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
Elements Hybrid Information Sheet
Elements Hybrid vs Soft Toric
No7 Recommends - Oté Sensation
All-in-one comfort solution for RGP contact lenses
Oté Sensation is an all-in-one solution that combines safety with comfort thanks to a double disinfecting system and the addition of a high-quality Hyaluronate, made using an environmentally-friendly, water-based process which does not contain any animal or toxic substances.
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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