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Changes in tear protein pattern after photorefractive keratectomy
1First Department of Ophthalmology, Faculty of Medicine, Semmelweis University, Budapest, Hungary.
European Journal of Ophthalmology
|September 2, 2003
Summary
Photorefractive keratectomy (PRK) significantly alters tear protein composition, decreasing key proteins like lactoferrin and lysozyme. These changes may cause postoperative dry eye and reduced tear film stability.
Area of Science:
- Ophthalmology
- Biochemistry
- Corneal Surgery
Background:
- Photorefractive keratectomy (PRK) is a common refractive surgery.
- Tear film stability and composition are crucial for ocular surface health.
- Understanding post-PRK ocular surface changes is important for patient management.
Purpose of the Study:
- To analyze changes in tear protein composition after photorefractive keratectomy (PRK).
- To investigate the acute effects of excimer laser ablation on lacrimal gland secretion.
Main Methods:
- Tear samples collected from 23 patients before and 4 days after PRK.
- Proteins separated using sodium dodecyl sulfate-polyacrylamide gel electrophoresis (SDS-PAGE).
- Electrophoretic data analyzed using BioDoc-Analyze software.
Main Results:
- Significant differences in tear protein patterns were observed post-PRK (p < 0.001).
- A significant decrease in lactoferrin, immunoglobulin A heavy chain, and lysozyme was detected (p < 0.005).
Conclusions:
- Excimer laser ablation acutely affects lacrimal gland protein secretion.
- Post-PRK tear composition changes may contribute to dry eye symptoms.
- Reduced tear film stability is a potential consequence of these protein alterations.