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Related Experiment Videos

[Tear film changes after phacoemulsification].

Zuguo Liu1, Lihui Luo, Zhenping Zhang

  • 1Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangzhou 510060, China. zuguol@yahoo.com

[Zhonghua Yan Ke Za Zhi] Chinese Journal of Ophthalmology
|July 23, 2002
PubMed
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Phacoemulsification significantly impacts tear film stability, leading to reduced tear break-up time and dry eye symptoms in some patients. Pre-existing tear instability increases postoperative dry eye risk.

Area of Science:

  • Ophthalmology
  • Corneal Science

Background:

  • Phacoemulsification is a common cataract surgery technique.
  • Understanding its effects on the ocular surface is crucial for patient management.

Purpose of the Study:

  • To evaluate the impact of phacoemulsification on tear film parameters.
  • To identify risk factors for postoperative dry eye.

Main Methods:

  • Prospective randomized study of 68 patients (79 eyes) undergoing phacoemulsification.
  • Preoperative and serial postoperative measurements of tear break-up time, Schirmer I test (SIt), corneal staining, tear film pattern, and tear meniscus height.

Main Results:

  • Significant reduction in tear break-up time and increase in SIt, tear meniscus height, and corneal staining at 1-2 days postoperatively.

Related Experiment Videos

  • Most parameters returned to baseline by 30 days, but 19.3% had reduced tear break-up time and SIt.
  • 1/9 patients with normal preoperative tear film developed dry eye; those with preoperative tear break-up time <10 seconds had higher risk of instability.

    • Conclusions:

    • Phacoemulsification causes significant, though often temporary, alterations in tear film parameters.
    • A subset of patients may experience persistent dry eye symptoms post-surgery.
    • Preoperative tear film quality, particularly tear break-up time, is a key predictor of postoperative outcomes.