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EXTENDED DEPTH OF FOCUS WITH INDUCED SPHERICAL ABERRATION IN LIGHT ADJUSTABLE IOLs. L ABORATORIO DE O PTICA, U NIVERSIDAD DE M URCIA , SPAIN * Hospital Virgen de la Arrixaca, Murcia, SPAIN. Pablo Artal , Eloy Villegas, Encarna Alcón, Inés Yago*, Elena Rubio*, José M. Marín*. - PowerPoint PPT Presentation
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EXTENDED DEPTH OF FOCUS WITH INDUCED SPHERICAL ABERRATION
IN LIGHT ADJUSTABLE IOLsPablo Artal, Eloy Villegas, Encarna Alcón,
Inés Yago*, Elena Rubio*, José M. Marín*LABORATORIO DE OPTICA, UNIVERSIDAD DE MURCIA, SPAIN
* Hospital Virgen de la Arrixaca, Murcia, SPAIN
Supported by:
Reserch funding and consulting reimbuserment provided by Calhoun Vision, USA
Light-adjustable intraocular lenses (LALs)* allow nearly
PERFECT refractive outcomes, but also…
customized near vision by extended depth of focus with induced spherical aberration.
*
Defocus (D)-2 -1 0 1 2
1/le
tte
r s
ize
0.10
0.12
0.14
0.16
0.18
0.20
0.22
Spherical aberration increases depth of focus
Defocus (D)-2 -1 0 1 2
1 /
le
tte
r s
ize
0.10
0.12
0.14
0.16
0.18
0.20
0.22
LAL secondary treatments to induce spherical aberration
(asphericity) increasing depth of focus
(See example of LAL full treatment in next slide)
lock-ins
eye’s wave-fronts (examples)
Secondary adjustmentInducing spherical
aberration
Surgery
Two weeks
Primary adjustmentcorrecting defocus
& astigmatism
Patients were implanted bilaterally with LALs
One eye was set to near emmetropia and in the fellow eye negative spherical
aberration was induced
Visual acuity was measured using a computer-assisted procedure both monocularly (each eye separately)
and binocularly
Refraction and spherical aberration measured in each patient with a Hartmann-Shack wavefront sensor
40 cm 30 cm60 cm
and with letters on a micro-display placed at:
Example of induction of negative spherical aberration in LALs
Post-lockin 2Pre-adjusment
Z12=+0.12m Z12 =-0.20m
Myopic M1SA3_60
AsphericF4.7_0.5
> |-0.3| m
BINOCULAR, ONE EYE WITH NEGATIVE SA (sample:4)FAR EYE [-0.75, 0D] [+0.09, +0.25m],
NEAR EYE [-2.25, -1.25D] [-0.08, -0.23m]
DISTANCE (mm)
FAR600400300
VIS
UA
L A
CU
ITY
0.0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
1.0
1.1
1.2
20/20
20/40
20/25 J1
J3
20/30 J2
Binocular vision Monocular (“far” eye)Monocular (“near” aspheric eye)
Z12[-0.14,-0.24 m] (sample 4)
Visual acuity as a function of object distance
BINOCULAR, ONE EYE WITH NEGATIVE SA (sample:4)FAR EYE [-0.75, 0D] [+0.09, +0.25m],
NEAR EYE [-2.25, -1.25D] [-0.08, -0.23m]
DISTANCE (mm)
FAR600400300
VIS
UA
L A
CU
ITY
0.0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
1.0
1.1
1.2
20/20
20/40
20/25 J1
J3
20/30 J2
Binocular vision
Z12[-0.14,-0.24 m] (sample 4)
Visual acuity as a function of object distance
- The use of the LALs as an advanced and fully customized approach to produce extended depth of focus modifying the eye’s asphericity has been demonstrated.
- In a group of 4 patients, the average binocular visual acuity was 1.1 for far and J1 or better for intermediate and near distances.
- The particular amounts of spherical aberration and defocus can be personalized to maximize quality of vision at all distances.
Conclusions