which of the following is not important to document in medical records for contact
lens patients? - location at which the patient was originally taught
... [Show More] insertion and
removal
which of the following will not increase the movement of a tight fitting rigid gas
permeable lens? - enlarge the posterior optic zone
After building up her wearing time, Jennifer returned for an afternoon recheck after
eight hours of lens wear. The lenses moved <0.5 mm and her complaints were
minimal except for late afternoon burning. Which would you suspect? - tight lens
To correct a flat fitting rigid gas permeable lens you should: - Enlarge the optical
zone
IN order to create a smooth blend between the intermediate and peripheral curve of
the following contact, which radius tool should be used?
CPC 7.50 mm (45.00 D) IPC 8.50 mm PPC 10.50 mm - 9.5
which of the following polishing compounds should not be used with gas
permeable lenses - Silvo
To increase tear exchange with a rigid gas permeable lens what should be
attempted? - Reduce the overall lens diameter, Flatten the peripheral curves, and
decrease the optic zone
Advantages of a myoflange versus a single cut high plus lens include:
1.) Reduce center thickness
2.) Increased optical zone
3.) reduced weight - 1, 2 and 3
A technique for correcting a high ridding rigid minus lens may be to use a - Prism
ballasted lens
Mike, a welder whose Rx is -6.00 +2.00 *180 has been advised to trade his PMMA
lenses of 20 years for a modality that allows more oxygen to the cornea. The first
lens of choice would be: - Low to mid Dk RGP
A low riding high lens on a 40.00 @ 180 / 40.75 @ 90 cornea could be corrected
with: - A myoflange lenticular
Rigid gas permeable lens flexure may be eliminated by: - reducing sagittal
vaulting, increasing center thickness, choosing a lower Dk material
What two design changes might be helpful in centering a high riding myopic lens?
1.) Flattening the base curve
2.) myoflange lenticular
3.) Hyperflange lenticular
4.) Prism ballast - 3 and 4; hyperflange lenticular and prism ballast
on a compromised cornea, such as a one that has undergone a corneal graft, what
lens characteristics would be most beneficial? - high Dk/L lenses that allow more
oxygen to the cornia
K's 42.00 @ 170 / 43.00 @ 80
Rx -3.00 -1.00 x 170
Given the above Rx and K's, the following diagnostic toric soft lens was used: 8.8 -
3.00 -1.00 x 180
During the diagnostic evalution, the above lens rotated 10 degrees clockwise. The
lens ordered should have an axis of 180 degrees
Once the correctly ordered lens has been dispensed, the rotational marks should
settle at: - 10 degrees clockwise
When there is slight pooling of fluorescein in the peripheral curve portion of a
rigid lens, it indicates: - slight edge lift
a rigid lens showing a band-shaped area of touch on the flattest meridian is an
indication of: - An astigmatic fit
a rigid lens showing central vaulting is indicative of: - Apical clearance fit [Show Less]