2. Lens Position and Movement
Evaluate lens position and movement; the ideal
fit will be superior central (upper lid attachment) with a
fluorescein pattern that demonstrates alignment along the
flattest corneal meridian. Make base curve and diameter changes
accordingly (see troubleshooting chart).
3. Lens Power and Add Series Selection
Perform your over-refraction with loose trial
lenses to determine the final distance Rx. Expect final Rx
to be -0.50D to -1.00D more than the existing contact lens
Rx. Place the over-refraction in a trial frame and evaluate
the transition from distance to near vision. If the over-refraction
leads to acceptable distance but unacceptable near vision,
reassess your base curve and/or add selection. |
