Indications & Contraindications for Contact Lens Wear Flashcards
Through strong aphakic spectacles, a patients will see an object ________ larger compared to the normal image size.
A. 7%
B. 10%
C. 15%
D. 33%
33%
Rays of light striking a spectacle lens at its edge create ______________ or distortion.
A. Oblique
B. Aberration
C. Astigmatism
D. Cylinder
Aberration
____________ is a moderate to high refractive difference in the powers of both eyes.
A. Anisometropia
B. Myopia
C. Aberration
D. Hyperopia
Anisometropia
Through spectacles, the astigmatic patient with against-the-rule astigmatism will view a square as
A. The square will appear slightly longer in the horizontal meridian
B. The square will appear slightly elongated in the vertical meridian
C. The square will appear slightly tilted
D. There will be no difference in the appearance of the square
The square will appear slightly elongated in the vertical meridian
The practitioner should suspect __________ astigmatism if there is a difference between the amount of cylinder found by keratometry readings and the amount of cylinder found by the refraction.
A. Corneal
B. Oblique
C. Internal
D. Myopic
Internal
When myopic patients view an object at near through their spectacles, the prism created through the lenses is
A. Base-In
B. Base-Out
C. Neutral
D. Oblique
Base-In
A __________ person must accommodate more when viewing near objects through their contact lenses vs. spectacles.
A. Myopic
B. Hyperopic
C. Astigmatic
D. Presbyopic
Myopic
______ _________ results when the cornea has been damaged by trauma, inflammation, or scar tissue.
A. Hyperopic Astigmatism
B. Myopic Astigmatism
C. Emmetropic Astigmatism
D. Irregular Astigmatism
Irregular Astigmatism
The visual error cause by a cylindrical crystalline lens is known as _______ astigmatism.
A. Corneal
B. Oblique
C. Myopic
D. Lenticular
Lenticular
Objects in the field of vision of a high myope are ________ when spectacles are worn.
A. Magnified
B. Minified
C. Oblique
D. Irregular
Minified
________ is a developmental anomaly of the cornea that results in irregular myopic astigmatism.
A. Emmetropia
B. Nystagmus
C. Keratoconus
D. Aniridia
Keratoconus
When decompensation of the ________ occurs, aqueous humor leaks into the anterior layers of the cornea forming bullae.
A. Stroma
B. Endothelium
C. Epithelium
D. Conjunctiva
Endothelium
In the latter stage of keratoconus, which of the following will not be observed?
A. Munson’s Sign
B. Distorted Mires
C. Fleischer’s Ring
D. Corneal Thickening
Corneal Thickening
Which of the following conditions is a contraindication to contact lens wear?
A. Severe Blepharitis
B. Keratoconus
C. Bullous Keratopathy
D. Irregular Astigmatism
Severe Blepharitis
__________ lenses are used on patients with recurrent epithelial erosions.
A. Toric
B. Scleral
C. Bandage
D. Lenticular
Bandage
