Tomey UD-8000 - Dense Cataract Eye; Aphakic Eye; IOL Eye

4-15 ■
4.2.2 Dense cataract eye
Take the axial length measurement in the same manner as when using
the average acoustic velocity for a phakic eye.
4.2.3 Aphakic eye
Take the axial length measurement in the same manner as when using
the average acoustic velocity for a phakic eye.
4.2.4 IOL eye
The axial length measurement is obtained using the following formulae.
: Axial length measurement
: Center thickness of IOL (entered by user)
: IOL acoustic velocity
: Anterior chamber depth acoustic velocity
: Vitreous acoustic velocity
: Measurement time
: Time for measuring chamber death
: Time for measuring a vitreous body
IOL
acdaxlvit
vitvitacdacd
V
Th
ttt
tV
Th
tV
Lp
2
22
−−=
⋅
++
⋅
=
Lp
Th
IOL
V
acd
V
vit
V
axl
t
acd
t
vit
t