Nissel Custom Prosthetic – Cantor Barnard
Nissel Custom Prosthetic by Cantor Barnard is a specialized soft medical contact lens that is hand-painted to provide a customized appearance matching the fellow eye or the specific cosmetic and prosthetic requirements of the patient.
The company describes it as a High Water Content Soft Lens designed for:
- Prosthetic Use
- Cosmetic Use
It may also incorporate prescription correction for:
- Myopia
- Hyperopia
- Astigmatism
when required.
Delivery Time
The lenses are supplied within a maximum period of:
30 to 60 days
from the date the order is confirmed.
Hand-Painted Iris
The painted iris may be created from:
A high-quality digital photograph of the eye to be matched
or the color may be selected from the company’s:
Nissel Custom Colour Swatch
Cantor Barnard allows customization of multiple details, including:
- Iris color
- Iris pattern
- Visible iris diameter
- Pupil size
- Clear / open pupil
- Black / closed pupil
- Pupil position
- Iris position
- Scleral detail
- Engraving
Nissel Custom combines manufacturing repeatability with the artistic precision of hand painting.
The company’s guidance states that the aim is to reproduce the natural appearance of the eye as accurately as possible using the reference images supplied to the laboratory.
Lens Material
The currently published material is:
Contaflex 77% – Filcon 2
Property | Value |
|---|
Material | Contaflex |
Classification | Filcon 2 |
Water Content | 77% |
Published Dk | 46 |
Type | Soft Hydrogel |
Use | Daily Wear |
Painting | Hand Painted |
The high water content is one of the reasons Cantor Barnard describes this product as a:
High Water Content Soft Lens
Available Designs
Two official designs are available.
Nissel Custom Spherical
For spherical prescriptions such as:
Nissel Custom Toric
For prescriptions including:
for correction of:
Astigmatism
Nissel Custom is not a Multifocal contact lens.
A suitable product classification is:
Vision Type: Single Vision / Prosthetic Custom
Suitable Applications
Cantor Barnard states that Nissel Custom may assist with:
- Myopia
- Hyperopia
- Astigmatism
- Prosthetic Requirements to mask a visible cosmetic difference in the eye
- Customized cosmetic requirements where matching the fellow eye is needed
This product should not be presented simply as a standard cosmetic contact lens.
It is primarily a:
Custom Medical Contact Lens
that requires professional fitting and ordering.
Official Technical Specifications
Specification | Value |
|---|
Base Curve | 6.60–10.40 mm |
BC Steps | 0.10 mm |
Diameter | 11.00–20.00 mm |
Diameter Steps | 0.50 mm |
Sphere Power | -40.00D to +40.00D |
Power Steps | 0.25D |
Higher Powers | May be available on request |
Cylinder | -6.00 to -0.75 DC |
Cylinder Steps | 0.25D |
Axis | 1°–180° |
Visible Iris Diameter | 11.50–13.50 mm |
Iris Diameter Steps | 0.50 mm |
Material | Contaflex 77% |
Maximum Modality | Up to 12 Months |
Clear / Open Pupil Options
A:
Clear / Open Pupil
is available in the following diameters:
- 2.00 mm
- 2.50 mm
- 3.00 mm
- 3.50 mm
- 4.00 mm
- 4.50 mm
- 5.00 mm
- 6.00 mm
An open pupil allows a clear central optical zone according to the patient’s requirements.
Black / Closed Pupil Options
A:
Black / Closed Pupil
is available in the following diameters:
- 2.50 mm
- 3.00 mm
- 3.50 mm
- 4.00 mm
- 4.50 mm
- 5.00 mm
- 6.00 mm
- 7.00 mm
- 8.00 mm
- 9.00 mm
The eye care professional determines whether the patient requires:
An open pupil
or:
A black / closed pupil
according to the clinical and cosmetic requirements.
Additional Customization Options
Cantor Barnard officially lists options including:
- Black or Clear Pupil
- Opaque Iris
- Large Diameters
- Offset Pupil
- Offset Iris
- Scleral Detail
- Painting to match an eye photograph
- Color selection from a Swatch
- Engraving
These options allow each lens to be customized individually rather than being supplied as a standard pre-set color.
Matching the Color and Appearance of the Eye
Cantor Barnard provides two main methods.
Photograph Matching
The eye care professional submits a digital image of the natural or reference eye.
The Cantor Barnard artistic team then hand-paints the lens to reproduce the:
- Iris color
- Pattern
- Detail
- Overall appearance
as closely as possible.
Colour Swatch
A color can also be selected from the:
Nissel Custom Colour Swatch
when direct photographic matching is not used.
Photography Requirements for Hand Painting
The final appearance of the lens depends significantly on the quality of the reference photograph.
Cantor Barnard’s photography guidance specifies:
File Type
High-quality JPEG
Camera
A good digital camera or a smartphone with a high-quality camera may be used.
Expensive professional photographic equipment is not required.
