Tomey UD-8000 - Page 316

■ 4-10
REF : Desired refractive power after surgery (D)
V : Vertex distance (mm)
= 12
P : Implanted IOL power (D)
a1 :0.4…*
a2 :0.1…*
* The HAIGIS optimized formula uses the registered a0,
a1, and a2 for calculation.
3. Personal A-Constant
62467.0
434.7221
+
⋅
−
⋅
−
=
LaACDad
A
(ACD≠0)
(
)
62467.0
434.721241.01139.02 +
⋅
+
⋅
+
−
=
aaaLd
A
(ACD=0)
Where:
()()
(
)
zP
naPnaLznaLzPnazLPnazLP
d
⋅
⋅−⋅⋅+⋅⋅⋅−+⋅−+⋅
=
2
100010001000410001000
22
2
2
1000
1
VAREF
AREF
DCZ
⋅
−
+=
(
)
r
nc
DC
11000
−
=
AREF : Refractive power of eye after surgery (D)