HDS HI 1.54™ rigid gas permeable contact lenses are indicated for daily wear as recommended by the eye care practitioner. HDS HI 1.54™ rigid gas permeable spheric and bifocal contact lenses are indicated for the correction of refractive ametropia in not-aphakic persons with non-diseased eyes that are nearsighted (myopic), farsighted (hyperopic), and may exhibit corneal astigmatism up to 4.00 diopters that does not interfere with visual acuity. HDS HI 1.54™ toric contact lenses are indicated to correct astigmatism of up to 6.00 diopters. HDS HI 1.54™ bifocal lenses are indicated to treat presbyopia up to +4.00 D add power. HDS HI 1.54™ contact lenses are indicated for management of irregular corneal conditions such as keratoconus, pellucid marginal degeneration, or following penetrating keratoplasty, radial keratotomy, or LASIK surgery, in otherwise non-diseased eyes.
Device Story
HDS HI 1.54 (pahrifocon A) is a rigid gas permeable (RGP) contact lens; lathe-cut from thermoset copolymer (acrylate, silicone acrylate, fluorosilicone acrylate). Available in spherical, aspheric, bifocal, or toric designs. Posterior curve provides fit; anterior curve provides refractive correction; peripheral curve system facilitates tear exchange. Used by eye care practitioners to correct refractive errors and manage irregular corneal conditions. Patients wear lenses daily. Clinical benefit includes improved visual acuity and management of corneal irregularities. Device is non-implantable; worn on the ocular surface.
Clinical Evidence
Multisite, randomized, double-masked clinical study; 76 subjects (152 eyes) enrolled; 64 subjects completed. Primary endpoints: safety (slit lamp findings, adverse events) and efficacy (visual acuity, keratometry, refraction, lens comfort). No adverse events reported. Slit lamp findings primarily grade 1 (trace). Lens comfort rated 'very good' (4.04/4.07). Refractive changes within 1.00D for >93% of eyes. Study supports substantial equivalence.
Technological Characteristics
Thermoset copolymer (acrylate, silicone acrylate, fluorosilicone acrylate). Refractive index 1.54; Dk 22x10-11 (ISO 9913-1). Hardness 84 Shore D. Lathe-cut manufacturing. Plasma treatment optional. Clear or tinted versions.
Indications for Use
Indicated for daily wear in non-aphakic, non-diseased eyes for correction of myopia, hyperopia, and corneal astigmatism (up to 4.00D for spheric/aspheric/bifocal, up to 6.00D for toric). Also indicated for presbyopia (up to +4.00D add) and irregular corneal conditions (keratoconus, pellucid marginal degeneration, post-penetrating keratoplasty, post-radial keratotomy, or post-LASIK).
Regulatory Classification
Identification
A rigid gas permeable contact lens is a device intended to be worn directly against the cornea of the eye to correct vision conditions. The device is made of various materials, such as cellulose acetate butyrate, polyacrylate-silicone, or silicone elastomers, whose main polymer molecules generally do not absorb or attract water.
Predicate Devices
FluoroPerm 30 (paflufocon c)
Submission Summary (Full Text)
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K082799
# JAN 2 7 2009
# 510(k) Summary
# Date of Summary
January 19, 2009
# Submitter
な
| Company Name: | |
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| Address: | |
| Phone: | |
| Fax: | |
| Registration: | |
Paragon Vision Sciences 945 East Impala Ave., Mesa, AZ 85204 480-892-7602 480-892-3226 Owner Operator # 9024618
## Manufacturer Information
| Company Name: | |
|---------------|--|
| Address: | |
| Phone: | |
| Fax: | |
| Registration: | |
Paragon Vision Sciences 945 East Impala Ave., Mesa, AZ 85204 480-892-7602 480-892-3226 Site Registration #2020433
# Official Correspondent
| Name: | |
|----------|--|
| Address: | |
| Address: | |
| Phone: | |
| Fax: | |
William E. Meyers, Ph.D. % Paragon Vision Sciences 945 East Impala Ave., Mesa, AZ 85204 480-507-7606 480-892-3226
## Device Name
HDS HI 1.54 Trade Name pahrifocon A USAN Name
# Classification & Ophthalmic Devices Branch
| Common Name: | Contact lens |
|-----------------------|------------------------------------------------------------------------------------------|
| Product Code: | HQD |
| Classification Name: | Rigid gas permeable contact lens for daily wear |
| Classification Panel: | Ophthalmic |
| Reference: | 21 CFR 886.5916; rigid gas permeable contact lens,<br>Class II - daily wear contact lens |
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Marketed device to which equivalence is claimed is FluoroPerm 30 (paflufocon c).
