Table of Contents - WOC 2012

FP-REF-TH 35 (9)
Orbscan as a Prerequsist for Laser Sub Epithelial Keratomeliuses
Khan Saeed (1) , Saeed Tariq (1)
1. University of Punjab
Purpose: To assess the effectiveness and accuracy of orb scan in detecting
hidden lesion of cornea in treating mild to moderate cases of myopia .
Method: 40 patients were selected from the opd of Ch Rehmat Memorial
hospital for the correction of myopia by lasek technique.
Result: This retrospective study comprised of eighty eyes of 40 patients; two
groups were made. Eyes belonging to group 1 with pre-operative myopia range
-1.00 to -3.00 diopter with 0.75 to 1.50 diopter cylinder. In group 2 of forty eyes
with pre of operative myopia range -3.00 to -6.00 diopter with -1.50 to -3.00
diopter cylinder. Thirty two (80%) were female and 8 (20%) were male. Mean
age of the patient was 28 years range from 20 to forty years. The orb scan was
used as the mandatory tools for the assessment of corneal pathology instead
of routine corneal topography. This revealed that in 3 patients had posterior
keratoconous and 1 had pellucid marginal degeneration and 2 with low central
corneal thickness.
Conclusion: Orb scan is an effective tool in pre-operative assessment of hidden
corneal defects in cases of myopia undergoing LASEK surgery.
FP-REF-TH 35 (10)
Crosslinking Dosage and Safety Optimization for Lasik Xtra
Muller David (1) , Marshall John (1)
1. Avedro
Objective: Several ongoing studies point to corneal crosslinking as a viable
method of reversing post-lasik ectasia. This study shows a method to
incorporate crosslinking into a standard lasik procedure as a way to potentially
prevent post-lasik ectasia.
Purpose: To optimize dosage for corneal crosslinking used intra-operatively in
the lasik surgery as a method for the prophylactic prevention of post-lasik
ectasia complications (Lasik Xtra)
Methods: Various strength testing methods were used in pre and post-lasik
eyes and in vitro experiments at the Institute of Moorfield›s Eye Hospital in
London and at Avedro, Waltham, USA
Results: It was shown that only 30% of a normal cross-linking dose is required
to return a post-lasik cornea back to its pre-lasik strength.
Conclusions: Accelerated corneal crosslinking administered intra-operatively
during the lasik procedure appears to be a promising method of returning
strength to corneas weakened by lasik, possibly reducing long term instability
and requiring only a minimal interruption to a normal lasik workflow.
WOC2012 Abstract Book
Free Paper: Retina - Medical
Thu 16 Feb 14:30 - 16:00 Conference Room A4
FP-RET-TH 36 (1)
Assessment of the Safety-enhanced Protocol of Photodynamic
Therapy (PDT) in the Management of Chronic and Recurrent Cases
of Central Serous Chorioretinopathy (CSC)
Kabeel Mamdouh (1)
1. Magrabi Hospital
Central Serous Chorioretinopathy (CSC) is characterized by the development
of serous neurosensory retinal detachment at the posterior pole. Two groups
were recruited in this study. Group I includes 10 eyes treated with the modified
PDT protocol. The other group which is group II includes 8 eyes followed up
for another 6 months without any interference. The safety enhanced PDT
protocol using half the normal dose Verteporfin infusion, which was infused
over 8 minutes followed by laser at 692 nm at 10 minutes a total light energy
of 50 joules/cm2 over 83 seconds. In group I, By comparing the pre-treatment
BCVA to the post-treatment BCVA, there was a significant difference, also the
pre-treatment to the post treatment CFT was statistically significant difference.
In group II, by comparing the pre-operative to the final follow-up BCVA, there
was no statistical significant difference, also the pre-study with the final CFT
at 6 months, there was also no statistical significant difference. As regards
the complication following the PDT treatment, we only recorded one eye in
group I that developed an area of choroidal hypoperfusion. PDT with the safety
enhanced protocol for treatment of cases with chronic CSC is superior to nontreatment
option.
FP-RET-TH 36 (2)
Two-Year Outcomes of IA-guided PDT Combined with Intravitreal
Bevacizumab and Subtenon Triamcinolone Acetonide for Polypoidal
Choroidal Vasculopathy
Sakai Tsutomu (1) , Ohkuma Yasuhiro (1) , Hayashi Takaaki (1) , Watanabe Akira
(1) (1)
, Tsuneoka Hiroshi
1. Jikei University School of Medicine
Purpose: To evaluate the efficacy of triple therapy consisting of single-session
indocyanine green angiography (IA)-guided photodynamic therapy (PDT),
intravitreal bevacizumab (IVB) and subtenon triamcinolone acetonide (STTA)
as initial therapy in polypoidal choroidal vasculopathy (PCV).
Methods: Best corrected visual acuity and central macular thickness (CMT)
were assessed at 3, 6, 12 and 24 months. Repeat injections of IVB
were performed based on fluorescein angiographic findings of choroidal
neovascularization leakage.
Results: 15 eyes of 15 patients were analyzed. At 24 months, 70% showed
gaining vision and reduction of CMT. No one had retreatment of triple therapy.
IVB injections were repeated twice in five eyes.
Conclusion: Initial therapy consisting of single-session PDT combined with IVB
and STTA improves vision and macular morphology in PCV.
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