3-18
a) Hard Contact Lenses
1) Place the contact lens on the nose piece with the front (convex)
surface upward.
2) Move the lens back/forth and left/right for centering. Refer to
Section 3.2.1, Measuring single vision lenses, for measurement
procedures.
b) Soft Contact Lenses
• Due to the physical properties of soft contact lenses, the
reading may not be accurate.
1) Wipe off water from the soft contact lens.
2) Place the contact lens on the nose piece with the front (convex)
surface upward.
3) Move the lens back/forth and left/right to center it. Refer to Section
3.2.1, Measuring single vision lenses, for measurement procedures.
3.2 MEASURING METHODS
Contact Lens
H
O
L
D
CL
CL
HOLD
CL