The CANTOR & SILVER SX Tinted (hioxifilcon A) Spherical Soft Contact Lenses for daily wear are indicated for the correction of visual acuity in aphakic and not-aphakic persons with non-diseased eyes with myopia or hyperopia. The leases may be worn by persons who exhibit refractive astigmatism of 1.50 diopters or less where the astigmatism does not interfere with visual acuity. The lenses are disinfected using a hydrogen peroxide lens care system only, and are available in a frequent replacement program.

The CANTOR & SILVER 5X Tinted (hioxifilcon A) Toric Soft Contact Lenses for daily wear are indicated for the correction of visual acuity in aphakic persons with non-disessed eyes with myopia or hyperopia and/or possesses refractive astigmatism up to 10.00 diopters. The lenses are disinfected using a hydrogen peroxide lens care system only, and are available in a frequent replacement program.

Device Description

The CANTOR & SILVER 5X Tinted (hioxifilcon A) Soft (Spherical & Toric) Daily Wear Contact lens are fabricated from hioxifilcon A, which in the dry (unhydrated) state may be machined and polished. The hydrophilic nature of this material allows the lens to become soft and pliable when immersed in an aqueous solution. The color enhanced soft contact lenses are tinted with "listed" color additives. The color additives are used in amounts not to exceed the minimum reasonably required to accomplish the intended coloring effect. As part of the manufacturing process, the lenses containing the color additives are thoroughly washed to remove unbound reactive color additives. The manufacturing process alters and/or changes the specifications to the clear version of a contact lens by affixing a listed color reactive additive on that portion of the anterior (front) surface of the lens that corresponds to the iris. The finted contact lenses are available in a light, medium or dark shade of the following enhance colors; Blue, Green, Aqua, Yellow, Lavender, Brown, Ultra Violet, and Amber.

The color additive (timing) effect is formed by reacting one or more of the "listed" additives with HEMA based (poly hydroxyethy) methacrylate) soft contact lens. The color additives used are not removed by lens handling and cleaning/disinfecting procedures as recommended. Except for affecting the amount of light transmitted through the lens, the coloring process does not alter the original characteristics of the pre-tinted lens.

In the bydrated state, the lens conforms to the curvature of the eye covering the comea and extending slightly beyond the limbus forming a transparent optical surface. The (hioxifilcon A) soft hydrophilic contact lens a spherical back surface. The hydrophilic properties of the lens require that it be maintained in a fully hydrated state in a solution compatible with the eye. If the lens dries out, it will become hard and appear somewhat warped; however, it will return to its proper configuration when completely rehydrated in the proper storage solution.

AI/ML Overview

This document is a 510(k) premarket notification for a contact lens, which means it's focused on demonstrating substantial equivalence to existing devices rather than proving performance against specific acceptance criteria through a clinical study with detailed statistical outcomes.

Therefore, the information regarding acceptance criteria, specific study designs, sample sizes for training/test sets, expert adjudication methods, MRMC studies, or standalone algorithm performance, as typically sought for AI/ML device evaluations, is not present in this type of submission.

Instead, the submission focuses on comparing the new device's characteristics to a predicate device (Durasoft 2 Colors) to demonstrate that it does not raise new questions of safety or effectiveness.

Here's a breakdown of what is available, and what is not:

1. A table of acceptance criteria and the reported device performance:

Acceptance Criteria (Implicit): The implicit acceptance criterion is "substantial equivalence" to the predicate device, meaning the new device's characteristics (materials, production method, lens function, color additives, and use restrictions) are similar enough to an already approved device that it's considered equally safe and effective.
Reported Device Performance: Instead of performance metrics, the document provides the physical properties and characteristics of the CANTOR & SILVER 5X Tinted contact lens, and then compares them to the predicate device to show similarity.

Here's the table from the document, re-formatted to highlight the comparison for "performance" in this context:

