Preservative-free carboxymethyl cellulose drops modestly increased tear break-up time and produced small corneal epithelial changes in screen-exposed patients.
To evaluate the effects of preservative-free artificial tears on tear film stability and corneal epithelial changes in patients with dry eye disease due to prolonged screen exposure.
Approach:
Key Findings:
Mean NIBUT improved from 6.52 seconds at baseline to 7.89 seconds after treatment.
Central corneal epithelial thickness increased from 52.79 μm to 53.65 μm, a mean increase of 0.86 μm.
A significant negative correlation was found between daily screen time and tear film stability.
Interpretation:
The study suggests that preservative-free artificial tears can modestly improve tear film stability and induce small structural changes in the corneal epithelium among patients with dry eye disease related to screen use.
Limitations:
Single-arm study design limits causality conclusions.
Short follow-up period restricts assessment of long-term benefits.
The predictive model for epithelial thickening may be underpowered due to the number of covariates.
Conclusion:
Early intervention with lubricating therapies may help mitigate ocular surface dysfunction associated with increased screen exposure in modern lifestyles.
This week's research makes one thing clear: who someone is before they get sick — their relationships, their partner's health, the back of their eye — is doing a lot of work medicine is only beginning to account for.
