Products / Onefit MED+

Onefit MED+ for Greater Control! Full customization in a 17.0mm diameter.

Attributes

Onefit MED+ is the same advanced scleral lens design as the original Onefit MED, but in a 17.0mm diameter to create a larger landing zone for precise scleral alignment, a soft landing on the conjunctiva, and a healthy environment for the eye. YOU CONTROL the design and fit to customize the ideal lens for each patient by selecting the parameter options for these four fitting zones:

• Central
• Mid-peripheral
• Limbal zones
• Edge Configurations

Onefit MED+ provides all the necessary parameter controls that one needs, facilitated by a highly intuitive online fitting tool, and an array of handy custom tools.

The design serves as its own platform from which Multifocal, Oblate, Front Toric, Toric Haptic, Quadrant Specific and Notched designs options are available.

Fitting Philosophy

Onefit MED+ provides all the necessary parameter controls that one needs! All this control is facilitated by a highly intuitive online fitting tool, and an array of handy custom tools.

Onefit MED+ utilizes the same fitting philosophy as the original Onefit MED scleral lens design, but with the new Onefit MED+ diagnostic fitting set.  No additional fitting guide is needed.

 

 

 

 

 

Onefit MED+ is supported by the conjunctiva and the fluid layer under the lens, rather than by the cornea. It is designed to vault the entire corneal surface including the limbal area. The clearance over the cornea can be fully customized from center to periphery optimizes oxygen transmission to the tissue, especially over the limbus where the stem cells are located. Current published work indicates that fluid layer thickness is an important concern with scleral lenses. With an estimated DK value of 80, an excessively thick fluid layer under the lens can deprive the cornea and stem cells of sufficient oxygenation.

Keeping the Harvitt-Bonanno and Holden-Mertz criteria in mind, Onefit MED has been designed to maximize oxygen transmission when combining the lens and tear layer thickness.  Its unique geometry and design option reduces the thickness of the tear layer from the center out to the limbal area.  Optimum results in fit and corneal health are achieved by minimizing lens thickness (between 200-250 microns) combined with clearance of 150 to 175 microns at the apex of the cornea, or in the area where the cornea is steepest (e.g. host-graft corneal junction) with optimal limbal clearance at 40 microns. The lens peripheral edge should align with the conjunctiva. Onefit is manufactured in materials offering a minimum permeability of 100 DK.