SCL Fitting Practice Exam Questions Correct Detailed Answers.
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Course
SCL.
Institution
SCL.
Why SCL over G.P.? - correct answer -initial comfort/ min adaptation
-tints
-sports/environment
-possible part time wear
-no corneal distortions
-easy to fit
-spare lens
-can have no care
What distinguishes refit from new fit? - correct answer...
, Trial Lens Diamteter considerations - correct answer -want smallest lens that
provides good coverage/movement
-~0.5-1.5mm
-consider visible iris diameter, aperture size, fit of first trial lens
Trial Lens BC considerations - correct answer -less effect on movement than
diameter
-choose either middle or flatter available urge
-want flattest BC that gives good comfort w/o excessive movement
BC Power? KNOW THIS - correct answer -BC in mm x D = 337.5
(So 337.5/BC in mm = D)
Convenient pair to remember: 7.50 mm <-> 45D
BC Radius Steepeness? - correct answer -Longer BC radius = flatter
-Shorter BC radius = steeper
What is CL Sagittal Depth affected by - correct answer -increased by
larger/steeper CL (shorter BC radius)
-decreased by smaller/flatter CL (longer BC radius)
What is ocular sagittal depth influenced by - correct answer -Corneal diameter
-rate of peripheral corneal flattening
-central ordeal curvature (K's)
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