Patients deserve optimal visual quality and functional visual acuity in all light conditions
Aspheric IOL with aberration-neutral technology:
- Offer improved contrast sensitivity compared with spherical IOLs3,4
- Provide better low light level visual acuity than spherical IOLs18
- Can offer more depth of field than aberration-negative IOLs by retention of the patient’s natural level of corneal spherical aberration6
- Are less susceptible to the effects of decentration than aberration-negative IOLs12
Spherical IOL:
Power increases from centre to edge.
Disadvantages
- Adds to corneal positive spherical aberration (SA)
- Degrades image quality and contrast sensitivity
Aberration-neutral aspheric IOL
Prolate anterior surface means uniform power from centre to edge. Aberration-neutral optic retains natural residual positive SA of the cornea.
Advantages
- High quality vision in all lighting conditions
- Good contrast sensitivity
- More depth of field than an aberration-negative aspheric IOL
- Optimal results for ALL patients; not just for the “average” cornea
Why is it important to retain depth of field?
Patients prefer a lens that retains depth of field6
Simulation of retained depth of field
Simulation of reduced depth of field
- Retention of some positive SA can provide up to 0.5 D of pseudo-accommodation, offering preferable visual outcomes
- - In a clinical trial of 80 patients where an aberration-neutral lens was implanted in one eye and an aberration-negative lens was implanted in the other eye:6
2 x as many
patients* preferred the aberration-neutral IOL
patients* preferred the aberration-neutral IOL
* Of those patients who expressed a preference
3 x fewer
reports of visual disturbances with the aberration-neutral IOL
reports of visual disturbances with the aberration-neutral IOL
References:
- Nanavaty MA et al. J Cataract Refract Surg. 2009; 35:663–671
- Yagci R et al. Eur J Ophthalmol. 2014 Jul 24; 24(5):688-92
- Johansson B et al. J Cataract Refract Surg. 2007; 33:1565–1572
- Altmann GE et al. J Cataract Refract Surg. 2005; 31(3): 574-585
- Pepose JS et al. Graefes Arch Clin Exp Ophthalmol. 2009 Jul;247(7):965-73
Both C-flex Aspheric and Superflex Aspheric IOLs are supplied with a Rayner injector
- Uniquely designed loading bay with an extension "lip" to facilitate loading.
- Soft plunger tip completely fills the nozzle and offers a soft protective interface with the IOL.
- Syringe-style design for single-handed technique for smooth IOL delivery with predictable and efficient insertion, ensuring consistent IOL implantations.
- Sterile Single-Use, ready to use.
| Model Name: | C-flex Aspheric |
| Model Number: | 970C |
| Power Range: |
+8.0 D to +29,5 D (0.5 D increments) |
| Optic Diameter: | 5.75 mm |
| Overall Length: | 12.00 mm |
| Model Name: | Superflex Aspheric |
| Model Number: | 920H |
| Power Range: |
-10.0 D to -1.0 D (0.5 D increments) |
| Optic Diameter: | 6.25 mm |
| Overall Length: | 12.50 mm |
| Delivery System | |
| Injector Type: | Sterile Single use loadable injector |
| Nozzle Size: | 2.00 mm |
| Bevel Angle: | 45° |
| Lens Delivery: | Single handed plunger |
| Aspheric Monofocal IOL | |
| Material: | Single piece Rayacryl® hydrophilic acrylic |
| Water Content: | 26% in equilibrium |
| UV Protection: | Benzophenone UV absorbing agent |
| UV light transmission: | UV 10% cut-off is 380 nm |
| Refractive Index: | 1.46 |
| Optic Shape: | Biconvex (positive powers), Biconcave (negative powers) |
| Asphericity: | Anterior aspheric surface with aberration-neutral technology |
| Optic Edge Design: | Amon-Apple 360° enhanced square edge |
| Haptic Angulation: | 0°, uniplaner |
| Haptic style: | Closed loop with anti-vaulting haptic (AVH) technology |
| Estimated constants for optical biometry SRK/T: | 118.6 |
| Estimated constants for Ultrasound A-constant: | 118.0 |
*Please note that the constants indicated for all Rayner lenses are estimates and are for guidance purposes only. Surgeons must always expect to personalise their own constants based on initial patient outcomes, with further personalisation as the number of eyes increases.
Not all products or offerings are approved or offered in every market and approved labelling and instructions may vary from one country to another. For country specific product information contact your local distributor or email iol_enquires@rayner.com.
Superflex is not approved by the FDA for use or distribution in the United States of America. For FDA status on C-flex please contact the Regulatory Affairs team
Rayner hold a selection of EC certificates for various products. Please contact the Regulatory Affairs team for the current version.
Scientific Papers and Supporting Materials
Peer Review Papers
- Yagci R, Uzun F, Acer S, Hepsen IF. Comparison of visual quality between aspheric and spherical IOLs. Eur J Ophthalmol. 2014 Sep-Oct;24(5):688-92
- Mathew RG. & Coombes AG. Reduction of Nd:YAGCapsulotomy Rates After Implantation of a Single-Piece Acrylic Hydrophilic Intraocular Lens With 360° Squared Optic Edge: 24-Month Results. Ophthalmic Surg Lasers Imaging. 2010 Nov-Dec;41(6):651-5
- Vyas AV, Narendran R, Bacon PJ, & Apple DJ. Three-hundred-sixty degree barrier effect of a square-edged and an enhanced-edge intraocular lens on centripetal lens epithelial cell migration Two-year results. J Cataract Refract Surg. 2007 Jan;33(1):81-7
- Werner L, Mamalis N, Pandey SK, Izak AM, Nilson CD, Davis BL, Weight C, Apple DJ. Posterior capsule opacification in rabbit eyes implanted with hydrophilic acrylic intraocular lenses with enhanced square edge. J Cataract Refract Surg. 2004 Nov;30(11):2403-9
- Tandogan T, Auffarth GU, Choi CY, Liebing S, Mayer C, Khoramnia R. In vitro comparative optical bench analysis of a spherical and aspheric optic design of the same IOL model. BMC Ophthalmol. 2017 Feb 8;17(1):9.
- Nanavaty MA. & Kubrak-Kisza M. Evaluation of preloaded intraocular lens injection systems: Ex vivo study. J Cataract Refract Surg. 2017 Apr;43(4):558-563.
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