Elements Hybrid offers an excellent and flexible fitting strategy with a broad range of radii and lens power for all patients.
Who is Elements Hybrid for?
- Wearers of RGP lenses having problems relating to comfort, centration or stability
- Keratoconus and other corneal irregularities, including highly complex irregular corneas
- All astigmatisms that can potentially be fitted with RGPs
- All high ametropias
- Wearers of Piggyback lenses
- Unilateral or occasional wear
- Fit
- Evaluate
- Prescribe
1: Fit
Normal Corneas
Fitting Rule
- BC = Kflat
- Power = Spectacle refraction (vertex corrected)
Irregular Corneas
Fitting Rule
- Fit the patient with an RGP from your standard RGP fitting set (TD < 9.5mm)
- BC of RGP = BC of Elements Hybrid Lens
- Power = P trial lens + over-refraction
2: Evaluate
- Assess visual acuity and over-refraction
- Perform a slit lamp examination and evaluate the lens as a soft lens
- Remove the lens after several hours of wear and check corneal integrity
The lens has to be well centred and should move as a soft lens
If no local staining is apparent the patient can continue to wear lenses
3: Prescribe
Normal Corneas
Elements Hybrid with 10mm RGP zone
Example:
Keratometry: 7.45 @ 160/7.26 @ 070
Spectacle refraction: -8.25/-1.50 x 160
Prescribe:
Elements Hybrid, 10mm RGP zone 7.45/14.90/-7.50
Irregular Corneas
Elements Hybrid with 8.5mm RGP zone
Example:
Keratometry: 6.80 @ 056/6.10 @ 146
RGP lens fitted: 6.60/8.80/-6.00
Over-refraction: -2.25 6/6
Prescribe :
Elements Hybrid, 8.5mm RGP zone 6.60/14.90/-8.25
Trouble Shooting
If centration and/or mobility are unsatisfactory, change the skirt:
– Skirt too steep? Flatten by J +0.5
– Skirt too flat? Steepen by J -0.5
If staining, verify the fluorescein pattern at removal and change BC:
Staining in the centre? The lens is too flat.
Steepen BC by -0.10 and add -0.50D
Staining at junction area? The lens is too steep.
Flatten BC by +0.10 and add +0.50D
Too Flat
Optimal Fit
Staining
An Example
Keratometry: 7.45 @ 160/7.26 @ 070
Spectacle refraction: -8.25/-1.50 x 160
Lens Prescribed
Elements Hybrid with 10mm RGP: 7.45/-7.50/J 0
Observations
Decentred lens | No corneal staining
Changes
Skirt steepened by -0.5 | No change of BC
Prescribe
Elements Hybrid 10mm RGP: 7.45/-7.50/J -0.50
When to Opt for a Toric
Back Toric Lens
When? Only if the cornea is regular and if the corneal astigmatism is >4.0D (> 0.80mm).
Why? The objective of the back toric is to stabilise the lens.
Front Toric Lens
When? If the corneal shape doesn’t require a back-surface toric lens and if the astigmatism over-refraction is >0.75D.
Why? Front toric lenses compensate an over-refraction for wearers with astigmatism.
Bi-toric Lens
When? If the corneal shape requires a back-toric lens and if toric over-refraction is >0.75D
Lens Selection Algorithm
- Great comfort thanks to the Silicone Hydrogel soft skirt
- The visual acuity of a rigid lens
- Excellent centration and a simple fitting protocol even on difficult corneas
- Spherical aberration control provided by a high definition aspheric design
- A broad range of diameters, radius and lens power for all wearers
- Total respect of ocular health:
-
A high level of oxygen permeability (Dk 100)
A UV filter that filters 99% of UV-A and 97% of UV-B
No micro-bubbles nor 3/9 o’clock staining
No corneal erosion
A flexible wear schedule enabling both daily and occasional wear
Parameters
| Materials |
|
| Water Content | Silicone Hydrogel 50% |
| Dk | RGP central zone: 100 Soft skirt: 50 |
| Centre thickness | 0.20mm |
| Design | Spherical, Back/Front/Bi-Toric and Multifocal |
| RGP Diameter | 8.50mm and 10.00mm (for regular corneas) |
| Diameter | 14.90 mm (15.50 mm possible) |
| Base curve | From 5.50 to 10.00 mm in 0.05 mm steps Back toricity from 0.30 to 1.80 mm in 0.05 mm steps |
| Soft Skirt | J 0.0 (standard skirt) – From -1.0 to +1.0 in 0.5 steps |
| Power | From -40.00 to +40.00 D in 0.25 D steps Cyl. from -0.50 to -6.00 D in 0.25 D steps – all axis |
| Wearing Schedule | Daily wear |
| Replacement | 6-monthly |
| Lens care | Peroxide solution or multi-purpose solution for soft contact lenses (No7 recommends Oté Sensation) If a separate daily cleaner is needed No7 recommends Oté Clean |
Lens Insertion
Lens Removal
Lens Removal with Plunger
Lens Removal with Finger Pinch
Downloads
Elements Hybrid Fitting Guide
Fitting Elements Hybrid is easy when you follow 3 easy steps…
Elements Hybrid Information Sheet
An introduction to the features and benefits of Elements Hybrid.
Elements Hybrid vs Soft Toric
With Elements Hybrid you’ll find the perfect design for your unsuccessful soft toric patients.
Kevin Taylor
Technical Director
We have a dedicated technical support team, headed by Kevin, with decades of experience ready to help and advise you on any fitting issues. If you need support, please call:
01424 850620
Frequently Asked Questions
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