Effect of Lens Base Curve on Subjective Comfort and Assessment of Fit with Silicone Hydrogel Continuous Wear Contact Lenses

Key Points

• The research aims to determine how different base curves affect the comfort and fit of silicone hydrogel contact lenses.
• Trial fitted subjects with 8.6-mm base curve lenses first.
• Switched to 8.4-mm lenses if discomfort or poor fit was reported.
• Assessed comfort and fit after 15 minutes.
• Measured steep keratometry (K) readings for lens fitting.
• 74.2% of eyes were fitted with 8.6-mm lenses, while 23.7% required 8.4-mm lenses.
• Eyes fitted with 8.6-mm lenses had a mean K reading of 43.88 D, while those with 8.4-mm had 45.56 D (p < 0.001).
• 77% of eyes with a steep K of ≥45.50 D needed the 8.4-mm lens for better comfort.
• Mean comfort scores increased significantly from 6.33 to 9.44 when switching from 8.6-mm to 8.4-mm lenses (p < 0.001).