The Crystal Tinted Soft Contact Lens is indicated for daily wear to enhance and/or alter the apparent eye color. Except for decreased light transmittance due to the tint intensity, the pretinted lens optical parameters remain the same as originally prescribed for the user prior to tinting. The lens may be disinfected using a chemical disinfection system only.
Device Story
Crystal Tinted Soft Contact Lenses are color-enhanced, hydrophilic soft contact lenses. The device is produced by modifying previously prescribed clear soft contact lenses via a tinting process. Certified reactive dyes (e.g., Reactive Blue 19, Reactive Yellow 86) are permanently fixed to the polymer on the anterior surface corresponding to the iris. The process involves affixing dyes to hydroxyl groups of the lens polymer, followed by thorough washing to remove unbound reactive additives. The device is used by patients for daily wear to alter eye color. The practitioner selects tint intensity and color. The lens requires maintenance in a hydrated state using compatible storage solutions; chemical disinfection is required. The tinting process does not alter the refractive optical parameters of the original lens, though light transmittance is decreased. Benefits include cosmetic enhancement of eye appearance.
Clinical Evidence
Bench testing only. Bioburden testing (aerobic bacteria and fungi) showed <4 CFU per sample. Toxicity studies performed: ISO Ocular Irritation Study in rabbits, ISO Acute Systemic Toxicity Study in mice, and Cytotoxicity using the ISO Elution Method. All results were negative.
Technological Characteristics
Hydrophilic soft contact lens material modified with FDA-listed reactive dyes (Reactive Blue 19, 21, 163; Yellow 86, 15; Black 5; Red 11, 180). Dyes are permanently fixed to polymer hydroxyl groups. Daily wear modality. Requires chemical disinfection. Optical parameters remain consistent with the base lens, excluding reduced light transmittance.
Indications for Use
Indicated for daily wear to enhance or alter apparent eye color in patients previously prescribed soft contact lenses. Contraindicated for use with non-chemical disinfection systems.
Regulatory Classification
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.
Predicate Devices
Adventure Tints, Color Enhanced Soft Contact Lens (K984098)
Submission Summary (Full Text)
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K 993489
# 510(k) NOTIFICATION SUMMARY
Summary Prepared: 10/12/99 Application Date: 10/14/99
Applicant/Manufacturing and Packaging:
Crystal Reflections, Int., Inc. 170 N. La Canada, Ste. 80 Green Valley, AZ 85614
(800)807-8722
Jack Carter, President
Contact Person (Submission Correspondent):
Robert Breece, O.D. BioMed Devices Corporation 1325 Progress Drive Front Royal, VA 22630
(540) 636-7976 Fax (540) 635-8846
Trade Name: Crystal Tinted Soft Contact Lenses
Classification Name: Lenses, Soft Contact, Daily Wear
Soft Contact Lens Common Name:
{1}------------------------------------------------
#### Description of CRYSTAL TINTED SOFT CONTACT LENSES:
The CRYSTAL TINTED SOFT CONTACT LENSES are available in Aqua, Amber, Roval Blue, Sky Blue, Sapphire Blue, Emerald Green, Mint Green, Green, Light Yellow, Dark Yellow, Light Red, Dark Red, Brown, Black and Orange. They are available with or without tinted centers (pupillary area). The practitioner may also choose tint intensity and custom mix colors (via consultation with CRII).
CRYSTAL TINTED SOFT CONTACT LENSES are color enhanced soft contact lenses that have been previously prescribed for a specific patient. They have been supplied to CRII by a certified supplier to be modified by a tinting process. This process uses color additives that have been supplied by a certified supplier and listed as safe for contact lenses containing hydroxyl groups in accordance with FDA color additive regulations. 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.
CRYSTAL TINTED SOFT CONTACT LENSES are tinted using certified Reactive dyes listed by the FDA as approved for use with contact lenses. The lens material is modified by permanently fixing tints to the polymer using the following color additives, either alone or in combination: Reactive Blue 19, Reactive Blue 21, Reactive Yellow 86, Reactive Black 5, Reactive Red 11, Reactive Blue 163, Reactive Orange 78, Reactive Yellow 15, and Reactive Red 180.