Characteristic	CANTOR & SILVER 5X TINTED (Reported)	DURASOFT 2 COLORS (Predicate)	Substantial Equivalence?
PRODUCTION METHOD	Lathe-Cut	Lathe-Cut	Yes
LENS FUNCTION	Refractive medium that focuses light rays from near and distant objects on the retina, while compensating for refractive error, including (astigmatism)	Refractive medium that focuses light rays from near and distant objects on the retina, while compensating for refractive error, including (astigmatism)	Yes
FDA "listed" colored additives	The reactive colored additives consist of reactive black 5, reactive blue 4, reactive blue 19, reactive 21, reactive blue 163, reactive yellow 15, reactive yellow 86, reactive orange 78, reactive red 11 and reactive red 180	The colored pigments consist of iron oxides, chromium oxide greens, titanium dioxide, [phthalo-cyaninato (2-)] copper, carbazole violet and phthalocyanine green.	Note: Different additives, but the document claims equivalence in usage and restrictions.
Uses and restrictions	The color additives listed above may be used to color contact lenses in amounts not to exceed the minimum reasonably required to accomplish the intended coloring effect.	The color additives listed above may be used to color contact lenses in amounts not to exceed the minimum reasonably required to accomplish the intended coloring effect.	Yes
Color Additive Characteristics	The color additives used are not removed by lens handling and cleansing/disinfecting procedures. The optical and performance characteristics are not altered by the lens coloring process.	The color additives used are not removed by lens handling and cleansing/disinfecting procedures. The optical and performance characteristics are not altered by the lens coloring process.	Yes
Colors Offered	Blue, Green, Aqua, Yellow, Lavender, Brown, Ultra Violet and Amber	Sky blue, Jade green, Aquamarine and Violet blue	Note: Different range of colors, but this is a styling difference, not a functional one impacting safety/effectiveness.
Other Physical Properties	Refractive Index: 1.515 (dry) 1.404 (hydrated), Light Transmission: >70%, Water Content: 58% ± 2%, Specific Gravity: 1.308 (dry) 1.136 (hydrated), Oxygen Permeability: $20 X 10^{-11}$ (cm²/sec) (ml O₂/ml x mm Hg @ 35°C)	(Not explicitly listed for predicate, but assumed to be within acceptable ranges for soft contact lenses for equivalence claim)	Yes

2. Sample size used for the test set and the data provenance (e.g. country of origin of the data, retrospective or prospective):

Not Applicable: This submission does not describe a clinical performance study with a test set in the way a modern AI/ML device would. The "study" here is essentially a technical comparison and declaration of equivalence.

3. Number of experts used to establish the ground truth for the test set and the qualifications of those experts (e.g. radiologist with 10 years of experience):

Not Applicable: There is no "ground truth" establishment in the context of expert consensus for a test set described. The ground truth for regulatory approval is the established safety and effectiveness of the predicate device and the new device's proven similarity to it through material science, manufacturing, and toxicology data.

4. Adjudication method (e.g. 2+1, 3+1, none) for the test set:

Not Applicable: No test set adjudication method is described.

5. If a multi reader multi case (MRMC) comparative effectiveness study was done, If so, what was the effect size of how much human readers improve with AI vs without AI assistance:

No: This is a contact lens, not an AI-powered diagnostic device. No MRMC study was conducted or is relevant.

6. If a standalone (i.e. algorithm only without human-in-the-loop performance) was done:

Not Applicable: This is a physical medical device (contact lens), not an algorithm.

7. The type of ground truth used (expert consensus, pathology, outcomes data, etc.):

Implicit Ground Truth: The "ground truth" for this submission is the established safety and effectiveness profile of the predicate device (Durasoft 2 Colors) and general scientific understanding of contact lens materials and manufacturing. The manufacturer is demonstrating that their new device is functionally and materially similar enough to the predicate that it can rely on its established safety profile. This includes:
- Pre-clinical toxicology and manufacturing/chemistry data (K952620, referenced for BENZ-G 5X).
- Material properties (hioxifilcon A) being well-understood.
- Manufacturing processes (lathe-cut) being standard and controlled.

8. The sample size for the training set:

Not Applicable: There is no machine learning "training set" for a contact lens.

9. How the ground truth for the training set was established:

Not Applicable: As above, no machine learning training set or ground truth establishment in that context.

Summary

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4/21/99

SUMMARY OF SAFETY AND EFFECTIVENESS

This summary of 510(k) safety and effectiveness information is being submitted in accordance with the requirements of SMDA 1990 and 21 CFR 807.92.

The assigned 510(k) number is:

K990757

Applicant information:

Date Prepared:

March 12, 1999

Name: Address Cantor & Silver Limited Manor Road, Brackley Northamptonshire England NN13 6ED

Contact Person:

Phone Number: Fax:

Mr. David Cantor Managing Director/President 011 44 1280 702002 011 44 1280 703003

Official Correspondent: And US Consultant

Med-Vice Consulting, Inc. Mr. Martin Dalsing President/CCO 623 Glacier Grand Junction, CO 81503 970.243.5490 970.243.5501

Phone Number: Fax Number:

Device Information:

Regulatory Classification: Class II

86 LPL Product Code:

Trade Name:

CANTOR & SILVER 5X Tinted (hioxifilcon A) Soft (Spherical & Toric) Daily Wear Contact Lens, Tinted.

Classification Name:

Lenses, Soft Contact, Daily Wear

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Equivalent Device:

The CANTOR & SILVER 5X Tinted (hioxifilcon A) Soft (Spherical & Toric) Daily Wear Contact Lens is substantially equivalent to the predicate device in terms of intended use and design. The predicate device is the Durasoft 2 Colors manufactured by Wesley-Jessen.

