Objective:

To quantify the effect of landing zone modifications on tear exchange during short-term scleral lens wear.

Key Findings:

• The peripheral channel lens design showed greater fluorescent intensity compared to the notched design and toric control lens, especially in the corneal periphery.
• The notch design exhibited reduced fluorescent intensity, indicating lower tear exchange.
• The channel design resulted in increased tear ingress, suggesting improved tear dynamics.

Interpretation:

Channel modifications in scleral lenses enhance short-term tear exchange by potentially creating a preferential flow pathway, which may reduce complications associated with lens wear.

Limitations:

• The study involved a small sample size of nine participants.
• Results are based on short-term wear and may not reflect long-term outcomes.

Conclusion:

Channel modifications in scleral lenses may guide future innovations in lens design to improve tear exchange and reduce complications.