fit with a hydrogel CTL having a power of........... | show 🗑
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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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| what are characteristics of PMMA CTL's...... | show 🗑
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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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| The higher the Water Content of a Hydrogel CTL the.................... the Oxygen Transmissibility. | show 🗑
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| Hydrogel CTL are made of what material. | show 🗑
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| show | Punctum
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| show | Nose
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| show | Levator Palpebrae
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| the PH of the Pre-corneal tear Film is...... | show 🗑
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| show | Aqueous Layer
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| show | Limit the amount of light entering the eye
Protect the eye from external irritation
Distribute Tears over the surface of the eye.
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| show | Eyelid Margin
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| show | Tarsal Plate.
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| an Acute infection of the Meibomian Glands is called..... | show 🗑
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| with spontaneous blinking, the normal blinking rate is...... | show 🗑
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| the pre-corneal tear film is composed of how many layers....... | show 🗑
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| show | Glands of Wolfring and Krause
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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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| show | the Meibomian Glands
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| A spherical PMMA CTL should be fit so that there is a slight............... | show 🗑
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| show | Pupilary Diameter
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| A high minus RGP CTL should have .........(+/-) Carrier Lenticular Lenses. | show 🗑
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| the quality of fit of a RGP CTL can be assessed with the use of........ | show 🗑
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| Rigid CTL's can be modified in the office to become Steeper. (true-False) | show 🗑
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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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| show | Central Touch
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| show | Topogometer
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Created by:
optician
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