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Introduction
David
Thomas are the exclusive licensed manufacturer and distributor
of the Rose K2, Rose K2 keratoconus System and Rose K2 PG
(Post Graft) in the United Kingdom and Ireland. We also
export Rose
K lenses to many countries throughout the world.
The
Rose K2™ Keratoconus Lens System was developed by
Dr Paul Rose OD FNZCLS over a period of five years. The
lens design came
out of the need for Dr Rose to manage his numerous Keratoconus
patient base in a timely and cost effective manner. |
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The
fitting system that he developed incorporates easy
fitting for the
practitioner, while giving the patient increased lens
comfort and better visual acuity. Over
the last few years the Rose K2™ fitting system
has become the leading choice
for many practitioners throughout the world. Rose
K™ International, the patent holders for the design,
actively encourage with their manufacturing partners
a policy of continuous improvement.
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The
introduction of the latest aspheric technology giving precise
control over the power curves has
resulted in the enhancement
of Rose K™ to achieve aberration controlled optics.
The combination of the Rose K™ proven design together
with sophisticated aberration control provides your Keratoconus
patients with the ultimate lens - The Rose K2™.
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Rose 'K2™'
design
COMPLEX Lens Geometry, combined with
the most advanced materials available make the Rose K2™ lens the better fit for superior
patient comfort and visual acuity. Multiple parameters make fitting
the Rose K2™ lens easy, for reduced chair time and increased
practice efficiency. The Rose K2™ Keratoconus Lens uses
a decreasing back central optic diameter as the base curve steepens.
The ratio is set but is dependent on base curve and diameter.
Three standard edge lifts are offered which will accommodate approximately
85% of all Keratoconus fits:
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Standard edge lift |
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Increased edge lift |
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Decreased edge lift |
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However
numerous other edge lift options are also available which
fine tunes the edge fit even further enabling the fitter to
provide
the optimal peripheral fit in nearly 100% of all Keratoconus
patients. Because this lens design follows more closely the
corneal shape, the Rose K2™ lens provides excellent
vision and comfort. The power of the trial set increases as
the back
optic zone radius steepens, allowing more accurate fitting
and power assessment as refraction with the trial lens is
usually
minimal. |
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| Spherical aberration control |
The
Rose K2™ lens design incorporates a sophisticated
parabolic section on the posterior surface to counteract spherical
aberration. This does not affect the original fitting characteristics
of the Rose K™ lens design. |
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Optics of a lens not using aberration control |
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Light rays do not focus at one point because of
spherical aberration. |
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Light rays focus at one point because spherical
aberration control is incorporated. |
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