Tomey UD-8000 User Manual

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4.1.5 HAIGIS optimized formula / HAIGIS Standard formula
1. Implanted IOL power (D)
1000
1000
d
z
na
na
dL
na
P
−
−
−
=
Where:
1000
1
VREF
REF
DCZ
⋅
−
+=
d = a0 + a1･ACD + a2･L (ACD ≠ 0)
d =(a0 – 0.241･a1) + (a2 + 0.139･a1)L (ACD = 0)
a0 = 0.62467A –
72.434 c*
(
)
RC
nc
DC
11000
−
=
2. Estimated refractive power after surgery (D)
(
)
()
XXDCYV
XDCY
REF
iol
10001000
10001000
+⋅−
⋅
−
=
Where:
X = d2･P + 1000L･na - d･L･P
Y = na (1000･na-L･P + d･P)
na : Aqueous humor and refractive index of vitreous
= 1.336
nc : Corneal reflective index
= 1.3315
A : A-Constant
RC : Average radius of corneal curvature (mm)
= (r1 + r2)/2
r : Radius of corneal curvature (mm)
= {(KI - 1) × 1000}/K
K : Corneal refractive power (D)
KI : Cornea equivalent refractive index
DC : Average corneal refractive power (D)
L : Axial length
ACD : Anterior chamber depth (mm)

Tomey UD-8000 Specifications

General

Brand	Tomey
Model	UD-8000
Category	Medical Equipment
Language	English