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指導教授：林鴻儒 教授
報告者：江沛倉
2009.9.22
OUTLINE
Introduction
Methodology
Results
and discussion
Conclusions
INTRODUCTION

Contact lenses belong to one of the most
abundant categories of biomedical devices in
clinical use.

X-ray photoelectron spectroscopy (XPS) is a
powerful technique for determining the surface
characteristics of soft contact lenses
CW(Continuous Wear) Compositions
DD(Daily Disposable) Compositions
DW(Daily Wear) Compositions
Methodology
Were each dehydrated by one of three methods:
drying in air, drying in nitrogen and freezing
followed by freeze-drying.
 XPS analysis was performed by using a multitechnique ultra-high vacuum Imaging XPS
Microprobe system

Results and Discussion
DD (HEMA-base)
CW (Silicone-base)
DD (HEMA-base)
CW (Silicone-base)
Average SI content
Three Drying Method
Conclusions
XPS has been used as a fast and powerful
method to monitor protein deposition and
spoilage on hydrogel lenses, as well as drug
interaction with other types of materials.
 Can be used for future studies on lens
interactions with chemicals, pharmaceuticals
and tear components, as well as surface
modification of contact lens materials.

Thanks for your listening!
2009/9/22