Device Description:

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The hydrophilic characteristics allow aqueous solutions to enter the lens and in its fully hydrated state the lens is approximately 58% water by weight.

The non-ionic lens material, hioxifilcon A is an ultra high molecular weight copolymer of 2-bydroxyethyl methacrylate (2-HEMA) and 2,3-Dibydroxypropyl Methacrylate (Glycerol Methacrylate, GMA) and cross-linked with ethylene glycol dimethacrylate (EGDMA). It consists of 42% hioxifiloon A and 58% water by weight when immersed in normal saline solution buffered with sodium bicarbonate. The physical properties of the lens are:

Refractive Index	1.515 (dry) 1.404 (hydrated)
Light Transmission (tinted)	greater than 70%
Color Additives	reactive black 5, reactive blue 21, reactive blue 19, reactive blue 4,reactive blue 163, reactive red 11, reactive red 180, reactive yellow 15,reactive yellow 86, or reactive orange 78
Water Content	58 % ±2%
Specific Gravity	1.308 (dry) 1.136 (hydrated)
Oxygen Permeability	$20 X 10^{-11}$ (cm²/sec) (ml O₂/ml x mm Hg @ 35°C), (revised Fatt method)

INDICATED USE:

The CANTOR & SILVER 5X Tinted (hioxifileon A) Spherical Soft Contact Lenses for daily wear are indicated for the correction of visual acuity in aphakic persons with non-diseased eyes with myopia or hyperopia. The lenses may be worn by persons who exhibit refractive astigmatism of 1.50 diopters or less where the assigmatism does not interfere with visual acuity. The lenses are disinfected using a hydrogen peroxide lens care system only, and are available in a frequent replacement program.

The CANTOR & SILVER 5X Tinted (hioxifilcon A) Toric Soft Contact Lenses for daily wear are indicated for the correction of visual acuity in aphakic persons with non-diseased eyes with myopia or hyperopia and/or possesses refractive astigmatism up to 10.00 diopters. The lenses are disinfected using a hydrogen peroxide lens care system only, and are available in a frequent replacement program.

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Substantial Equivalence:

The device will be manufactured according to specified process controls and a Quality Management System certified to ISO 9002 and EN46002 by the National Accreditation of Certification Bodies. The device will undergo manufacturing, packaging and sterilization procedures similar to devices currently marketed and distributed by Cantor & Silver Limited in the United States. The established safety profile (pre-clinical toxicology and manufacturing/chemistry data) of the device is equivalent to the BENZ-G 5X (hioxifilcon A), 510(k) #K952620. The tinting characteristics and parameters of the lens are substantially equivalent to the Durasoft 2 Colors tinted soft contact lens, manufactured Wesley-Jessen. Being similar with respect to indications for use, materials, physical construction and safety & effectiveness to the predicate device, this meets the requirements per section 510(k) of the act regarding substantial equivalence and does not raise different questions of safety and effectiveness than the predicate devices identified above.

The following matrix illustrates that the production method, lens function, and the "listed" color additives and timing characteristics of the CANTOR & SILVER 5X Tinted (hioxifilcon A) Soft (Spherical & Toric) Daily Wear Contact Lens are substantially equivalent to the predicate device.

	Characteristic	CANTOR & SILVER 5XTINTED	DURASOFT 2 COLORS
1.)	PRODUCTIONMETHOD	Lathe-Cut	Lathe-Cut
2.)	LENS FUNCTION	Refractive medium that focuseslight rays from near and distantobjects on the retina, whilecompensating for refractive error,including (astigmatism)	Refractive medium that focuseslight rays from near and distantobjects on the retina, whilecompensating for refractive error,including (astigmatism)
3.)	FDA "listed"colored additives	The reactive colored additivesconsist of reactive black 5,reactive blue 4, reactive blue 19,reactive 21, reactive blue 163,reactive yellow 15, reactive yellow86, reactive orange 78, reactivered 11 and reactive red 180	The colored pigments consist ofiron oxides, chromium oxidegreens, titanium dioxide, [phthalo-cyaninato (2-)] copper, carbazoleviolet and phthalocyanine green.
a.	Usesandrestrictions	The color additives listed abovemay be used to color contactlenses in amounts not to exceedthe minimum reasonably requiredto accomplish the intendedcoloring effect.	The color additives listed abovemay be used to color contactlenses in amounts not to exceedthe minimum reasonably requiredto accomplish the intendedcoloring effect.
4.)	Color AdditiveCharacteristics	The color additives used are notremoved by lens handling andcleansing/disinfecting procedures.The optical and performancecharacteristics are not altered bythe lens coloring process.	The color additives used are notremoved by lens handling andcleansing/disinfecting procedures.The optical and performancecharacteristics are not altered bythe lens coloring process.
5.)	Colors Offered	Blue, Green, Aqua, Yellow,Lavender, Brown, Ultra Violetand Amber	Sky blue, Jade green, Aquamarineand Violet blue

Substantial Equivalence Matrix

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Image /page/4/Picture/1 description: The image shows the logo for the U.S. Department of Health & Human Services. The logo consists of a circular border with the text "DEPARTMENT OF HEALTH & HUMAN SERVICES - USA" arranged around the perimeter. Inside the circle is a stylized symbol featuring three abstract human figures or profiles facing to the right, with flowing lines suggesting movement or connection.

