Table of Contents - WOC 2012

FP-CAT-SA 173 (2)
The Visual and Refractive Outcomes of AcrySof Toric Intraocular
Lens in Subjects with Cataracts and Corneal Astigmatism
Hashemian Seyed Javad (1)
1. Eye Reaserch Center, Rasoul Akram Hospital, Tehran Uneversity of MS
Objective: To assess visual and refractive outcomes and rotational stability
after phacoemulsification with toric intraocular lens (IOL) implantation.
Prospective, nonrandomized, observational case series. 48 eyes of consecutive
patients with more than 1.50 diopter (D) of preexisting corneal astigmatism
having phacoemulsification with AcrySof Toric IOL. UCVA, BCVA, refractive
sphere, and keratometric and refractive cylinder were recorded preoperatively
and 2 and 6 months after surgery. Toric IOL axis shift was also measured.
Results: Preoperatively, 100% of patients BCVA were lower than 20/40. At 6
months postoperation, UCVA was 20/40 or better in 95.8% of the eyes, with
66.6 % achieving 20/25 or better. 100 % of eyes achieved 20/4 or better
BCVA. Mean refractive cylinder was reduced significantly after surgery from
2.800 D to0.901 D (P < .001). Vector analysis to compare attempted vs.
achieved correction showed that 93.2% of eyes were within ± 1.00 D for the
spherical equivalent, and 89.4% of eyes were within ±0.50 D for the astigmatic
components. Mean toric IOL axis rotation was2.68 ± 2.72 degrees, being < 5
degrees in 95.8% of eyes evaluated.
Conclusions: Implantation of the AcrySof toric IOL proved to be an effective,
safe, and predictable method of managing corneal astigmatism in cataract
patients.
FP-CAT-SA 173 (3)
Outcomes after WIOL - CF Accommodative Intraocular Lens
Implantation
Pallikaris Ioannis (1) , Portaliou Dimitra (1)
1. Institute of Vision and Optics (VEMMO - IVO)
Methods: 25 patients (50 eyes) with mean age 65, 3 ± 8, four years underwent
routine cataract surgery and WIOL - CF accommodative IOL. The WIOL- CF
accommodative IOL design is based on the biomimetic principle according to
which the hydro gel material used and the lens geometry simulate some of the
key properties of the crystalline lens itself providing pseudo-accommodation
capability.
Results: Mean follow up was 11,44 ± 2,46 months. Uncorrected Distance
Visual Acuity (UDVA) improved from 0,31 ± 0,17 preoperatively to 0,74 ±
0,19 and Corrected Distance Visual Acuity (CDVA) improved from 0,61 ±
0,19 preoperatively to 0,82 ± 0,13 at the last follow - up examination. 88% of
patients gained one or more lines of CDVA while 72% had J1 to J1 - J2, at the
last follow up, measured with Birkhauser reading charts at a distance of 35 cm
under photopic conditions. No complications occurred intra or postoperatively.
Pseudo-accommodation was assessed using the iTrace technology.
Conclusion: WIOL - CF accommodative IOL implantation can restore some
degree of natural accommodation providing satisfactory visual outcomes for
both distant and near vision.
FP-CAT-SA 173 (4)
Comparison of Contrast Sensitivity in Patients with Spherical and
Aspherical Intraocular Lenses
Pai Vijaya (1) , Shetty Priyanka (1) , Hazarika Manali
1. Department of Ophthalmology, Kasturba Medical Colleege
Aim: To compare the contrast sensitivity among eyes implanted with spherical
and aspherical intraocular lenses after phacoemulsification surgery in both
photopic and mesopic conditions .
Materials and methods: Total number of 81 patients were included in the study.
Group 1 had spherical intraocular lens [IOL], Acrysof SA60AT[Alcon] and
Group 2 “had Acrysof SN60WF[Alcon] IOL implanted. Contrast sensitivity was
measured with Pelli Robson chart in both photopic and mesopic conditions
with best glass correction at 6 weeks postop period. SPSS 11.5 software was
used for statistical analysis.
Results: There were 44 patients in group 1 and 37 in group 2. The median age
was 71 years in the group 2 versus 62 yrs in the group 1. The mean best
corrected vision was 6/6p in both the groups. In group 1 the mean photopic
contrast sensitivity was 1.39 and mesopic was 1.40. In group 2 the mean
contrast sensitivity was 1.37 in both photopic and mesopic conditions.
Conclusion: There was no significant difference in the contrast sensitivity in
both the groups. There was no significant difference between mesopic and
photopic contrast sensitivity.
FP-CAT-SA 173 (5)
Bilateral Implantation of Artificial Iris
Novak Jan (1) , Almesmary Abulgasim Adam (2)
1. Department Ophthalmology, Regional Hospital Pardubice
2. Department of Ophthalmology, Omar Al-Mukhtar University
WOC2012 Abstract Book
Purpose: A case report is concerned with effectiveness and safety of the new
artificial iris implant and the method of its implantation in the case of large pupil
expected after cataract surgery.
Methods: Artificial acrylic coloured membrane (named an artificial iris) was
implanted bilateral in one patient with mydriatic pupils after previous
bilateral acute glaucoma attact and resulting cataract. The single piece IOL
was implanted into the bag after a standard phaco and above the IOL was
implanted also into the bag the artificial iris (diameter of 9mm, inner hole of
4mm) using a standard cartridge of 2,2mm. The colour was used according to
periphery of own iris.
Result: Bilateral UCVA 0,79 six month after surgery. No surgical or late
complication. The patient satisfied with the cosmetic effect.
Conclusion: Intracapsular implantation of the artificial iris combined with any
IOL is seen to be a solution of the expected large pupil after cataract surgery.
FP-CAT-SA 173 (6)
Multivariate Nonparametric Techniques for Astigmatism Analysis
Miller Kevin (1,2)
1. David Geffen School of Medicine at UCLA
2. Jules Stein Eye Institute
Purpose: To demonstrate the application of nonparametric multivariate
statistical methods to the analysis of astigmatism treatment outcomes.
Methods: Nonparametric methods were applied to a published dataset and 12
test data sets that were created for test purposes. The nonparametric tests
were rank-based multivariate analysis of variance (MANOVA), sign-based
MANOVA, and bootstrapping based on Hotelling›s T2 statistic.
Results: Re-analysis of the published dataset using the three nonparametric
tests detected statistically significant treatment effects at all postoperative
examinations. The three nonparametric tests were able to detect differences
in astigmatism outcomes for multiple test data sets that simulated normal
distributions. For the test data sets that simulated non-normal distributions,
Hotelling›s T2 test and bootstrapping based on Hotelling›s T2 statistic were
only able to detect a difference in one test data set while rank- and sign-based
MANVOA were able to detect differences in outcomes for multiple data sets.
Conclusions: For data sets where the rectangular components of astigmatism
vectors do not distribute normally in both dimensions, only nonparametric
statistical methods are valid. Sign-based MANOVA was the most sensitive test
for detecting differences in non-normally distributed astigmatism outcomes in
our data sets.
185