The IS19 scleral has a landing diameter of 15.00mm which will bridge the total corneal diameter in almost all cases. The fitting reference sagittal height of trial lenses is given for this diameter.
A scleral lens designed for safe long-term wear
• 13-lens trial set K0 to K12; The sagittal height at 15.00 ranges from 2950 microns [μm] (K0) to 4750 microns (K12);
• Diameter at which the lens touches down on the sclera (the ‘Landing Diameter’) is
15.00mm; the lens is defined by the sagittal height at this diameter;
• All elevation control adjustments are independent; adjusting, for example, the limbal clearance will not affect apical clearance or scleral alignment;
• A defining feature of the IS19 scleral is that the sag at the landing diameter may be varied in each quadrant to provide true multi-elevational control of the fitting;
• The integrated scleral landing zone is adjustable in the four principal quadrants to provide near-perfect scleral alignment;
• Limbal clearance independently adjustable in 50μm steps
• Toric and quadrant-specific (scleral alignment adjustable independently in four quadrants) adjustments are standard to provide the perfect fit for any eye
• Oblique over-refraction may be incorporated in a lens with an established fit
• Bifocal / multifocal options are available
• High definition optics available as an option for spherical and toric powers
• High Order Aberration Management: spherical aberration
• Diameter at which the lens touches down on the sclera (the ‘Landing Diameter’) is
15.00mm; the lens is defined by the sagittal height at this diameter;
• All elevation control adjustments are independent; adjusting, for example, the limbal clearance will not affect apical clearance or scleral alignment;
• A defining feature of the IS19 scleral is that the sag at the landing diameter may be varied in each quadrant to provide true multi-elevational control of the fitting;
• The integrated scleral landing zone is adjustable in the four principal quadrants to provide near-perfect scleral alignment;
• Limbal clearance independently adjustable in 50μm steps
• Toric and quadrant-specific (scleral alignment adjustable independently in four quadrants) adjustments are standard to provide the perfect fit for any eye
• Oblique over-refraction may be incorporated in a lens with an established fit
• Bifocal / multifocal options are available
• High definition optics available as an option for spherical and toric powers
• High Order Aberration Management: spherical aberration
IS19 Key Features
We predominantly work with Contamac Extreme materials ensuring high quality standards but are open to using others if desired
Specification
Other products
It is agreed that a scleral lens needs to vault over cornea and the limbus. We now know that the
diameter of the average cornea and limbus is significantly larger than indicated by previously quoted
measures which have been based on horizontal visible iris diameter, providing limitedacknowledgement of limbal width and its inclusion as part of the corneal diameter.
It follows that the diameter of the cornea together with the limbus should have a considerable impact on the diameter at which a scleral lens touches down on the sclera - the so-called 'landing zone diameter' - in order to promote safe long term wear.
The key sagittal height dimension for scleral lenses should be the sag at the landing zone diameter; the sag at the total diameter is then a secondary dimension which depends on how the scleral alignment zone is tailored to align with the sclera.
The IS19 scleral has a landing diameter of 15.00mm which will bridge the total corneal diameter in almost all cases. The fitting reference sagittal height of trial lenses is given for this diameter.
diameter of the average cornea and limbus is significantly larger than indicated by previously quoted
measures which have been based on horizontal visible iris diameter, providing limitedacknowledgement of limbal width and its inclusion as part of the corneal diameter.
It follows that the diameter of the cornea together with the limbus should have a considerable impact on the diameter at which a scleral lens touches down on the sclera - the so-called 'landing zone diameter' - in order to promote safe long term wear.
The key sagittal height dimension for scleral lenses should be the sag at the landing zone diameter; the sag at the total diameter is then a secondary dimension which depends on how the scleral alignment zone is tailored to align with the sclera.
The IS19 scleral has a landing diameter of 15.00mm which will bridge the total corneal diameter in almost all cases. The fitting reference sagittal height of trial lenses is given for this diameter.
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Frequent Replacement Lenses
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