Table of Contents - WOC 2012

WOC2012 Abstract Book
FP-REF-TH 21 (4)
Combined Crosslinking and Posterior Chamber Phakic Intraocular
Lens to Correct Keratoconus
El-Moatassem Kotb Ahmed (1)
1. International Medical Center
Purpose: To assess the safety efficacy and predictability of combined
crosslinking and toric implantable collamer lenses in keratoconus.
Methods: This prospective study comprised 18 consecutive keratoconic eyes
of 9 patients with stage I -III keratoconus implanted with phakic intraocular
lens after 12 month of crosslinking applications to stabilize the cone. Outcome
was Uncorrected (UDVA) and corrected (CDVA) distance visual acuities,
refraction, and postoperative complications were evaluated 1, 3, 6, and 12
months postoperatively.
Results: Preoperatively, the mean spherical equivalent in the 18 eyes (9
patients) was -10.13 diopters (D) (range -3.5 to -14.5 D) and the mean cylinder,
-3.67 D. (range -1.75 to -6.00 D). The uncorrected visual acuity was 20/40 or
better in all cases and 60 % 20/22 or better. At 12 months, mean postoperative
spherical equivalent was +0.36 D, mean cylinder of -0.93 D. No eyes lost
more than 2 lines of CDVA; 29 eyes (96.7%) maintained or gained 1 or more
lines. The efficacy index was 1.07 and the safety index, 1.16. There were no
complications or adverse events.
Conclusions: Combined crosslinking and toric implantable collamer lenses
(toric ICLâ„¢, STAAR Surgical) is a predictable and effective procedure for the
correction keratoconus.
FP-REF-TH 21 (5)
Prevalence of Corneal Astigmatism in Patients Attending for Routine
Cataract Surgery at a Teaching Hospital in the United Kingdom
Khan Mohammad Irfan (1) , Muhtaseb Mohammed (1)
1. Singleton Hospital Abertawe Bro Morgannwg University NHS Trust
Purpose: To analyze and quantify the pattern of corneal astigmatism in patients
awaiting cataract surgery and to establish the demand of toric intraocular lens
(IOL) in our unit.
Setting: Singleton Hospital Abertawe Bro Morgannwg University NHS Trust,
Swansea, United Kingdom
Methods: Keratometric measurements of all patients attending the preassessment
clinic over a 4 month period were prospectively collected and
analyzed.
Results: A total of 1230 eyes of 746 patients with a mean age of 75.54 (SD
=10.71) were include. In 24.47% of eyes corneal astigmatism was 0.5 dioptres
(D) or less; in 79.5% corneal astigmatism was 1.5D or less; in 4.61% it was
more than 2.5D and in 1.93% of eyes corneal astigmatism was 3D or more.
Conclusion: This study shows that 40.41% of patients attending for routine
cataract surgery in our population have more than 1 D of astigmatism. The
results are helpful for the hospitals to analyze the demand and cost of using
toric IOL in these patients with corneal astigmatism.
30
FP-REF-TH 21 (6)
Management of Anismetropia in Children (Role of Implantable
Contact Lens)
Sadiq Naqaish (1)
1. Islamabad Medical and Dental College Islamabad
Objective and Purpose: To evaluate efficacy and safety of Implantable contact
Lens (ICL) in children suffering from Anisometropic amblyopia.
Methods: We implanted ICL in three children (all under sixteen years of age),
one female and two males. All had Anisometropic amblyopia (two myopes
and one hypermetrope). According to protocol suggested by manufacturers
(Staar Surgical) uncorrected visual acuity(UCVA), best corrected visual acuity
(BCVA), anterior chamber depth from corneal endothelium to anterior lens
capsule (Orbscan), white to white corneal diameter (manual and Orbscan
both) intaocular pressure (IOP) were recorded. Relevant data was submitted
to Staar Surgical for custom manufacture of posterior chamber ICL. Each
individual was implanted with custom made ICL.
Results: All patients had uneventful surgery and no significant anterior chamber
reaction or intraocular pressure fluctuations were observed. All had dramatic
improvement in BCVA in amblyopic eye.
Conclusion: ICL is a safe and effective treatment in pediatric age group
suffering from anisometropic amblyopia.
FP-REF-TH 21 (7)
Successful Predictive Factors in the Treatment of Keratoconus Using
Keraring
Arbelaez Maria Clara (1)
1. Muscat Eye Laser Center
Purpose: To compare results and determine which study factors predict
successful outcomes after implantation of Keraring intrastromal corneal rings
segments (Mediphacos, Bela Horizonte, Brazil) using a Ziemer Femto LDV
(Ziemer Group AG, Port, Switzerland).
Methods: A retrospective, non-randomized study involving 83 eyes (42 OS and
41 OD) with clinically significant keratoconus. Patients with a loss of BCVA and
contact lens intolerance were included in the study. Keraring implantation was
done according to the manufacturer’s nomogram version 4.0. A tunnel incision
was created using the Ziemer Femto LDV laser. The mean follow-up time was
6 months for all patients.
Results: All variables improved after Keraring implantation with the Ziemer
Femto LDV with approximately 98% of eyes achieving an improvement in
uncorrected visual acuity, 93% achieving a reduction in cylinder and spherical
equivalent, while the mean average K value improved in 92%.
Conclusion: Each of the study variables offers only moderate predictive value
and should not be used on its own for patient selection. However, used
collectively and alongside the clinical assessment, they can help in the
selection of candidates for Keraring implantation. Overall, there is the potential
for good outcomes in patients with mild to moderate keratoconus.