Hydrolens / Hydrofit Sphere Clear – Non Standard – Cantor Barnard

Hydrolens / Hydrofit Sphere Clear – Non Standard by Cantor Barnard are medical soft Single Vision contact lenses designed to correct Myopia or Hyperopia using spherical power and manufactured using precise Lathe-Cut technology.

Delivery Time

The lenses are supplied within a maximum period of:

30 to 60 days

from the date the order is confirmed.

Lens Design

The lenses use:

Spherical Blended Bi-Curve Front and Back Surfaces

designed to provide a smooth transition between the optical and peripheral zones and to support stable fitting and comfort when the appropriate Base Curve and Diameter are selected.

Hydrolens, in particular, is available in a broad range of:

• Materials
• Base Curves
• Diameters
• Powers
• Custom parameters

Cantor Barnard optimizes individual prescriptions with consideration for:

• Lens thickness
• Ease of handling
• Oxygen transmission
• Prescription requirements

Clear / Sphere / Non Standard

Clear

The Clear version is not intended to alter the natural appearance or color of the eye.

Sphere

Sphere indicates a spherical Single Vision prescription without:

• Cylinder
• Axis

It is intended primarily for:

• Myopia
• Hyperopia

Non Standard

Cantor Barnard does not publish Non Standard as a separate clinical lens category.

For a product listing, the most appropriate interpretation is:

Custom / Special Parameters

with the final specifications determined according to:

• Prescription
• Eye measurements
• Clinical assessment
• Laboratory manufacturing capabilities

Recommended wording:

Non-Standard / Custom Parameters: Determined according to the prescription, ocular measurements, and laboratory manufacturing capabilities.

Key Features

• Soft Contact Lens
• Single Vision
• Spherical power
• Clear lens option
• Custom-made to prescription
• Special / non-standard parameters may be available subject to laboratory approval
• Precision Lathe-Cut manufacturing
• Spherical blended front surface
• Spherical blended back surface
• Wide power range
• Multiple materials with different water contents and oxygen permeabilities
• Suitable for Myopia
• Suitable for Hyperopia
• Daily Wear
• Manufactured in the United Kingdom
• Prescribed and fitted by an eye care professional

Hydrolens Specifications

Hydrolens is the more flexible option when referring to:

Non Standard / Custom Parameters

because of its broad published fitting range.

Hydrolens Materials

The current Cantor Barnard booklet, Issue 2 – January 2026, lists the following materials:

Important Manufacturing Note

Not every combination of:

Base Curve × Diameter × Material

can necessarily be manufactured.

Cantor Barnard states that some parameter combinations are restricted depending on the selected material.

For this reason, Non Standard parameters should be presented as a custom request requiring laboratory review rather than as an unrestricted list of customer-selectable options.

Hydrolens Design

The official design includes:

Spherical Blended Front Surface

and:

Spherical Blended Back Surface

together with a:

Graduated Aspheric Lenticular Zone

This graduated aspheric lenticular zone is used to help:

• Reduce lens thickness across different powers
• Improve handling
• Support oxygen transmission

Manufacturing is performed using:

Computer-Controlled Lathes

to provide high reproducibility of customized prescriptions.

Hydrofit Specifications

Hydrofit is also a Single Vision Sphere soft lens, but its standard fitting parameters are more defined than Hydrolens.

Power range:

-30.00D to +30.00D

Power steps:

0.25D

Higher powers:

May be available on request

If an order is specifically labeled:

Hydrofit NON STANDARD

it is important to identify exactly which parameter is non-standard, such as:

• Power
• Diameter
• Base Curve
• Material

because the general published Hydrofit information does not provide a separate expanded non-standard fitting range.

Hydrofit Materials

Cantor Barnard currently lists:

Hydrofit Replacement Schedule

Cantor Barnard describes Hydrofit as a Lathe-Cut lens:

Designed to last up to 6 months

with the actual replacement frequency determined by the eye care professional.

Recommended wording:

Replacement: Up to 6 Months / According to eye care professional recommendation

Hydrolens or Hydrofit for Non-Standard Parameters?

If the requirement involves genuinely unusual or highly customized fitting parameters, Hydrolens is officially the more flexible range because it extends to:

Base Curve: 6.60–10.40 mm

and:

Diameter: 11.00–20.00 mm

Hydrofit, by comparison, uses three more specific standard Diameter and Base Curve groups.

