Upload
amelia-cantrell
View
216
Download
1
Tags:
Embed Size (px)
Citation preview
Spherical Aberration Post Bilateral Implantation of Two Prevalent
Aspheric IOLs
DR. ROBERT A. KAUFER, MD
MARTINEZ, BUENOS AIRES
ARGENTINA
This research funded by Alcon Laboratories.
To determine the aspheric lens with the best clinical outcomes in a real-world setting where preoperative wavefront analysis for aspheric lens customization is not the standard of care.
Purpose
Final enrollment 37 bilateral patients 18 SN60WF 19 Z9000
Healthy eyesPostop exam 3 months after surgery
Spherical Aberration (SA) Trace aberrometer/topographer (Tracey Technologies)
Non-dilated 4.5mm scan
VA Contrast
Methods
SN60WF Z9000
Design Single Piece Multi-Piece
Optic Zone 6.0 mm 6.0 mm
Central Optic Thickness 0.61 mm 0.50 mm
Chromophore Blue Light Filter None
Aspheric Surface
Posterior Anterior
Lens SA -0.21 μm -0.27 μm
Residual SA by Design 0.1 μm 0.0 μmResidual SA by Design 0.1 μm 0.0 μm
IOL Specifications
72% 68%
Lens had no apparent effect on amount of postoperative SA
n=74 eyes
0
5
10
15
20
25
30
SN60WF Z9000
Lens Model
Pe
rcen
t
<=0.025
0.025-0.050
0.05-0.075
0.075-0.1
0.1-0.125
0.125-0.150
0.15-0.175
0.175-0.2
>0.2
Percent Distribution of Postop Spherical Aberration (μm)
If lens model had no effect on postop SA distribution…
Does lens model have an effect on performance at a specified SA range?
Patients broken into 3 groups <0.1μm postop SA OU >0.1μm postop SA OU Mixed (one eye < 0.1 μm & one eye >
0.1 μm)
Results Analysis
<0.1μm >0.1μmMixed20/20
20/16
Sn
ellen
-0.10
-0.08
-0.06
-0.04
-0.02
0.00
Lo
gM
AR
(n=22) (n=9) (n=6)
Binocular BCVA with Three Postop SA Groups
20/20
Sn
ellen
20/25
20/30
20/40
20/50
20/63
20/80
0.00
0.10
0.20
0.30
0.40
0.50
0.60
Photopic Mesopic
Lo
gM
AR
<0.1 OU Mixed >0.1 OU(n=22) (n=9) (n=6)
12.5% Low Contrast Acuity with Three Postop SA Groups
0.000.200.400.600.801.001.201.401.601.802.002.20
1.5 3 6 12 18Cycles/Degree
Lo
g U
nit
s
<0.1 OU >0.1 OU Mixed(n=22) (n=9) (n=6)
Photopic Contrast Sensitivity with Three Postop SA Groups
0.000.200.400.600.801.001.201.401.601.802.002.20
1.5 3 6 12 18Cycles/Degree
Lo
g U
nit
s
<0.1 OU >0.1 OU Mixed
Mesopic Contrast Sensitivity with Three Postop SA Groups
0.000.200.400.600.801.001.201.401.601.802.002.20
1.5 3 6 12 18Cycles/Degree
Lo
g U
nit
s
<0.1 OU >0.1 OU Mixed
Mesopic with Glare Contrast Sensitivity with Three Postop SA Groups
A slight positive postoperative SA (>0.1 μm) appears to enhance visual acuity.
Larger populations are likely required to evaluate the modest impact of SA on contrast.
Postoperative SA alone was not a predictor of contrast sensitivity.
Postoperative analysis should include coma and total HOA to account for all residual aberrations of the eye.
Conclusions