| Rose
K Fitting Guide
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Step
One: Start the trial fitting 0.2 steeper than
the average of the K readings. Step Two: If this is a new rigid lens wearer, it may be advisable to use an anesthetic. this quickens the fitting process and allows a more accurate assessment of the fluorescein pattern because of reduced tearing. Step Three: Too much fluorescein will give false patterns - so be careful when instilling it. |
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Step
Four: Trial fit for the base curve - but don't
worry about the periphery at first. A light feathery
touch at the apex of the cone is best. The rest of the
pattern should look as close to alignment fir as
possible. Step Five: Next consider the peripheral fit. the trial lenses have a standard edge lift, but an increased or decreased edge lift on the same base curve can be ordered. If the central base curvelooks good but you have inadequate peripheral adge lift ( see inadeguate lift fig. ) then order increased edge lift. Conversely, order decreased lift if their is excessive peripheral lift ( see excessive lift figure ) |
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Step Six: The standard diameter is 8.70mm but any diametert is available. Smaller diameters of 8.10 - 8.30 work well on steep corneas and on highly astigmatic corneas. A larger diameter will tend to make the lens ride higher. Note: Cone lenses often have an inferior ride over the apex of the cone. Step Seven: Do a careful over - refraction using 1.00D steps initially and then refine. |
| Further
Detailed discussion
of the Rose K lens by Mr
Paul Rose - the designer
Technical Specifications: For More details contact: NOVA CONTACT LENSES Unit 11 Avebury Court, Mark Road Hemel Hempstead, Herts HP2 7TA ENGLAND Tel:- 44 (0)1442-253456 Fax:- 44 (0)1442-253301 Email:- nova-cl@dircon.co.uk Web:- novacontactlenses.com New Zealand: Corneal
Lens Corporation NZ Limited.
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