New Quarter Powers from Rayner

Rayner proudly introduces new, unique Quarter Dioptre Powers in the Centerflex® lens in the following ten quarter-powers:
1. 18.25D 
2. 18.75D 
3. 19.25D
4. 19.75D 
5. 20.25D
6. 20.75D 
7. 21.25D 
8. 21.75D 
9. 22.25D 
10. 22.75D

This innovative service is introduced to meet the exacting needs of modern ophthalmic surgeons. As biometrical techniques advance, surgeons are able to calculate very exactly the desired refractive outcome for their cataract patients.

The Centerflex® design has proven stability due entirely to the performance of the uniquely designed haptics incorporating AVH technology, this gives Centerflex® the “edge” in terms of dioptric accuracy. This has been clearly demonstrated by UK surgeons Piers Percival, Peter Bacon and Ashok Vyas (Scarborough, Yorkshire). At the Amsterdam ESCRS, the Scarborough Group reported excellent visual outcomes with excellent dioptric accuracy when using Centerflex®.

Internationally renowned Ophthalmologist, Piers Percival praises the dioptric accuracy of Centerflex®. Several factors have an impact on the postoperative refractive outcome: the biometrist’s skill, the formulae used in biometry, the manufacturer’s accuracy, the surgical method and (most important of all) the implant’s stability. The Centerflex® design is uniplanar.

The AVH technology prevents the lens buckling or antero-posterior movements post-operatively. The 12mm haptic diameter tends to stretch the posterior capsule to maintain clarity. At Scarborough, 435 consecutive refractions were performed on first eye Centerflex® implants and these were compared to “target refractions” computed at the time of surgery using the Hoffer Q formula for axial lengths less than 22.0mm, the SRK(T) formula for axial lengths greater than 24.5mm and a mean of the two formulae for lengths in between. Our results showed that a total of 421 (97%) refractions were within one dioptre of target and 348 (80%) were within half a dioptre of target. 344 (79%) of eyes were seeing 6/12 or better unaided at one month and 387 (89%) 6/9 with correction.

(condensed from the article: Percival, S.P.B., New Developments in Intraocular Lens Design. CE Optometry 2001 Vol 4 No 2:76-8)