First Author: J.Pepose USA
Co Author(s): D. Wang G. Altmann
Purpose:
To assess through-focus polychromatic image
sharpness of 5 FDA-approved presbyopia-correcting intraocular
lenses (IOLs) through a range of object vergences
and pupil diameters using an image sharpness algorithm.
Setting:
Laboratory investigation.
Methods:
A 1951 USAF resolution target was imaged
through Crystalens AO (AO), Crystalens HD (HD),
aspheric ReSTOR 4 (R4), aspheric ReSTOR 3
(R3), and Tecnis Multifocal Acrylic (TMF) IOL in a
model eye and captured digitally for each combination of
pupil diameter and object vergence. The sharpness of
each digital image was objectively scored using a 2-dimensional
gradient function.
Results:
AO had the best distance image sharpness
for all pupil diameters and was superior to the HD. With
a 5-mm pupil, the R4 distance image sharpness was
similar to the HD and at 6 mm the TMF was superior to
the HD, R3, and R4. The R3 moved the near focal point
farther from the patient compared to the R4, but did not
improve image sharpness at intermediate distances and
showed worse distance and near image sharpness. Consistent
with apodization, the ReSTOR IOLs displayed
better distance and poorer near image sharpness as pupil
diameter increased. TMF showed consistent distance and
near image sharpness across pupil diameters and the best
near image sharpness for all pupil diameters.
Conclusions:
Differing IOL design strategies to increase
depth of field are associated with quantifiable differences
in image sharpness at varying vergences and pupil
sizes. Objective comparison of the imaging properties of
specific presbyopia-correcting IOLs in relation to patientÂ’s
pupil sizes can be useful in selecting the most appropriate
IOL for each patient. FINANCIAL DISCLOSURE?: ... is employed by a forNoprofit company with an interest in the subject of the presentation, ... research is funded, fully or partially, by a company producing, developing or supplying the product or procedure presented, ... receives consulting fees, retainer, or contract payments from a competing company, ... receives consulting fees, retainer, or contract payments from a company producing, developing or supplying the product or procedure presented
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