HDS HI 1.54 (pahrifocon A) rigid gas permeable contact lenses for daily wear are available as lathe cut contact lenses with spherical, aspheric, bifocal or toric anterior and/or posterior, or, bitoric surfaces in clear and tinted versions. The posterior curve is selected so as to properly fit an individual eye and the anterior curve is selected to provide the necessary optical power to correct refractive error. A peripheral curve system on the posterior surface allows tear exchange between the lens and the cornea.
The HDS HI 1.54 rigid gas permeable contact lens material is a thermoset copolymer derived from acrylate, silicone acrylate, and fluorosilicone acrylate monomers, dimers and oligomers.
The HDS HI 1.54 rigid gas permeable tinted lenses offer a handling aid for locating the lens and may be plasma treated.
| Refractive Index | 1.54 |
|----------------------------------|----------------------|
| Luminous Transmittance+ (Clear) | 97% |
| Luminous Transmittance (Blue) | 93% |
| Luminous Transmittance (Green) | 94 |
| Wetting Angle (Receding Angle)++ | 44° |
| Wetting Angle (Sessile Drop)+++ | 77° |
| Specific Gravity | 1.12 |
| Hardness (Shore D) | 84 |
| Water Content | <1% |
| Oxygen Permeability* | 22x10-11 Dk at 35° C |
* Determination of the Spectral and Luminous Transmittance, ISO 8599:1994
Adapted from: A New Method for Wetting Angle Messurement; Madigan, et al., International Eyecare, 01/1998, vol. 2, go. 1, p. 45
*** Sessile Drop Technique per ANSI Z80.20. 8.11
*(cm3/sec) (mL O2) / (mL x mm Hg) ISO/ANSI Method, ISO 9913-1
# Indications for use
HDS HI 1.54™ rigid gas permeable contact lenses are indicated for daily wear as recommended by the eye care practitioner.
HDS HI 1.54™ rigid gas permeable spherical, aspheric and bifocal contact lenses are indicated for the correction of refractive ametropia in not-aphakic persons with non-diseased eyes that are nearsighted (myopic), farsighted (hyperopic), and may exhibit corneal astigmatism up to 4.00 diopters that does not interfere with visual acuity. HDS HI 1.54™ toric contact lenses are indicated to correct astigmatism of up to 6.00 diopters.
HDS HI 1.54™ bifocal lenses are indicated to treat presbyopia up to +4.00 D add power.
HDS HI 1.54™ contact lenses are indicated for management of irregular corneal conditions such as keratoconus, pellucid marginal degeneration, or following penetrating keratoplasty, radial keratotomy, or LASIK surgery, in otherwise non-diseased eyes.
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| Property | HDS HI 1.54<br>Un-irradiated | HDS HI 1.54<br>Irradiated | FluoroPerm 30 |
|----------------------------------------------|------------------------------|---------------------------|------------------------|
| Specific Gravity | 1.12 | - | 1.14 |
| Refractive Index | 1.54 | 1.54 | 1.466 |
| % Light Transmittance* | 93 | 94 | 94 |
| % Water Content | 1 | 1 | <1 |
| Oxygen<br>Permeability(Dk)** | 22 | 22 | 30 |
| Hardness (Shore D) | 84 | 84 | 84 |
| Modulus, kgf/cm² | 16,990 | 19,000 | 16,660 |
| Flexure Stress, kgf/cm² | 559 | 700 | 505 |
| Flexure Strain, % | 4 | 5 | 4 |
| Toughness, gf-mm | 429 | 560 | 440 |
| Preservative Uptake,<br>µg/ cm² | CDG 0.35<br>PAPBG 0.01 | - | CDG 0.80<br>PAPBG 0.01 |
| Preservative Release,<br>µg/ cm² | CDG 0.02<br>PAPBG 0.01 | - | CDG 0.05<br>PAPBG 0.01 |
| Soxhlet Extractables, wt<br>%,Hexane / Water | 3.87 / 0.66 | 3.44/0.66 | 3.45 / 0.10 |
| Residuals, wt, %,<br>Acetonitrile, VC-VP | 2.67-0.72 | 2.36-0.15 | - |
| Wetting Angle<br>Receding*/Sessile Drop* | 44/77 | - | 13/68 |
The above indication for use is identical to that of the predicate device except for replacement of visual acuity with refractive ametropia as requested.
