Sagittal Depth Considerations in the Selection of the Base Curve Radius of a Soft Contact Lens

Key Points

• To investigate the relationship between corneal sagittal depth and the selection of base curve radii for soft contact lenses.
• Examined the relationship between sagittal depth of the cornea and contact lens fitting.
• Developed a new system for selecting base curves.
• Ensured even coverage of sagittal depths clinically encountered.
• Set sagittal increment between adjacent base curves to 0.1 mm.
• Identified that base curves may not be well chosen based on sagittal depth.
• Proposed a systematic approach to select a range of base curves.