CORNEAL GP LENSES
Corneal GP Lenses
Corneal lenses that make a difference. For post surgery, presbyopia, single vision and keratoconus.
Valley Rev Geo | Post Surgery
Design
- Large-diameter corneal lens for increased comfort and centration.
- Solves most Post-Lasik and Post-RK issues.
- Manufactured in Optimum Extra and Extreme.
Fitting Guide
Lens Type | Reverse Geometry
Diagnostic Lens Color | Blue
- The selection of the base curve is determined by 'mean K'.
- The lens should demonstrate 1 - 2 mm of movement and an alignment pattern across the horizontal meridian.
- Analyze the peripheral curve for an alignment pattern with an adequate edge lift, if adjustments are needed, use the step system to customize the fit.
- Over-refract the patient to arrive at a spherical power change for best visual acuity, if possible.
- If a cylinder over-refraction is necessary, report your findings to a Valley Contax lens consultant to finalize the lens parameters.
Lasik Near | Post Surgery
Design
- The Lasik Near is the first and only post refractive surgery multifocal on the market today.
- Manufactured in any material, however, recommended in higher index materials.
- Reverse Geometry back surface to fit ablated corneas, with high eccentric front surface to accommodate great intermediate and near vision.
Candidates
- Any patient who has had LASIK, RK, Corneal Transplant or corneal trauma.
- A patient that has presbyopic needs.
- Combine the two modalities, and there is the LasikNear.
Fitting Guide
Lens Type | Reverse Geometry Multifocal
Diagnostic Lens Color | Blue
- The selection of the base curve is determined by 'mean K'.
- The lens should demonstrate 1 - 2 mm of movement and an alignment pattern across the horizontal meridian.
- Analyze the peripheral curve for an alignment pattern with an adequate edge lift, if adjustments are needed, use the step system to customize the fit.
- Over-refract the patient to arrive at a spherical power change for best visual acuity, if possible.
- Evaluate the fit with the near card to determine whether the standard +2.25 add is sufficient.
- Call your Valley Contax lens consultant to customize the fit for your patient.
VKone | Keratoconus
Design
- State of the art, bi-aspheric, next generation keratoconic lens.
- Manufactured in Contamac Optimum materials.
- Even larger optical zones, seamless eccentricity provides great centration and vision.
Candidates
- Patients who have been diagnosed with Keratoconus or pellucid marginal degeneration.
Lens Parameters
- This is a custom made product that is available in virtually any curve, any sagital depth.
- Available in a standard 14 lens fitting set, with Base Curves ranges 70d-44d, in three main diameters: 9.0, 9.8, 10.6.
Fitting Guide
Lens Type | Keratoconus
Diagnostic Lens Color | Blue
- Determine the base curve by referring to the steepest K reading or steepest sim K value.
- If reliable K readings or corneal topography data is not available, select the 50.00D (6.75mm) base curve lens from the diagnostic set.
- A lens should exhibit a slight clearance over the central corneal ectasia.
- Analyze the peripheral curve for an alignment pattern with an adequate edge lift, if adjustments are needed, use the step system to modify the edge lift of the lens.
- Call your Valley Contax lens consultant to customize the fit for your patient.
KVault | Keratoconus
Design
The KVault is a reverse geometry lens design that is built to vault all ectatic corneas with a dynamic reverse curve in 7 step options.
Fitting Guide
Lens Type | Keratoconus
Diagnostic Lens Color | Blue
- Begin by selecting lens from 7-lens diagnostic set as follows:
Flat K Vault Color Flatter than 45.00D 1 Blue #2 45.00 - 50.00D 2 Green #2 51.00 - 55.00D 3 Blue 56.00 - 60.00D 4 Green 61.00 - 65.00D 5 Gray 66.00 - 70.00D 6 Brown Steeper than 70.00D 7 Gray #2 - Continue increasing in vault value until base curve vaults the cornea and assess the peripheral curves for alignment.
- Over-refract for best vision.
- Call your Valley Contax lens consultant to customize the fit for your patient.
CAD | Single Vision
Design
CAD lenses are a corneal GP lens that are an easy fit, cylinder control lens. CAD lenses are laser engraved with the BC and Power for diagnostic organization.
Fitting Guide
Lens Type | Single Vision
Diagnostic Lens Color | Blue
- Select the diagnostic lens closest to the flat K. The base curve should be adjusted steeper or flatter until an alignment fluorescein pattern is noted centrally across the flat corneal.