Suggested Distance
Approximately:
6–12 inches from the eye
Include Both Eyes
The image should include:
Both eyes
so the artist can compare the two eyes and achieve a more accurate match.
Lighting
Use as much:
Natural light
as possible.
Avoid placing the main light source behind the patient.
Focus
The image should be:
Sharp and well focused
White Color Reference
The guide recommends placing:
A piece of white paper near the forehead
to provide a color reference for the artist during color adjustment.
Do Not Use a Slit Lamp Camera for Final Color Matching
The current product guidance requests a:
High Resolution JPEG
taken with a digital camera in good lighting.
It specifically states that a:
Slit Lamp Camera
should not be used for the final image submitted for hand painting.
If the image quality is inadequate, Cantor Barnard may reject it and request a new photograph.
If the Patient Has an Existing Lens
If the patient has an older prosthetic lens that they would like to reproduce, the old lens may be sent to Cantor Barnard to assist with manufacturing the new lens.
This can be useful for patients who are accustomed to a particular appearance and wish to reproduce it as closely as possible.
If the Color Does Not Match on the First Attempt
Cantor Barnard explains that, despite efforts to achieve a close match initially, the final appearance can look different when the lens is placed on the eye because of the interaction between:
- Natural eye color
- Lens color
- Lighting conditions
If adjustment is required, the company requests a new photograph showing:
The prosthetic lens on the eye and the natural fellow eye in the same image
so that the painting team can make further color adjustments.
Trial Fitting Lenses
There is no standard pre-made:
Nissel Custom Fitting Set
However, the company provides:
Up to two free trial lenses per eye
to help determine the correct fitting parameters and prescription before the final hand-painted lens is manufactured.
This is important because the final painted lens should not be ordered until the following have been confirmed:
- Base Curve
- Diameter
- Power
- Comfort
- Vision
Recommended Ordering Process
A suitable clinical and practical workflow is:
- Perform a full eye examination and refraction.
- Determine the required Base Curve.
- Determine Diameter.
- Determine optical power.
- Select Spherical or Toric design.
- Order an unpainted fitting lens.
- Assess lens fit.
- Assess comfort.
- Assess vision.
- Confirm the final parameters.
- Photograph the eye according to Cantor Barnard guidance.
- Select the Visible Iris Diameter.
- Select Open or Closed Pupil.
- Select pupil size.
- Specify any Offset requirements.
- Specify Scleral Detail if required.
- Send the photograph and final order to the laboratory.
- Manufacture a new custom hand-painted lens.
The company states that once the fit and vision have been confirmed using the trial lens, the trial lens is discarded and a new lens is manufactured for hand painting.
Replacement Schedule
The published maximum modality is:
12 Months Maximum
However, Cantor Barnard states that the final replacement interval should be determined by the:
Eye Care Professional
The lens may require replacement before 12 months depending on:
- Lens condition
- Lens integrity
- Deposits
- Ocular health
- Changes in prescription
- Professional assessment
Wearing Schedule
Nissel Custom is a:
Reusable Soft Contact Lens
and should be worn according to the schedule prescribed by the eye care professional.
The lenses should not be worn while sleeping unless the eye care professional specifically authorizes this.
Lens Care Instructions
For reusable soft lenses, Cantor Barnard recommends:
Before Handling
- Wash hands thoroughly
- Rinse hands
- Dry hands completely before touching the lenses
After Removal
- Rub the lens using the appropriate contact lens solution
- Rinse with suitable solution
- Store in fresh disinfecting solution
- Do not reuse old solution
- Do not top up old solution with fresh solution
Lens Case Care
- Clean the lens case according to professional instructions
- Do not use tap water
- Replace the lens case at least once per month
Avoid
- Water on the lens
- Saliva on the lens
- Swimming while wearing the lenses
- Showering while wearing the lenses
- Hot tubs while wearing the lenses
- Sharing the lenses with another person
When Should Lens Wear Be Stopped?
Remove the lens and contact an eye care professional immediately if symptoms occur such as:
- Eye pain
- Persistent discomfort
- Redness
- Swelling
- Blurred vision
- Noticeable changes in comfort
- Noticeable changes in vision
- A white or yellow spot on the cornea
Cantor Barnard also warns about complications that may result from inappropriate contact lens use, including:
- Microbial Keratitis
- Acanthamoeba Keratitis
- Corneal Ulcer
- Corneal Abrasion
Special Policy for Hand-Painted Lenses
An important consideration for the product return and replacement policy is that Cantor Barnard’s published terms state that:
Nissel Custom Hand-Painted Lenses
are not eligible for the standard replacement or credit policy once the painted lens has been manufactured.
For this reason, all of the following should be approved before final manufacturing begins:
- Lens parameters
- Color
- Reference photograph
- Iris design
- Pupil specification
A suitable store statement is:
This lens is individually manufactured and hand-painted to order. Once the final specifications have been approved and manufacturing has begun, the product is not eligible for return or exchange except in the case of a confirmed manufacturing defect, subject to the supplier’s policy.
Country of Manufacture
United Kingdom
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