Biomedical Engineering Reference
In-Depth Information
As we can see in Figure C-2C, the fluid lens has powers of zero in the verti-
cal meridian and
1.00 D in the horizontal meridian. Consequently, a -6.00 DS
contact lens will correct the ametropia. (A
+
−
6.00 DS contact lens combined with a
pl
+
1.00
×
090 fluid lens results in a correction of
−
6.00
+
1.00
×
090. Transposing
this into minus cylinder form, we have
180.)
There is much more to learn about the optics of contact lenses. A more detailed
and comprehensive discussion of this topic can be found in
Mandell RB
. Contact
Lens Practice,
4th ed. Springfield, IL: Thomas, 1988
.
−
5.00
−
1.00
×