*Blue tinted material; Power = plano, Center Thickness = 0.15 ± 0.02 mm
**(cm2/sec) (mL O2) / (mL x mm Hg) ISO/ANSI Method, ISO 9913-1
T Adapted: A New Method for Wetting Angle Measurement; Madigan, et. al., International Eyecare, 01/1998, vol. 2, no 1, p. 45
* ANSI Z80.20-1998 (8.11.1 - 8.11.1.4)
### Summary of Non clinical test results
In addition to the non-clinical tests indicated by the table above, studies were performed on the saline extractives following the method of the USP <88> BIOLOGICAL REACTIVITY TEST and toxicological procedures for Ocular Irritation, Systemic Toxicity and Cytotoxicity (ISO 10993-10, ISO 10993-11). These studies found the saline extractives to be small and in line with the predicate material and no indications of toxicity nor irritation were observed in the procedures.
### Summary of clinical results
Seventy six (76) subjects (152 eyes) were enrolled and dispensed in the multisite, randomized, double masked clinical study to provide data that support the presumption of equivalence of the HDS HI 1.54™ investigational
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lenses to a historical control contact lens. Sixty four (64) subjects (84.2%) completed the study and 12 subjects (15.8%) were discontinued. The population demographics were similar to previous contact lens studies.
Of the ten Test subjects who discontinued, Difficulty Cleaning Lenses (3 subjects) and Poor Comfort (2 subjects), Poor Vision (1 subject) and Poor Comfort (2 subjects) accounted for 80% of the discontinuations. Two Control subjects discontinued, one for Loss of Interest and one for Poor Comfort
There were no adverse events reported during the study. The only study related complications were slit lamp findings of grade 3 for injection. Each of these resolved without complication.
Slit lamp findings were reported at frequencies within expected values and the positive slit lamp observations were primarily grade 1 (trace). Staining and injection were reported most frequently. Subject reports of no symptoms were lowest at the 1 week visit for both the Completed Test and Control eyes and then increased over the remainder of the study. Discomfort was reported most frequently (13.7% of Completed Test eye visits and 12.3% of Completed Control Eye visits). .
Lens comfort was rated as an average of 4.04 (very good) for the Completed Test eyes and 4.07 (very good) for the Completed Control eyes. This compared to a baseline value of 3.96 for the Test eyes and 4.23 for the Control eyes with the pre-study habitual correction.
Keratometry changes were within 1.00 diopter for 93.1% of the Completed Test eyes and 96.4% of the Completed Control eyes. Manifest refraction changes were within 1.00 diopter for 97.9% of the Completed Test eyes and 98.2% of the Completed Control eyes.
One eye of the 63 Completed Test eyes targeted for full distance vision was reported to show a decrease in contact lens visual acuity from the baseline best corrected visual acuity of greater than 0.20 logMAR. The reason for the loss was a reported baseline measurement error. One eye of the 48 Completed Control eyes targeted for full distance vision was reported to show a decrease in contact lens visual acuity from the baseline best corrected visual acuity of greater than 0.20 logMAR. The reason cited for the decrease was lenses being switched eye for eye.
Average lens wearing time was stable at over 13 hours per day for the Completed Test and Control subjects and showed a decrease over time for the discontinued eyes.
Forty nine (49) lens replacements were made for 40 of the 152 eyes dispensed in the study. The replacements were predominantly for deposits (8) or parameter and power change (21) which together account for 59% of the lens replacements. Discomfort was cited for 18.4% (5 test and 4 control lenses) of the lens replacements. Five lenses (10%) were replaced due to loss.
The results of the clinical evaluation of the Paragon HDS HI 1.54™ contact lenses provide evidence of substantial equivalence to the historical control, Paragon Fluroperm® 30 contact leuses.
#### Conclusions drawn from studies
The conclusions drawn from the nonclinical and clinical tests (discussed above) are that the device is as safe, as effective, and performs as well as or better than the predicate device .
