Effect of Pre and Post Operative PRK and PRK Stream Light on Tear Film Stability: Effect of Pre and Post Operative PRK and PRK Stream Light on Tear Film Stability

Fatima; Ummara Shafiq; Athar Habib; Ayesha Shafiq; Hamdan Tariq; Irfana Bibi; Aneesa Akbar; Komal Mushtaq

doi:10.61919/jhrr.v4i3.1438

Authors

Fatima Department of Rehabilitation Sciences, Superior University, Lahore, Pakistan.
Ummara Shafiq Department of Ophthalmology, Superior University, Lahore, Pakistan.
Athar Habib Department of Optometry & Vision Sciences, University of Lahore, Lahore, Pakistan.
Ayesha Shafiq Department of Optometry, Superior University, Lahore, Pakistan.
Hamdan Tariq College of Ophthalmology and Allied Vision Sciences, King Edward Medical University, Lahore, Pakistan.
Irfana Bibi College of Ophthalmology and Allied Vision Sciences, King Edward Medical University, Lahore, Pakistan.
Aneesa Akbar Department of Optometry & Vision Sciences, University of Lahore, Lahore, Pakistan.
Komal Mushtaq Department of Optometry & Vision Sciences, University of Lahore, Lahore, Pakistan.

DOI:

https://doi.org/10.61919/jhrr.v4i3.1438

Keywords:

PRK, Trans PRK, Schirmer II Test, Tear Film Break-Up Time, Tear Film stability, Schirmer’s Test, Refractive error, Dry Eye Disease, Tear Break Up Time

Abstract

Background: Tear film instability can lead to dry eye disease, which is a common complication following refractive surgeries such as Photorefractive Keratectomy (PRK) and Transepithelial PRK (Trans-PRK).
Objective: This study aimed to evaluate the effects of PRK and Trans-PRK on tear film stability using the Tear Break-Up Time (TBUT) test and Schirmer II test.
Methods: A quasi-experimental study was conducted at the National Eye Center, Lahore, including 100 patients aged 18-30 years undergoing PRK or Trans-PRK. Tear film stability was assessed before and after surgery using TBUT and Schirmer II tests. Data were analyzed using SPSS version 25, applying paired t-tests to compare pre- and post-surgery outcomes.
Results: Significant reductions were observed in TBUT and Schirmer II test values after PRK (mean difference: 4.80, p < 0.001; 4.86, p < 0.001) and Trans-PRK (mean difference: 3.06, p < 0.001; 2.96, p < 0.001), indicating increased eye dryness post-surgery.
Conclusion: Both PRK and Trans-PRK significantly reduced tear film stability, increasing the risk of dry eye symptoms. Proper patient assessment and post-operative care are essential to mitigate these risks.

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Effect of Pre and Post Operative PRK and PRK Stream Light on Tear Film Stability