Knowledge Base
2. Linking EyeSpace to your topographer

4. History and Development

12. EyeSpace Scleral practitioner and patient resourcesCharl Laas

The use of Scleral lenses for patients with irregular cornea such as Keratoconus has significantly increased in the last decade. This can be attributed to the introduction of high oxygen permeable materials, improved manufacturing technology, the development of lens designs, and easier fitting techniques.

In designing the EyeSpace Scleral lens range, extensive research was undertaken to ensure optimum fitting characteristics. Optical Coherence Tomography (OCT) imaging and Corneal Topography was used to measure and analyze the corneal, limbal and scleral shape, and to assess prototype Scleral contact lenses during development. Applying these high resolutions, and micron precision technology’s resulted in significant advances in the measurement of para-limbal scleral geometry, corneal/limbal/scleral toricity, lens thickness profiles, non-rotationally symmetric lens geometries and scleral contact lens flexure.

A key focus in the development of the EyeSpace Scleral lens range was to create contact lens parameters that are easy to calculate, order and troubleshoot. Traditional nomenclature such as back optic zone radius (BOZR, in mm), diameter, and back vertex power (BVP, sphero-cylindrical notation, in D) was maintained.

Rather than describing a series of peripheral curves in zone diameter, radius of curvature, eccentricity or tangent angles, the EyeSpace Scleral lens is noted in sagittal height to control the depth, and therefore the apical clearance of the lens. This, in turn, enables contact lens practitioners to quickly, and accurately design and order a Scleral contact lens that promotes excellent corneal health, stable vision, and all day comfort.

The EyeSpace Scleral lens range is available in a wide range of high oxygen permeable contact lens materials including Optimum Extra,