Reflex Kera

Reflex Kera is fitted from a 5 lens fitting set. The fitting set has base curves of:

7.00, 7.30, 7.60, 7.90 and 8.20mm

The initial diagnostic lens base curve should be selected as below rather than using keratometry readings –

• For prolate /keratoconus corneas:  Select 7.60
• For oblate /post-surgical corneas:  Select 7.90 BC

Wait 10 minutes – This allows the lens to settle and equilibrate.

If diagnostic lens –

• Exhibits excessive movement ( >1mm on blink) or fluting of the edge: Select next steeper base curve
• Exhibits little or no movement or trapped bubbles after 10 minutes of settling: Select next flatter base curve

• Lens must have settled for a total of 30 minutes before over-refracting: The tear lens needs to form fully before an accurate power can be calculated
• The aim of over-refraction is to obtain good functional vision

Always begin with a spherical over-refraction:

• If acceptable vision is obtained, vertex correct the over-refraction as necessary and order lens
• Only perform a sphero cylindrical over-refraction if good functional vision cannot be obtained

Patients are more likely to be happy with consistent 6/9 or 6/12 vision than with a highly variable and intermittent 6/6:

• If a sphero cylindrical over-refraction produces a consistent improvement of a line or ideally more of vision a toric lens should be ordered
• The two fenestrations in the Reflex Kera toric will be placed at the 3 and 9 o’clock positions. There is also a dot at the 6 o’clock position