- Ideal vertical movement of 2-3mm is imperative to achieve a healthy, comfortable fit.
- The ideal lift of the CAD design should exhibit peripheral clearance when the lens is resting in its primary position (slight superior). If the .11 (average) edge lift of the diagnostic lens exhibits peripheral impingement, a .14 edge lift should be ordered. If the .11 edge lift diagnostic lens exhibits excessive clearance, a .10 edge lift should be ordered.
- The lens power can easily be calculated empirically by refraction over a diagnostic lens.
CELL System | Single Vision
Design
CELL System lenses are a large diameter, single vision lens that is a cylinder control, easy fit lens.
Fitting Guide
Lens Type | Single Vision
Diagnostic Lens Color | Green
- If using a fitting set select the diagnostic lens closest to the flat K. The base curve should be adjusted steeper or flatter until an alignment fluorescein pattern is noted centrally across the flat cornea.
- If designing from k reading data, order a lens that is 1/2 diopter flatter than median K. Use the SAM and FAP method to calculate contact lens power after vertexing spherical component of spectacle refraction.
- Ideal vertical movement of 2-3mm is imperative to achieve a healthy, comfortable fit.
- The ideal lift of the CELL Design should exhibit peripheral clearance when the lens is resting in its primary position (slight superior). If the .12 (average) edge lift of the diagnostic lens exhibits peripheral impingement, a .14 edge lift should be ordered. If the .12 edge lift diagnostic lens exhibits excessive clearance, a .10 edge lift should be ordered.
- The lens power can easily be calculated empirically by refraction over a diagnostic lens.
Golden Eye AFM | Multifocal
Design
The GoldenEye AFM (Aspheric Front Multifocal) is an incredible advancement in GP multifocal fitting.
- Completely spherical back surface to fit virtually any patient "on K".
- Highly eccentric front surface to achieve a seamless transition from distance, to intermediate, to close up.
- Large standard diameter for initial comfort, centration, and near vision performance.
- Powerful intermediate effect for the demands of personal communication devices.
Candidates
- Presbyopic patients who want to improve their quality of vision, and life.
- Any patient who is struggling with Soft Multifocal Torics, and has struggled with the comfort of conventional GP's in the past.
Lens Parameters
- This is a custom made product that is manufactured in any range of parameters, and up to a +4.00 add power.
- Material of choice is Contamac Optimum, or any good wetting material with a higher index of refraction.
- Available in a dynamic 14 lens fitting set, that is designed with your success in mind.
Fitting Guide
Lens Type | Bifocal
Diagnostic Lens Color | Blue
- Achieving translation and acute distance vision is the first step.
- Evaluate a good fitting lens which is identical to a single vision lens.
- With a near card, determine whether the standard +2.25 add is sufficient.
- Call your Valley Contax lens consultant to customize the fit for your patient.
Golden Eye | Multifocal
Design
- Simultaneous aspheric multifocal
- Offers add power up to +3.00D.
- Back aspheric accompanied by a front aspheric for additional add.
- Manufactured in any material.
Candidates
- Patients who have presbyopia.
Lens Parameters
- Any base Curve radius
Diameters
- 9.2mm to 9.8mm
- 2.00mm Optic Zone
Platinum Eye | Multifocal
Design
- Simultaneous aspheric multifocal
- Offers add power up to +3.00D.
- Back aspheric accompanied by a front aspheric for additional add.
- Manufactured in any material.
Candidates
- Patients who have presbyopia.
Lens Parameters
- Any base Curve radius
Diameters
- 9.2mm to 9.8mm
- 2.00mm Optic Zone
Buckley Bifocal | Translating
Design
The Buckley Bifocal is a great solution that has proved worthy over a number of years.
- Spherical back-surface executive bifocal.
- Prism ballasted for consistency and stability.
- Offers acute distance and near when aspherics don’t provide proper clarity.
- Add power up to +3.50.
Fitting Guide
Lens Type | Bifocal
Diagnostic Lens Color | Blue
- Determine the patients 'flat k'.
- Start with a lens that is at flat k, or slightly flatter than the flat k.
- Evaluate fluorescein to achieve even to slightly flat pattern with good edgelift.
- Proper fitting Buckley will settle inferiorly, come up slightly with blink, and then settle back inferior.
- Analyze position of segment height to clear the inferior pupil margin. An opthalmoscope is helpful in this evaluation.
- Raise or lower segment height depending on position of segment on distance gaze, in normal room lighting.
- Perform binocular over-refractions for both distance and near.