What Canadian e‑commerce sellers need to list a usable iridology eye chart

What is a comparable provider eye chart and how clinics use it

a comparable provider eye chart is a mapped diagram of the iris used as a visual reference during training, documentation and client consultations. Practitioners use charts to mark zones, note findings and explain observations to students or clients. Charts are also used as overlays in comparable provider imaging software when clinicians capture iris photos with an iriscope or comparable provider camera and want to annotate or align features consistently.

Visual reference requirement: what a usable comparable provider chart must show

Buyers must be able to “see and use” the chart immediately. That means a commercial product listing should include at least one high‑resolution, full‑frame sample image and downloadable files in the formats listed below. The sample image should demonstrate scale (diameter in mm or a printed scale bar) and show both left and right eye orientations.

Explanatory image (example):

The example above shows how a chart sits next to an iris photo during capture; sellers should include a similar sample image so buyers can judge compatibility with cameras and software.

Formats sellers should offer

Different buyers want different things. Offer at least these deliverables so buyers can immediately use the chart for printing, classroom display and software overlays:

• Print file: PDF or TIFF at 300 DPI or higher, CMYK, with printer bleed and a printable scale bar.
• Vector overlay: SVG and/or PDF vector file so clinics can scale the chart without quality loss.
• Digital overlay: PNG with alpha channel (transparent background) sized for common camera image resolutions so it can be layered in software.
• Software layer: if you provide a prepackaged overlay for comparable provider software (for example Maikong CVAdvance), state the software version and language compatibility explicitly.
• Scaled poster: printable poster PDF (A1/A2) and a laminated version for point‑of‑sale or classroom use if you supply physical products.

Why offer both vector and PNG?

Vector files preserve crisp lines at any print size; PNG with alpha is the practical format for image overlays in analysis software that uses raster input. Supplying both reduces returns and buyer questions.

Orientation and labelling: left vs right eye conventions for clinic records

Make orientation explicit. Two common conventions exist: charts showing left and right iris side‑by‑side with ‘L’ and ‘R’ labels, or single‑eye charts for separate listings. For clinic records we recommend charts that:

• Label each chart clearly “Left eye (patient’s left)” and “Right eye (patient’s right)”.
• Include a small orientation icon showing whether the iris is viewed from the practitioner’s perspective or the patient’s (this avoids mirror-image mistakes).
• Provide a version with the pupil at exact centre and a scale marker so overlays align with captured iris photos.

Key elements to include on a commercial chart

Buyers expect these elements on a professional comparable provider eye chart:

• Radial zoning or sector lines (digestive, nervous, immune, etc.) with a simple numeric grid to locate marks quickly.
• Common annotations (e.g., pigment spots, rings, lacunae) presented as legend icons and short labels.
• Scale indicator (diameter in mm or printed scale bar) and grid coordinates so marks can be referenced in notes.
• Versioning and language flags — label the chart edition and the language (English/French) to suit Canadian buyers.

Practical use cases for sellers to spell out in listings

Describe how the chart will be used; this helps buyers visualise immediate utility and reduces pre‑sale questions. Useful scenarios to include on product pages:

• Classroom training: printable posters or laminated charts for teaching stations.
• Point‑of‑sale materials: laminated A2/A1 charts for demonstrations at trade shows or clinics.
• Software overlays: transparent PNG or SVG overlays supplied for common comparable provider software packages.
• Record keeping: charts with a writable margin for patient ID, date and clinician initials.

Compatibility checklist for digital charts (what to state on the listing)

Digital compatibility is the frequent blocker for buyers. State these items clearly on the product page:

• Supported overlay formats: PNG (alpha), SVG, PDF (vector), TIFF.
• Typical image dimensions provided (e.g., 3840×2880 px) so buyers can match camera output.
• Operating systems supported for bundled software (e.g., Windows 7–11, macOS where applicable).
• Instructions for importing an overlay into common programs (simple steps or a short PDF guide).

