Clinical performance and fitting characteristics with a multicurve lens for keratoconus

Area of Science:

• Ophthalmology
• Optometry
• Corneal Disease

Background:

• Keratoconus is a progressive corneal ectasia.
• Contact lens correction is essential for visual rehabilitation in keratoconus.
• Optimizing lens fitting is crucial for patient comfort and visual outcomes.

Purpose of the Study:

• To assess the clinical outcomes of multicurve contact lenses for keratoconus in a Korean population.
• To evaluate the fitting characteristics and patient tolerance of these lenses.

Main Methods:

• Sixty eyes with keratoconus were fitted with multicurve lenses.
• Lens fitting was guided by topographic indices and slitlamp examination.
• Visual acuity, comfort, wearing time, and topographic changes were evaluated over a mean follow-up of 11.4 months.

Main Results:

• 71.6% of eyes achieved visual acuity of 20/30 or better, with flatter base curve radius (BCR) correlating with better vision.
• 94% tolerated lens fitting, and 85% reported comfort, with a mean daily wear time of 11.9 hours.
• No significant worsening of keratoconus progression (Sim K changes) was observed.

Conclusions:

• Customized multicurve lenses provide comfortable and effective vision correction for keratoconus.
• Lens fitting parameters, including Sim Kmax and BCR-to-peripheral curve radius relationship, are key for optimizing performance.
• The study suggests multicurve lenses do not aggravate keratoconus progression.