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.
{2}------------------------------------------------
#### Bioburden/Toxicology Testing:
Bioburden testing was performed at NAMSA in Northwood, Ohio in February, 2000. Ten samples were tested for two types of microorganisms: aerobic bacteria and fungi. There were less than 4 CFU's recoverable for any sample, passing according to NAMSA testing standards.
All dyes to be used in the custom tinting process were mixed together and applied to (hydrophilic) soft contact lenses. The contact lenses were then subjected to the following three Toxicity Studies by the North American Sclence Associates Incorporated: ISQ Ocular Irritation Study In the Rabbit, ISO Acute Systemic Toxicity Study in the Mouse, and Cytotoxicity Using the ISO Elution Method. All results were negative.
{3}------------------------------------------------
# "Statement of Indications for Use"
Device Name:
Crystal Tinted Soft Contact Lens
### INDICATIONS FOR USE:
The Crystal Tinted Soft Contact Lens is indicated for daily wear to enhance and/or alter the apparent eye color.
Except for decreased light transmittance due to the tint intensity, the pretinted lens optical parameters remain the same as originally prescribed for the user prior to tinting. The lens may be disinfected using a chemical disinfection system only.
{4}------------------------------------------------
CRII claims the CRYSTAL TINTED CONTACT LENS that it custom tints from contact lenses that were previously prescribed for each individual patient by his/her personal eye care professional, is substantially equivalent to the following "legally marketed predicate device":
#### PREDICATE DEVICE:
Manufacturer: Adventures in Colors, Inc.
Adventure Tints, Color Enhanced Soft Contact Device names: Lens (K984098)
{5}------------------------------------------------
| | Characteristic | CRYSTAL TINTED SOFT<br>CONTACT LENS | PREDICATE<br>DEVICE |
|-----|------------------------------------|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|----------------------------------------------------------------------------------------|
| 1.) | INDICATION | Daily Wear, Soft (hydrophilic) contact<br>lens | SAME |
| 2.) | INTENDED USE | The CRYSTAL TINTED SOFT<br>CONTACT LENS is indicated for daily<br>wear to enhance and/or alter the<br>apparent eye color. | SAME |
| 3.) | LENS FUNCTION | Refractive medium that focuses light<br>rays from near and distant objects on<br>the retina, while compensating for<br>refractive error. | SAME |
| 4.) | MATERIALS | | |
| a. | Polymer | Hydrophilic | SAME |
| b. | Additives | FDA Listed Reactive Dyes | SAME |
| 5.) | FDA "LISTED"<br>COLOR<br>ADDITIVES | The reactive color additives are as<br>follows: Reactive Blue 19, Reactive<br>Blue 21, Reactive Yellow 86, Reactive<br>Black 5, Reactive Red 11, Reactive<br>Blue 163, Reactive Orange 78,<br>Reactive Yellow 15 and Reactive Red<br>180. | SAME |
| a. | Uses and<br>Restrictions | The color additives listed above may be<br>used to color soft contact lenses in<br>amounts not to exceed the minimum<br>reasonably required to accomplish the<br>intended effect. | SAME |
| b. | Color Additive<br>Characteristics | The color additives are not removed by<br>lens handling and cleaning/disinfecting<br>procedures. The optical performance<br>characteristics are not altered by the<br>lens tinting process. | SAME |
| c. | Colors Offered | Aqua, Amber, Royal Blue, Sky blue,<br>Sapphire Blue, Emerald Green, Mint<br>Green, Green, Light Yellow, Dark<br>Yellow, Light Red, Dark Red, Brown,<br>Black and Orange | Blue, Green, Aqua,<br>Yellow, Lavender,<br>Brown, Ultra Violet (hot<br>pink) and Amber |
| 6.) | PRODUCTION<br>METHOD | FDA Listed Reactive Dye molecules<br>replace Hydroxyl (polymer) ions | SAME |
{6}------------------------------------------------
Image /page/6/Picture/1 description: The image shows the logo for the U.S. Department of Health & Human Services. The logo consists of a circular seal with the text "DEPARTMENT OF HEALTH & HUMAN SERVICES - USA" around the perimeter. Inside the circle is an abstract symbol that resembles a stylized caduceus or a bird-like figure with three wing-like shapes.