Common mistakes to avoid when listing a chart

Typical reasons listings attract returns or questions:

• Ambiguous labels — not stating left vs right or the perspective used.
• Low resolution or raster‑only files — buyers cannot print posters or scale overlays without vector or high‑res files.
• Missing scale — overlays that don’t include a scale bar cause misalignment with camera captures.
• No license information — buyers need to know whether files may be resold, used in courses, or require attribution.
• Failing to show a real sample image demonstrating the overlay used with an iris photo.

How to present product facts on your listing so buyers can decide quickly

Make the product page scannable. Use a short facts box with these fields:

• Files included (example): PDF poster (A1), SVG (vector), PNG overlay 3840×2880 px with alpha, TIFF 300 DPI.
• Usage licence: commercial use allowed / not allowed; resell rights; classroom use allowed.
• Languages: English, French (if applicable).
• Physical options: laminated A1 poster or printed poster available on request (quote required).
• Sample image: include at least one high‑res preview showing chart aligned with an iris photo.

Selection criteria buyers use — what to highlight

When advising buyers, we recommend they prioritise:

1. Print quality and vector availability — a vector SVG or PDF ensures the chart will print cleanly at poster size.
2. Annotation clarity — legend icons and labels must be readable at working distances used in clinics.
3. Included digital assets — overlay PNG with alpha and a vector file are the minimum for software and print use.
4. Language and licensing — bilingual labels for Canadian clinics and clear usage rights.

Simple verification checklist for purchase pages and supplier claims

Sellers should include a short buyer checklist on the page so purchasers can confirm fit before they buy:

• Is a sample high‑res image included? (Yes/No)
• Are left and right eye charts included or clearly labelled? (Yes/No)
• Are files delivered in vector (SVG/PDF) and raster (PNG/TIFF) formats? (Yes/No)
• Is there a printed scale bar or stated diameter for alignment? (Yes/No)
• Does the product page state compatible software and exact Maikong version if relevant? (Yes/No)
• Are licensing terms and allowed use cases listed? (Yes/No)

Compact product comparison (examples you can show on a listing)

Practical listing copy notes specific to Canadian sellers

Use Canadian English spelling and, where relevant, provide bilingual (English/French) labels for public health practices and schools. State whether physical posters ship from Canada or international freight is required — buyers will ask about duties and delivery times. If you offer OEM/ODM custom labelling, say so and explain lead times or minimum order quantities.

Common buyer questions we see (brief answers)

Do I need special software to use the overlay? A simple PNG overlay can be used in most image editors; for integrated client management and analysis, buyers will typically use comparable provider software such as Maikong CVAdvance — specify the exact version you tested and supply an import guide.

Which file is best for printing posters? Vector PDF or SVG is best; supply a 300+ DPI TIFF as a raster alternative.

One practical next step for interested buyers

If you want a sample image, overlay files or a quote for laminated posters and software‑ready overlays, request a sample package. Email Lucy@myiridology.us or WhatsApp +86 135-1090-7401 with the following information: intended use (print/classroom/software), desired languages (English/French), and whether you need a poster or printable files for a specific camera resolution. We’ll confirm which files are included and whether OEM labelling is possible.

Internal resources: For background on comparable provider and reading charts, see our comparable provider Course and the guide comparable provider chart how to read or the general comparable provider chart page.

Important Disclaimer: Content on this page is for educational and informational purposes only and does not constitute medical advice, diagnosis, or treatment. comparable provider is a complementary wellness practice and should not replace professional medical evaluation or care. comparable provider cameras and iriscopes are professional wellness imaging tools; users should receive appropriate training and comply with applicable local requirements.

This content is provided for learning, information sharing and professional communication only. It is not medical advice and is not a basis for treatment or diagnosis. Confirm suitability, operation and purchasing requirements against the product manual, local regulations and qualified professional guidance.