K's forty five.00 @ 180/forty two.00 @ 90
Rx -2.00 -4.25 x 90
Which of the following RGP lens designs might exceptional accurate this wearers imaginative
and prescient?
A. Forty five.00 -2.00
b. 42.00 -2.00 -four.25 x 90 prism ballasted
c. 42.00 -2.00
d. Forty two.00/forty five.00 -2.00 - ANS-d. 42.00/45.00 -2.00
A _________ lens is a translating bifocal:
a. Concentric
b. Aspheric
c. Deffractive
d. Segmented - ANS-d. Segmented
A ________auxiliary trial lens will enlarge the keratometer to 61.00 D.
A. -1.25
b. +1.25
c. -1.50
d. +1.50 - ANS-b. +1.25
A lower back toric tender lens works best with:
a. Residual astigmatism
b. High corneal toricity
c. Low corneal toricity
d. Spherical toricity - ANS-b. High corneal toricity
A bifocal lens in which the energy adjustments from the primary area of the lens to the outer
edge is called
a. An aspherical lens
b. A tangent streak lens
c. A monocentric lens
d. A crescent lens - ANS-a. An aspherical lens
A dense white look of the entire peripheral circumference of the cornea which does not stain
and is often seen in the aged is referred to as:
a. Neovascularization
b. Dellen
, c. Arcus senilus
d. Corneal ulcer - ANS-c. Arcus senilus
A appropriate example of a bifocal touch lens which may additionally rotate without imaginative
and prescient imparement is:
a. Aspheric
b. Government
c. Fused crescent
d. Tangent streak - ANS-d. Tangent streak
a hardening of the crystalline lens inflicting loss of lodging is known as:
a. Presbyopia
b. Myopia
c. Hyperopia
d. Aphakia - ANS-a. Presbyopia
A excessive diploma of with the rule of thumb astigmatism equipped with a inflexible spherical
lens will show contact
a. At the horizontal meridian
b. On the vertical meridian
c. At the oblique meridian
d. At the residual meridian - ANS-a. On the horizontal meridian
A lens fitted for keratoconus need to:
a. Flatten the apex
b. Ride excessive
c. Align the apex
d. Ride low - ANS-c. Align the apex
A low using high plus on a 40.00/forty.Seventy five cornea may be corrected with
a. A myoflange
b. A hyperflange
c. A one cut
d. A panafocal - ANS-a. A myoflange
A non-wetting RGP lens may purpose:
a. Hazy, filmy imaginative and prescient
b. Lens cognizance
c. Dryness or grittiness
d. All the above - ANS-d. All the above
A everyday fitting soft contact lens can have:
a. 3 factor touch (apex and periphery)
b. Apical clearance
c. Aspect stand-off
d. Not one of the above - ANS-a. Three point contact (apex and outer edge)
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