Table of Contents - WOC 2012

WOC2012 Abstract Book
PO-CAT-84
Systematic Approach to Secondary Posterior Chamber IOL
Implantation
Mazhry Zia (1)
1. Assistant Professor WAPDA Teaching Hospital and Central Park medical
College
Objective: The ophthalmologist should be able to:
• Plan a surgical intervention when faced with Uniocular or binocular aphakia
needing a secondary PC IOL Implant.
• Classify and describe the different clinical presentations and appropriate
surgical technique for secondary PC IOL Implantation
• Identify and manage the most frequent Intraoperative and post operative
complications encountered in secondary PC IOL Implantation.
Synopsis: Secondary PC IOL implantation in aphakics is an established
procedure. Variation of surgical procedure is required to manage different
situations. The status of posterior capsule may vary from intact to partially
deficient or totally absent. Similarly the technique has to be varied from simple
implantation to synechiolysis to anterior vitrectomy combined with single
or double haptic trans-scleral fixation of PC IOL. This course will present
simplified approach to manage secondary IOL implantation.
Education Level: Intermediate
Course Format: lecture
Target Audience: General
Course Length: 1 hour
The Course Outline: Will be discussed in three main Parts under following
headings:
Part 1 Background and classification
Part 2 Clinical and surgical skills
Part 3 To review and interact
It contains: 18 original clinical photographs. 17 original graphics and 8 surgical
videos
Contact Lens and Refractive Error
PO-CLR-01
Cytotoxicity of Colour Soft Contact Lenses
Almesmary Abulgasim Adam (1) , El-bargathi Adem (2) , Abdulmagid Goma (3) ,
Fathalla Alfaituri (1) , Mokhl Maha (2)
1. Omar Almukhtar University
2. Gar Younis University
3. Omar Almukhtar University
Laboratory tests on the returned lenses to study toxicity. We thought that the
changed chemical composition when the atin was added could be› the cause
of this intolerance. From a number of possible alternative methods, we used
a test at the cellular level and a test of membrane activity. These tests are
generally used to find cytotolerance of implantation materials. We think on the
basis of the results of the test that the investigated lenses are not toxic to the
cells cultivated in vitro and for that reason the intolerance of these coloured soft
lenses has a different cause than their changed composition.
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PO-CLR-02
Influences of Cycloplegia with Topical Atropine on Ocular and
Corneal Aberrations
Hiraoka Takahiro (1) , Miyata Kazunori (2) , Nakamura Yasuko (2) , Miyai Takashi
(2) (1)
, Oshika Tetsuro
1. Department of Ophthalmology, Institute of Clinical Medicine, University of
Tsuk
2. Miyata Eye Hospital
Purpose: To Investigate the influence of topical atropine on higher-order
aberrations (HOAs) in children.
Methods: Forty-two eyes of 23 subjects (5.74 ± 2.31 years old, mean ± SD)
with hyperopia were enrolled in this study. We evaluated refraction and
wavefront aberration before and after cycloplegia with topical instillation of 1%
atropine solution for one week. Ocular and corneal HOAs were simultaneously
measured. Individual Zernike components up to the sixth order were also
analyzed for a 6-mm pupil. These parameters were compared before and after
cycloplegia.
Results: Hyperopic refractive error significantly increased after cycloplegia (P
< 0.0001, paired t test). Ocular HOAs also increased after cycloplegia (P =
0.0028), whereas corneal HOAs did not change. When ocular and corneal
HOAs were compared, corneal HOAs were significantly larger than ocular
HOAs before cycloplegia (P < 0.05). As for individual Zernike components,
significant changes were found in C31, C40, C51, and C55 after cycloplegia
(P < 0.05).
Conclusion: Cycloplegia with atropine significantly increases refractive errors
and ocular HOAs in children with hyperopia, resulting in reduction in optical
quality of the eye. Physiological tonic accommodation appears to help improve
retinal image quality by reducing HOAs as well as refractive errors.
PO-CLR-03
Culture-Proven Contact Lens-Related Corneal Ulcers in Singapore
Wang Jenn Chyuan (2,3) , Ting Darren SJ (1) , Sevilla-Ebreo Marilou (3)
1. Ayr Hospital
2. Singapore National Eye Centre
3. Yong Loo Lin School of Medicine, National University of Singapore
Objective: To examine the microbiological profiles and the antibiotic sensitivity
of contact lens-related corneal ulcers (CLCU) in Singapore.
Methods: A retrospective review of all culture-proven CLCU cases presented to
National University Hospital, Singapore between January 2005 and December
2008 (a 4-year period) was performed. Data pertaining to the microbiological
profiles and the antibiotic susceptibility and resistance were examined.
Results: A total of 130 culture-proven CLCU cases were identified. 133
organisms were isolated. The distribution of organisms, in order of
decreasing frequency, was gram-negative organisms (119, 89.5%), grampositive
pathogens (10, 7.5%) and fungal pathogens (4, 3%). Pseudomonas
aerugonisa was shown to be the single most common causative pathogen
(104, 78%), constituting 90% of the gram-negative organisms identified. No
parasitic pathogen was isolated. Organisms were most sensitive to gentamicin
(120, 90.2%), followed by ciprofloxacin (116, 87.2%) and ceftazidime (113,
85%).Minimal antibiotic resistance was noted.
Conclusion: Pseudomonas aeruginosa remains the leading causative
organism of contact lens-related corneal ulcers in the Singapore population.
Both monotherapy and combined therapy serve as sensitive empirical
treatment. There was no emerging antibiotic resistance identified in this
community.