Diurnal Variations in Corneal Curvature After the Wearing of Contact Lenses

Key Points

• The aim is to understand how the curvature of the cornea changes throughout the day after wearing contact lenses.
• Tested five habitual contact lens wearers
• Measured corneal curvature before and after lens insertion
• Evaluated changes at 4, 8, and 16 hours of wear
• Mean horizontal curvature increased by 0.71 D after 4 hours
• Mean horizontal curvature increased by 0.84 D after 8 hours
• Mean horizontal curvature increased by 0.55 D after 16 hours
• Mean vertical curvature increased by 0.52 D after 4 hours
• Mean vertical curvature increased by 0.50 D after 8 hours, and by 0.38 D after 16 hours