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TRANSCRIPT
Adaptive Optics visualsimulator
(…and depth of focus)
Pablo ArtalLABORATORIO DE OPTICA
UNIVERSIDAD DE MURCIA, SPAIN8th International Wavefront Congress, Santa Fe, USA, February
2007
New LO·UM building!
Supported by:
PedroPrieto
SilvestreManzanera
DiegoAyala
&
JoeLindacher
Active element
Aberration correction with AdaptiveOptics
Aberrated eye
+
+
=
Corrected eye
=
Phase manipulation with AO
Original eye
+
Active element
+
=
Modified eye
=
Visual simulation
sXIII defocus
Using the AO visualsimulator to search for
better solutions forpresbyopia…
using phase masks!
NO accommodation
Adding phase mask
0 1 2 3 40.00.20.40.60.81.0
Defocus (D)
Strehl
0 1 2 3 40.00.20.40.60.81.0
Defocus (D)
Strehl
Spectra of Zernike modes with and without paralyzedaccommodation for 4.7 mm pupil
Adaptive opticsVISUAL SIMULATOR
Interactivedesign/testing of
new ophthalmic devices
Presbyopic corrector designprocedure
Phase profile design
Prototype implementation
Mass production
Clinical testing
Phase profile design
Prototype implementation
Mass production
Clinical testing
Adaptive opticsvisual simulator
Presbyopic corrector designprocedure
Spatiallight
modulator
Stimuligenerator
Subject
H-S
E
?
Visualtestin
g
Induced phase
Hamamatsu X8627
Active element: Liquid crystal programmable phasemodulator
Advantages against deformable mirrors:_ High fidelity: no need of close-loopoperation_ No continuity constrains: steep phasechanges allowed_ High phase range (ideal for presbyopiczones)
Diode laser780 nm
Focus / vergencecontrol
Pupil
Cold mirror
StimuliGenerator
Polarizer
E
Beamsplitter
Modulator
Subject
Induced phase
LASER633 nm
Pupil
Spatialfilter
Hartmann-Shack
Adaptive Optics Visual Simulator
CCD camera
StimuliGenerator
CCD camera
E
Pupil
LASER633 nm
Pupil
Spatialfilter Focus / vergence
control
Polarizer
Beamsplitter
Modulator
Subject
Induced phase
Hartmann-Shack
Diode laser780 nm
Aberration measurement and couplingstudiesCold mirror
0 Dp1.4 Dp
2.8 Dp
Focus / vergencecontrol
Pupil
Cold mirror
Polarizer
Beamsplitter
Modulator
Hartmann-Shack
Subject
Induced phase
LASER633 nm
Pupil
Spatialfilter
CCD camera
Objective estimation of depth of focus
0 Dp1.4 Dp
2.8 Dp
Focus / vergencecontrol
Pupil
Cold mirror
Polarizer
Beamsplitter
Modulator
Hartmann-Shack
Subject
Induced phase
LASER633 nm
Pupil
Spatialfilter
CCD camera
Defocus (Dp)0 1 2 3
0.0
0.2
0.4
0.6
0.8
1.0TheoreticalExperimental
Stre
hl
Bifocal profile
Defocus (Dp)0 1 2 3
0.0
0.2
0.4
0.6
0.8
1.0TheoreticalExperimental
Trifocal profile
Stre
hl
Objective estimation of depth of focus
PHASEDESIGN SOFTWARE GRAY-LEVEL
IMAGE
SLM
LO·UM_AO_visualsimulator
RELAY-OPTICSVISUAL
TESTING
smile
Hartmann-Shack
LASER633 nm
Pupil
Spatialfilter
CCD camera
Diode laser780 nm
Focus / vergencecontrol
Pupil
Cold mirror
StimuliGenerator
Polarizer
E
Beamsplitter
Modulator
Subject
Induced phase
Subjective depth of focus
Defocus (D)0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5
'x' size (min)
468
10121416182022
no phasephase A phase B
E
Depth of focus with different phaseprofiles
The best phases can bemanufactured
as contact lenses…
E
AOVS ON
E
Prototype checking
AOVS OFF
Stimulus vergence (Dp)0 1 2 3
0.000.050.100.150.200.25
Estimulus vergence (D)0 1 2 3
Reading perform
. (1/m
in) 0.000.050.100.150.200.25 2.4 mm pupil 3.6 mm pupil
Phase on actual contact lensPhase produced by the PPM inthe AO system
Subject: PA Subject: PA
Goodagreement!
Prototype checking
· Adaptive Optics used assimulator is a powerful tool tobetter understand how opticsaffects vision and to develop newand improved ophthalmicsolutions
· In particular, we havedemonstrated its potential toevaluate the depth of focus ofdifferent phase profiles to correctpresbyopia
Conclusions
· The performance predicted withthe AO system and that obtainedwith actual lenses were in quite agood agreement
· This AO approach can saveseveral steps in currentprocedures for contact lens designand eventually lead to improvedvisual solutions
Conclusions
