Quiz 5 Flashcards
A lens fitted for Keratoconus should:
a. Vault the apex
b. Flatten the apex
c. Align with the apex
d. Ride high
c. Align with the apex
Which of the following conditions may benefit from an X-chrom or Ruby Red lens?
a. Aniridia
b. Corneal scars
c. Color deficiency
d. Colobomas
d. Color deficiency
One might utilize which of the following lens designs given the following information:
K’s 46.00@100 / 49.00 @020 +2 distortion
Rx -7.00 -3.50 x100
a. Ortho K
b. Front surface toric RGP
c. Menicon Plateu
d. Rose K
d. Rose K
Which of the following conditions may benefit from an iris lens with a black pupil?
a. Colobomas
b. Corneal scars
c. Anaridia
d. Color deficiency
b. Corneal scars
On a compromised cornea, such as that has undergone a corneal graft, what lens characteristics would be most beneficial?
a. High DK/L
b. High tensile strength
c. High flexibility
d. High wetting angle
a. High DK/L
Among the following choices, which is the latest lens design for Keratoconus?
a. Soper design
b. Aspheric
c. McGuire design
d. Rose K
d. Rose K
RGP lenses with a secondary curve steeper than the CPC may be used for all of the following conditions except ______ .
a. Orthokeratology
b. Post RK
c. Post LASIK
d. Aphakia
d. Aphakia
A patient has a possible acuity of 20/25 but has anaridia and photophobia. What type of lens would you fit?
a. Opaque cosmetic lens with optics
b. Translucent lens with optics
c. Opaque cosmetic lens with a black pupil
d. Translucent lens without optics
a. Opaque cosmetic lens with optics
An aphakic patient with K readings of 40.50 @180 / 41.25 @090, large palpebral fissures and flaccid lower lids is a good candidate for a _______ lens.
a. Single cut RGP
b. Collegen shield
c. Bitoric RGP
d. Myoflange lenticular RGP
d. Myoflange lenticular RGP
Keratoconus and penetrating keratoplasty fittings are best accomplished by which of the following?
a. Molded impression
b. Nomogram
c. K’s and Rx
d. Diagnostic fitting
d. Diagnostic ftting