Food and Drug Administration 9200 Corporate Boulevard Rockville MD 20850

APR 2 1 1933

Mr. Martin Dalsing Med. Vice Consulting, Inc. 623 Glacier Drive Grand Junction, CO

Re: K990757 Trade Name: Cantor & Silver 5X Tinted (hioxifilcon A) Soft Contact Lens Regulatory Class: II Product Code: 86 LPL Dated: April 7, 1999 Received: April 12, 1999

Dear Mr. Dalsing:

We have reviewed your Section 510(k) notification of intent to market the device referenced above and we have determined the device is substantially equivalent (for the indications for use stated in the enclosure) to devices marketed in interstate commerce prior to May 28, 1976, the enactment date of the Medical Device Amendments, or to devices that have been reclassified in accordance with the provisions of the Federal Food, Drug, and Cosmetic Act (Act). You may, therefore, market the device, subject to the general controls provisions of the Act. The general controls provisions of the Act include requirements for annual registration, listing of devices, good manufacturing practice, labeling, and prohibitions against misbranding and adulteration.

If your device is classified (see above) into either class II (Special Controls) or class III (Premarket Approval), it may be subject to such additional controls. Existing major regulations affecting your device can be found in the Code of Federal Regulations, Title 21, Parts 800 to 895. A substantially equivalent determination assumes compliance with the current Good Manufacturing Practice requirements, as set forth in the Quality System Regulation (QS) for Medical Devices: General regulation (21 CFR Part 820) and that, through periodic (QS) inspections, the Food and Drug Administration (FDA) will verify such assumptions. Failure to comply with the GMP regulation may result in regulatory action. In addition, FDA may publish further announcements concerning your device in the Federal Register. Please note: this response to your premarket notification submission does not affect any obligation you might have under sections 531 through 542 of the Act for devices under the Electronic Product Radiation Control provisions, or other Federal laws or regulations .

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Page 2 - Mr. Martin Dalsing

This letter will allow you to begin marketing your device as described in your 510(k) premarket notification. The FDA finding of substantial equivalence of your device to a legally marketed predicate device results in a classification for your device and thus, permits your device to proceed to the market.

If you desire specific advice for your device on our labeling regulation (21 CFR Part 801 and additionally 809.10 for in vitro diagnostic devices), please contact the Office of Compliance at (301) 594-4613. Additionally, for questions on. the promotion and advertising of your device, please contact the Office of Compliance at (301) 594-4639. Also, please note the regulation entitled, "Misbranding by reference to premarket notification" (21 CFR 807.97). Other general information on your responsibilities under the Act may be obtained from the Division of Small Manufacturers Assistance at its toll-free number (800) 638-2041 or (301) 443-6597 or at its internet address "http://www.fda.gov/cdrh/dsmamain.html".

Sincerely yours,

A. Ralph Rosenthal

A. Ralph Rosenthal, M.D. Director Division of Ophthalmic Devices Office of Device Evaluation Center for Devices and Radiological Health

Enclosure

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INDICATIONS FOR USE STATEMENT

CANTOR & SILVER 5X TINTED (hioxifilcon A) Soft (Spherical & Toric) Device Name: Daily Wear Contact Lens, Tinted.

INDICATIONS FOR USE:

(PLEASE DO OT WRITE BELOW THIS LINE - CONTINUE ON ANOTHER PAGE IF NEEDED)

Concurrence of CDRH, Office of Device Evaluation (ODE)

Prescription Use V (Per 21 CFR 801.109)

Over-The-Counter Use

(Optional Format 1-2-96)

SRRell

(Division Sign-Off) Division of Ophthalmic Devices

510(k) Number K990757

Regulation Number and Section

§ 886.5925 Soft (hydrophilic) contact lens.

(a)
Identification. A soft (hydrophilic) contact lens is a device intended to be worn directly against the cornea and adjacent limbal and scleral areas of the eye to correct vision conditions or act as a therapeutic bandage. The device is made of various polymer materials the main polymer molecules of which absorb or attract a certain volume (percentage) of water.(b)
Classification. (1) Class II if the device is intended for daily wear only.(2) Class III if the device is intended for extended wear.
(c)
Date PMA or notice of completion of a PDP is required. As of May 28, 1976, an approval under section 515 of the act is required before a device described in paragraph (b)(2) of this section may be commercially distributed. See § 886.3.