Table of Contents - WOC 2012

FP-REF-FR 71 (8)
Management of Extreme Refractive Errors Using Femtosecond
Intralse technology
Jarade Elias (1)
1. The Dubai Mall Medical Center
Purpose: To describe the technique, safety, and visual outcome of IntraLase
use in managing unusual refractive errors that are not managed by conventional
LASIK procedure.
Patients and Methods: The technique of IntraLASIK procedure was described
in eyes with microphthalmia, coloboma of the iris and high astigmatism, eyes
after corneal incisional procedures, eyes after previous LASIK and in eyes
after penetrating keratoplasty (PKP).
Results: Two eyes with microcornea, coloboma of the iris and high astigmatism,
12 eyes after corneal incisional surgeries, 12 eyes after LASIK, 2 eyes after
PKP were treated successfully with IntraLASIK proccudre. Most of the
IntraLase parameters (bed and side cut energy, line and spot separation and
flap thickness, diameter and position) were modified accordingly in order to
prevent complication. All eyes were followed up for more than 6 months. Most
eyes achieved the intended correction of refractive errors without noticeable
serious clinical complication.
Conclusion: With adequate handling of IntraLase parameters, IntraLASIK
procedure was found to be safe and effective in treating refractive errors in
unusual clinical scenarios that used to be not amenable to conventional LASIK
procedure.\
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Humidity and Its Influence in LASIK Performed with Schwind Esiris
Costa Dacio (1) , Canamary Jr Aristofanes (2) , Ribeiro Aristofanes (2) , Santana
Regis (3)
1. Fortaleza General Hospital
2. Vision Laser
3. Juazeiro do Norte School of Medicine
Objectives: To assess the influence of temperature and relative humidity in the
refractive outcomes of laser in situ keratomileusis excimer (LASIK) performed
with Schwind Esiris.
Methods: Retrospective observational study with patients that underwent
LASIK during 1 year period (May 2008 to April 2009). We correlated the
refractive outcome of LASIK with environmental parameters: temperature and
relative humidity at the time of surgery and also with technical variables: laser
time, optical zone and number of treatments after fluence test.
Results: 113 eyes met the study criteria. Multiple linear regression analysis
showed a statistically significant correlation to relative humidity (p = 0.008)
and time of laser application (p = 0.012). The other parameters showed no
correlation with the final refractive outcome.
Conclusion: The increase in relative humidity tends to hypo correct the final
refractive result of LASIK. The room temperature does not seem to interfere
with this result.
WOC2012 Abstract Book
FP-REF-FR 71 (10)
Single Sitting PRK with C3R (Corneal Collagen Crosslinking) in
Keratoconus, Initial Results
Luthra Gaurav (1)
1. Drishti Eye Centre
Objective: To study the results, benefits and complications of single sitting PRK
with Corneal collagen crosslinking in patients with early keratoconus.
Methods: 20 eyes of 14 patients with keratoconus were taken up for
simultaneous PRK using alcohol assisted epithelium removal and mitomycin
C application for 12 seconds followed by UV crosslinking with riboflavin using
standard protocol. Exclusion criteria were thinnest pachymetry less than 450
µ and keratometry steeper than 55 D. Laser ablation was limited to maximum
50 µ central depth. Follow up ranged from minimum 6 months to 18 months.
Results: At 3 months, 16 eyes showed gain in 1 line or more of uncorrected
snellen›s visual acuity while 7 eyes showed gain in 1 line or more of best
corrected visual acuity. No patient lost any lines of visual acuity. At 6 months all
eyes showed stabilization of progression of ectasia. Significant post operative
corneal edema was seen in 2 eyes. One eye developed persistent epithelial
defect lasting 25 days.
Conclusion: Single sitting PRK with mitomycin C with simultaneous corneal
collagen crosslinking appears to be a promising approach to manage patients
with early keratoconus in initial studies.
FP-REF-FR 71 (11)
Laser in Situ Keratomileusis in Anisometropic Amblyopia in Pediatric
Patients - An Indian Experience
Kankariya Vardhaman (1) , Kankariya Prakash (1) , Kankariya Shrutika (1)
1. Department of Refractive Surgery, Sai Surya Eye Care
Purpose: To evaluate the results of LASIK surgery in paediatric anisometric
amblyopia in terms of optimal visual development and function.
Methods: A retrospective non-comparative interventional study involving 20
eyes (20 patients) with anisometropic amblyopia (intolerant/ non compliant
to glasses and contact lenses) who underwent LASIK surgery for uniocular
moderate to high myopia. Anisomyopia > 3.0 D, age less than 10 years,
informed written consent after counseling for off label nature of procedure were
included. LASIK was performed using Allegretto wavelight excimer laser and
automated Rondo microkeratome.
Results: Mean age at presentation 7.6 years (Range 5 -11 years). Mean
preoperative CCT was 524.70 u. Mean spherical equivalent was -8.475D
preop which reduced to -0.975D at last follow up. Mean correction achieved
with the excimer laser was -7.56 D. Six patients gained one line BCVA and
none lost any line on snellens. Mean Follow up was 13 months. There was no
sight threatening complications. Mean Follow up was 13 months.
Conclusion: Outcome of LASIK for anisometric amblyopia in paediatric patients
are encouraging. A large prospective study is required to determine long term
results.
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