Bandage soft contact lens barrier function: a clinical research note.

Area of Science:

• Ophthalmology
• Biomedical Engineering

Background:

• Corneal thickness is critical for refractive surgery outcomes.
• Diurnal variations can affect corneal thickness measurements.
• Bandage contact lenses are used post-operatively for protection.

Purpose of the Study:

• To investigate the effect of bandage soft contact lenses on post-operative corneal thickness.
• To determine if lens displacement influences corneal hydration.
• To elucidate the role of bandage lenses in preventing corneal edema.

Main Methods:

• Corneal thickness was measured pre- and post-operatively in 18 subjects undergoing laser refractive surgery.
• Measurements accounted for diurnal variations.
• Subjects were categorized based on retention or loss of overnight bandage lenses.

Main Results:

• Subjects who lost bandage lenses showed uniformly thick, swollen corneas (edema).
• Subjects who retained bandage lenses maintained a stable corneal thickness profile.
• Reapplication of bandage lenses in affected subjects normalized corneal thickness by day 2.

Conclusions:

• Bandage soft contact lenses provide a crucial fluid barrier, preventing corneal edema.
• This barrier function supports the corneal endothelial pump in managing fluid balance.
• The findings explain the efficacy of bandage lenses in managing conditions like corneal bullous.