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The Changes of Tear Status after Conventional and Wavefront-Guided IntraLASIK
Say Kiang Foo1, Sharanjeet Kaur, Faudziah Abd Manan
1Faculty of Optometry & Vision Sciences, SEGi University College, No. 9, Jalan Teknologi, Kota Damansara, 47810 Petaling Jaya, Selangor, Malaysia.
The Malaysian Journal of Medical Sciences : MJMS
|December 3, 2011
Summary
IntraLASIK surgery, including wavefront-guided (WG) and conventional methods, did not significantly alter tear status up to three months post-operation. WG IntraLASIK showed no advantage over conventional techniques in preserving tear film quality.
Area of Science:
- Ophthalmology
- Refractive Surgery
- Ocular Surface Disease
Background:
- IntraLASIK utilizes the IntraLase femtosecond laser for corneal flap creation.
- Previous studies have explored the impact of LASIK on ocular surface health.
- Understanding tear film changes is crucial for assessing post-LASIK outcomes.
Purpose of the Study:
- To compare tear status changes after conventional IntraLASIK (PlanoScan and Zyoptix Tissue Saving algorithms) and wavefront-guided (WG) IntraLASIK.
- To evaluate the effects of different IntraLASIK algorithms on pre-corneal tear film characteristics.
Main Methods:
- Tear status was assessed in 36 patients undergoing three types of IntraLASIK.
- Evaluated parameters included tear lipid layer thickness, non-invasive tear break-up time, and tear meniscus height.
- Statistical analysis employed repeated measures ANOVA and one-way ANOVA.
Main Results:
- No significant changes in tear lipid layer thickness, non-invasive tear break-up time, or tear meniscus height were observed at 1 and 3 months post-IntraLASIK across all groups.
- Blinking rate and palpebral aperture remained unchanged post-surgery.
- No significant differences in tear status were found among the PlanoScan, Zyoptix Tissue Saving, and WG IntraLASIK groups.
Conclusions:
- Conventional and WG IntraLASIK do not adversely affect tear status up to three months post-surgery.
- Wavefront-guided IntraLASIK offers no significant advantage over conventional methods in preserving tear status.
- IntraLASIK procedures appear to be safe for the ocular surface in the short term.
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