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# Appendix Two
# Indications for Use Form
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: 上一篇:
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Image /page/5/Picture/1 description: The image shows the seal of the Department of Health & Human Services (HHS). The seal features a stylized eagle with three wings, representing the three levels of government: federal, state, and local. The words "DEPARTMENT OF HEALTH & HUMAN SERVICES • USA" are arranged in a circular pattern around the eagle.
Food and Drug Administration 9200 Corporate Boulevard Rockville MD 20850
JAN 2-7 2009
Paragon Vision Sciences William E. Meyers, Ph.D. Vice President, Science and Technology 945 East Impala Ave. Mesa AZ 85204
Re: K082799
Trade/Device Name: HDS HI 1.54 (pahrifocon A) Rigid Gas Permeable Contact Lens for daily wear
Regulation Number: 21 CFR 886.5916 Regulation Name: Rigid gas permeable contact lens Regulatory Class: II Product Code: HOD Dated: January 19, 2009 Received: January 21, 2008
Dear Dr. Meyers:
We have reviewed your Section 510(k) premarket notification of intent to market the device referenced above and have determined the device is substantially equivalent (for the indications for use stated in the enclosure) to legally marketed predicate 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) that do not require approval of a premarket approval application (PMA). 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. Ilisting 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 (PMA), 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 898. In addition, FDA may publish further announcements concerning your device in the Federal Register.
Please be advised that FDA's issuance of a substantial equivalence determination does not mean that FDA has made a determination that your device complies with other requirements of the Act or any Federal statutes and regulations administered by other Federal agencies. You must comply with all the Act's requirements, including, but not limited to: registration and listing (21 CFR Part 807); labeling (21 CFR Part 801); good manufacturing practice requirements as set forth in the quality systems (QS) regulation (21 CFR Part 820); and if applicable, the electronic product radiation control provisions (Sections 531-542 of the Act); 21 CFR 1000-1050.
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This letter will allow you to begin marketing your device as described in your Section 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), please contact the Center for Devices and Radiological Health's (CDRH's) Office of Compliance at (240) 276-0115. Also, please note the regulation entitled, "Misbranding by reference to premarket notification" (21CFR Part 807.97). For questions regarding postmarket surveillance, please contact CDRH's Office of Surveillance and Biometric's (OSB's) Division of Postmarket Surveillance at 240-276-3474. For questions regarding the reporting of device adverse events (Medical Device Reporting (MDR)), please contact the Division of Surveillance Systems at 240-276-3464. You may obtain other general information on your responsibilities under the Act from the Division of Small Manufacturers, International and Consumer Assistance at its toll-free number (800) 638-2041 or (240) 276-3150 or at its Internet address http://www.fda.gov/cdrh/industry/support/index.html.
Sincerely yours,
Madina B. Eylands. and
Malvina B. Eydelman, M.D Director Division of Ophthalmic and Ear, Nose and Throat Devices Office of Device Evaluation Center for Devices and Radiological Health
Enclosure
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### Indications Statement
510(k) Number : K082799
Device Name: HDS HI 154
Indications For Use:
HDS HI 1.54™ rigid gas permeable contact lenses are indicated for daily wear as recommended by the eye care practitioner.
HDS HI 1.54™ rigid gas permeable spheric and bifocal contact lenses are indicated for the correction of refractive ametropia in not-aphakic persons with non-diseased eyes that are nearsighted (myopic), farsighted (hyperopic), and may exhibit corneal astigmatism up to 4.00 diopters that does not interfere with visual acuity. HDS HI 1.54™ toric contact lenses are indicated to correct astigmatism of up to 6.00 diopters.
HDS HI 1.54™ bifocal lenses are indicated to treat presbyopia up to +4.00 D add power.
HDS HI 1.54™ contact lenses are indicated for management of irregular corneal conditions such as keratoconus, THDO 111 1.54 - ochaov rentoo or following penetrating keratoplasty, radial keratotomy, or LASIK surgery, in otherwise non-diseased eyes.
# PLEASE DO NOT WRITE BELOW THIS LINE-CONTINUE ON ANOTHER PAGE IF NEEDED) Concurrence of CDRH, Office of Device Evaluation (ODE)
Prescription Use X
Over-The Counter Use
Signature
OR
(Optional Format 1-2-96)
Division Sign-Off) Division of Ophthalmie and Ear, Nose and Throat Devices
**510(k) Number** K082799
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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.
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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.
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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.
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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.
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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.
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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.