How the Europa Tangent Lens Improved the Fit for a Patient with Corneal Scars
Visionary Optics’ new Europa Tangent lens design simplifies the fitting process by using a three-zone fitting system — allowing changes to be made to the central, limbal, or scleral zone of the design without affecting other lens parameters (in 50 µm increments, up to + 300 µm).
The Europa Tangent features contour-adjusting technology, limbal and landing curve enhancements derived from extensive profilometry data, and a softer landing zone patterned after our free-form design.
A 23-year-old female patient had multiple corneal scars on her left eye, due to stromal keratitis from a herpes simplex virus (HSV) infection. Because of the scarring and moderate to severe corneal irregularity, the patient’s best corrected vision, either with glasses or soft contact lenses, was 20/50.
The patient wanted improved vision, and her optometrist, Dr. Greg DeNaeyer, fit her with a Europa Tangent scleral contact lens. She had initially tried a free-form lens design but found it uncomfortable. The patient’s scleral elevation map showed only a 50 µm sagittal height difference of her scleral tissue, classifying her sclera as spherical.
Dr. DeNaeyer fit her with a Europa Tangent design, using a 16.5-millimeter lens with a power of -2.37 and a spherical landing zone. The patient was immediately happy with the comfort and stability of the lens. It fits evenly, without the movement or irritation that she previously experienced with the free-form lens. With her new Europa Tangent lens, the patient’s vision is now 20/20.
Learn more about the advantages of the Europa Tangent scleral lens.