#### Public Health Service
Food and Drug Administration 9200 Corporate Boulevard Rockville MD 20850
## APR 1 4 2000
Crystal Reflections, Int., Inc. c/o Robert Breece, O.D. BioMed Devices Corporation 1325 Progress Drive Front Royal, VA 22630
Re: K993489 Trade Name: CRYSTAL TINTED SOFT CONTACT LENS For Daily Wear (tinted with Reactive Dyes) Regulatory Class: II Product Code: 86 LPL Dated: April 3, 2000 Received: April 4, 2000
Dear Dr. Breece:
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 .
{7}------------------------------------------------
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" (21CFR 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/dsma/dsmamain.html".
Sincerely yours,
A. Ralph Rosenthal
A. Ralph Rosenthal, M.D. Director Division of Ophthalmic, Ear, Nose and Throat Devices Office of Device Evaluation Center for Devices and Radiological Health
. Enclosure
{8}------------------------------------------------
# "Statement of Indications for Use"
Device Name:
Crystal Tinted Soft Contact Lens
#### INDICATIONS FOR USE:
The Crystal Tinted Soft Contact Lens is indicated for daily wear to enhance and/or alter the apparent eye color.
Except for decreased light transmittance due to the tint intensity, the pretinted lens optical parameters remain the same as originally prescribed for the user prior to tinting. The lens may be disinfected using a chemical disinfection system only.
E.j. C, PhD.
(Division Sign-Off)
**Division of Ophthalmic Devices**
510(k) Number. K 993489
**Prescription Use**
**(Per 21 CFR 801.109)**
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Part 1 — Search, results, and everyday workflows 16 min
Part 2 — Embeddings: the galaxy map 3 min
1. Search: exact and fuzzy
Type a phrase like "coronary artery calcification" into the search box. You get two kinds of results. Exact results match the literal phrase — prefix searches work ("coronary artery calcificati") but suffix searches do not. Fuzzy results match on the meaning and intent of your phrase rather than the exact words, and are sorted by relevance score. Hover over the Exact or Fuzzy badge on any row to see exactly why it matched.
Use the checkboxes above the results to narrow: SaMD keeps only software-only devices, AI / ML keeps only devices with AI.
Exact vs. fuzzy search: what's the difference?
Exact matches on the literal phrase (prefix search works, suffix does not). Fuzzy matches on the meaning and intent of the phrase rather than the exact words. Hover over the badge on any row to see why it matched.
You search "coronary artery calcification" and want only software devices with AI. What two filters do you apply?
Narrow by SaMD (software-only devices), then narrow by AI/ML (devices with AI).
2. The results table
Scroll right in the results table. The intended use is extracted for you — no need to open the PDF. The device story gives a high-level snapshot of what the device does and how it's used. The AI Performance sub-table shows each output name, acceptance criteria, observed values, and development/test dataset descriptions — the same format Innolitics uses for regulatory strategy outputs, and the fastest high-level fingerprint of an AI device. It is AI-generated but has been very reliable in practice.
Where do you find a device's intended use without opening the PDF?
Scroll right in the search results table. The intended use column is extracted for you; no need to dig into the 510(k) summary PDF.
What does the AI Performance sub-table show, and why is it useful?
Output name, acceptance criteria, observed values, development dataset description, and test dataset description. It's the same format we use for regulatory strategy output and Fast 510(k) input, and the fastest high-level fingerprint of an AI device. AI-generated but reliable in practice.
3. Judging fuzzy relevance
Fuzzy results trail off in relevance as you scroll. Use three signals to decide how far down to go: the fuzzy badge explanations, the intended use column, and whether your target output (e.g., Cobb angle) still appears in the AI Performance sub-table. Once it stops appearing, you're past the relevant zone. A top hit with a low score (~0.4) and a stretched explanation is a hint the closest predicates are far away — the project may be headed for De Novo. Note the fuzzy search is a pattern match: it doesn't handle negation ("not") well, and hardware devices can appear — filter by SaMD/AI ML to cut them.