For this reason, Hydrolens and Hydrofit should not necessarily be combined into one final product listing unless:

Hydrolens / Hydrofit Sphere Clear – Non Standard

is the actual naming convention used by the supplier.

Suitable Applications

The Sphere version is primarily suitable for:

• Myopia
• Hyperopia
• Higher spherical prescriptions
• Cases requiring a customized Diameter
• Cases requiring a customized Base Curve
• Users who are not adequately served by standard stock parameters
• Cases requiring a custom soft lens based on individual ocular measurements

Not Intended for These Corrections

Astigmatism

If Cylinder and Axis correction is required, the more appropriate Cantor Barnard design is:

Hydrocyl

Presbyopia / Multifocal Correction

This Sphere version is not intended for Multifocal correction.

Cantor Barnard offers separate Multifocal products such as:

PV Series

Vision Type

Recommended product classification:

Vision Type: Single Vision

The standard spherical Hydrolens / Hydrofit design is not Multifocal.

EV Aberration Control

An optional:

Cantor Barnard EV Aberration Control

may be added to Hydrolens.

The company describes it as an:

Aberration-Controlled Single Vision Enhancement

intended to improve visual clarity and stability, particularly under difficult lighting or contrast conditions.

However:

• It is not Multifocal
• It should not automatically be included with Sphere / Clear / Non Standard
• It should only be listed if specifically included in the prescription or order

Fitting Procedure

The official Hydro Range fitting guidance recommends beginning with:

• Full Refraction
• Eye Examination
• Keratometry
• HVID measurement
• Diameter selection
• Base Curve selection
• BVD power adjustment when required

Diameter Selection

Cantor Barnard recommends an initial starting point of:

Diameter = HVID + 2.00 to 3.00 mm

The final Diameter is then adjusted according to:

• Corneal coverage
• Centration
• Lens movement

Settling Time

After lens insertion:

Allow approximately 30 minutes

before the final fitting assessment.

The professional should then evaluate:

• Comfort
• Centration
• Coverage
• Edge behavior
• Movement with Blink
• Push-Up Test
• Over-Refraction

Good Fit

A good fit generally includes:

• Good comfort
• Good centration
• Complete limbal coverage
• Stable edge
• Appropriate movement with blinking
• Easy movement during the Push-Up Test
• Good return to the central position

Steep Fit

A steep fit may show:

• Little or no movement
• Difficulty performing the Push-Up Test
• Slow return to the central position
• Conjunctival indentation
• Blanching

The fitting may require:

• A flatter Base Curve
• Diameter adjustment

Flat Fit

A flat fit may show:

• Poor comfort
• Poor centration
• Insufficient coverage
• Excessive movement
• Edge stand-off
• Fluting

The fitting may require:

• A steeper Base Curve
• Diameter adjustment

Lens Care Instructions

Cantor Barnard currently publishes SOFT Instructions for Use – Issue 15 for its soft contact lenses.

Recommended care includes:

• Wash and dry hands thoroughly before handling the lens
• Use a care system suitable for soft contact lenses
• Clean and disinfect according to the care solution instructions and professional recommendation
• Always use fresh solution
• Do not reuse old solution
• Avoid tap water
• Do not use saliva
• Keep the contact lens case clean
• Replace the lens case regularly
• Do not wear a torn or damaged lens
• Follow the wearing hours prescribed by the eye care professional
• Remove the lens and seek professional advice if pain, redness, irritation, or changes in vision occur

Wearing Schedule

Classification:

Daily Wear

The lens should not be presented as:

Extended Wear

or as suitable for sleeping unless specifically instructed by the manufacturer and the eye care professional.

Published maximum replacement periods differ between the two ranges:

• Hydrolens: Up to 12 months maximum
• Hydrofit: Designed for up to approximately 6 months

The actual replacement interval should always be determined by the eye care professional.

Important Warnings

Hydrolens / Hydrofit Sphere Clear – Non Standard is a custom medical Single Vision soft contact lens manufactured according to the prescription and measurements of the eye. Any non-standard parameters must be determined and reviewed by an eye care professional before manufacturing.

Available combinations of:

• Material
• Base Curve
• Diameter
• Power

may be subject to laboratory manufacturing limitations.

The lens is intended for:

Daily Wear

and the appropriate wearing and replacement schedule should be determined individually by the eye care professional.