How do you judge how far down fuzzy search results to go?
Use the relevancy signals: the fuzzy badge explanations, the intended use column, and whether the target output (e.g., Cobb angle) still appears in the AI Performance sub-table. Once it stops appearing, results are trailing off in relevancy.
4. Device detail page: chat and citations
Click a device name to open its detail page: device facts on the left, a chat window on the right. Ask something like "Describe the training data". The answer carries little citation bubbles — click one to jump to the highlighted passage in the source PDF, so you can verify every AI answer against the document. There's also a Download PDF button for sharing.
How do you verify an AI chat answer on the device detail page?
Click the citation bubbles to jump to the relevant highlight in the source document.
Reading rule for every project: how many summaries do you read in full?
At least the three most relevant 510(k) or De Novo summaries, in full. After that, use targeted chat questions to confirm your memory quickly. The tool supports this professional habit — it doesn't replace it.
5. Side-by-side comparison
Select multiple rows in the results table (aim for under ~10), then open the PDF Viewer tab. Ask one question — it goes to all selected devices in parallel, each with citations. This is the fastest way to compare and contrast devices: training data, PCCP scope, how they handled adding new scanners, and so on.
What does the side-by-side PDF viewer mode do?
Select multiple devices, open the PDF viewer tab, and ask one question (e.g., "Describe the training data"). It queries all selected devices simultaneously with citations, so you can compare and contrast quickly.
6. Collections
With rows selected, go to the Collections tab and create a labeled collection (e.g., "Cobb Angle Project"). Reload that selection any time — before a client call, pull up the collection and ask questions across all of its devices at once.
How do you save a set of selected devices for later use?
Select the rows, go to the Collections tab, and create a labeled collection (e.g., "Cobb Angle Project"). You can reload the selection anytime and carry it into the PDF viewer and other tabs that support selections.
7. Product codes and the regulations tree
Click a product code in the results to jump to it in the regulations tree — identification text, sibling product codes, and devices you can open in a PDF viewer on the right. Click a regulation number to see its identification, special controls, and related product codes. You can also search by product code or regulation number at the top of the tree. Always read the special controls if any exist for your device — it broadens your search and sharpens pre-kickoff research.
What can you do from the regulations tree view?
Browse product codes and regulation numbers, read the identification text and special controls, browse sibling product codes, open device PDFs on the right, and search by product code or regulation number at the top of the tree.
8. Chart view
Click Show Chart and segment by regulation number (or product code) to see which regulations dominate your result set. Clicking a regulation takes you into the regulations tree. Great for spotting that most matches are, say, hardware laparoscopic devices — a cue to go back and filter.
How do you see which regulations dominate a search result set?
Click "Show Chart" and segment by Regulation Number. Clicking a regulation takes you to the regulations tree.
9. The predicate graph
Open the Predicates tab for a family-tree view of predicate relationships. Click a node to trace its parents and children; selections from search carry over pre-selected. Commonly predicated devices are worth reading — a lot of people predicated them for a reason. The visual lineage is also handy on client calls, e.g. to show how a predicate family evolved and justify why your predicate still holds.
In the predicate graph, why are commonly predicated devices worth reading?
A lot of people predicated them for a reason. Clicking a node traces parents and children, and selections from search carry over pre-selected.
10. Embeddings: the galaxy map
The Embeddings tab plots every matching document in a 2-D "galaxy map" where semantically similar devices cluster together. Hover or click clusters to explore, and let AI label the clusters for you. Embeddings beat product codes for grouping: two devices can carry different product codes (LLZ vs. QIH) yet do the same thing — the embedding captures the meaning of the intended use and device story. This is also exactly how retrieval-augmented generation (RAG) works under the hood, and it makes a great visual on client calls.
Try it yourself
Head to the search page and work through a few of these AI/ML fuzzy searches to build intuition: perivascular fat on CT · aortic valve calcification opportunistic screening on noncontrast CT · breast cancer prediction on digital pathology slides · autism detection · gestational age prediction · a hearing aid that can also detect a pulse · foundation model based analysis of ECG · large language models · penetration test. Watch how the relevance scores, intended use, and AI Performance tables tell you when results stop being meaningful.