Ophthalmologists and Contact-Lens Prescriptions

Contact lens prescription Japan starts at an ophthalmology clinic, not at the glasses counter.¹² The eye doctor checks suitability, runs a trial fitting, and issues the lens data that retailers work from. Get that slip first and the rest is shopping.

Confirm current details with official sources

Procedures, fees, and requirements can change. Confirm current details at the Ministry of Health, Labour and Welfare site. This article is general information, not medical advice; for your specific case, consult a licensed ophthalmologist.

Overview

An 眼科 (ganka, "ophthalmology; eye clinic") is the medical clinic for eyes, and its doctor handles contact-lens fittings as medical care.¹² An optical shop sells glasses and lenses; it does not replace the clinic for a first fitting. First-time contact-lens users are directed to get an eye-doctor exam before buying anything.¹²

This path works the same way nationwide. No ward office and no nationality rule changes it; only individual clinics differ in booking, English support, and trial-lens stock.

Ganka vs optical shop

Use the clinic when you need a retailer-ready contact-lens prescription, a first fitting, or any eye-health check.² Use the optical shop when you already hold current prescription data and simply need to buy. The two stops complement each other rather than competing.

Why Retailers Ask for a Prescription

Sellers ask for prescription data because contact lenses sit directly on the eye. LensMode, a major online seller, calls contact lenses highly controlled medical devices and states that purchases should be based on an eye-doctor prescription with regular eye-doctor checks.³

What the prescription covers

The slip carries lens parameters, not glasses values. Orders need DIA (lens diameter), PWR (power), and BC (base curve) at minimum.¹ Toric lenses for astigmatism add CYL and AXIS, while multifocal lenses add ADD.¹

If you already wear lenses, the data sits printed on your current lens box or case.¹ Check there before reordering. A glasses prescription alone cannot fill these fields because it lacks the contact-specific curves and diameters (limitation: non-substitutability inferred from the parameter list rather than a line stating it).¹

First-Time Fitting Process

The fitting runs as a short sequence at the clinic: exam, trial lenses, then a follow-up check confirming fit and comfort before the final data is settled (limitation: exam-plus-instruction verified; trial mechanics follow standard clinic practice).² The diagram below shows the order.

Eye exam at the ophthalmology clinic

Before buying lenses, the eye doctor examines your eyes, checks suitability for contact-lens wear, determines appropriate lenses, and gives wearing instruction.² Bring your insurance proof to reception, since the visit runs as insured treatment on presentation of a registered My Number Card or Eligibility Confirmation Form.⁴

Bring the current box or case to the first visit

The printed DIA, PWR, and BC values on your lens box or case give the clinic your starting point and later fill the online order form.¹ Arriving without them adds a measurement round trip.

Trial lenses and follow-up

After the exam you receive trial lenses and return for a follow-up that confirms fit and comfort.² Only then is the data final for retailer use. If anything feels wrong between visits, seek an eye-doctor check promptly rather than waiting for the scheduled date.²

Insurance Coverage and Costs

The money split is simple: the clinic visit is medical care and runs through insurance, while the lenses themselves are retail goods you buy out of pocket.⁴¹

What insurance covers

The eye exam and fitting check at the clinic are insured treatment when you present valid insurance proof.⁴⁵ Public insurance structure applies uniformly at medical institutions nationwide (as of 2026-09-07; confirm current figures with the Ministry of Health, Labour and Welfare).⁵

What you pay yourself

The contact lenses themselves carry no insurance billing at the retailer. Published seller prices are private-pay retail prices with no insurance mechanism involved.¹³

The table below shows LensMode personal-import order caps as one dated example. Caps below describe that seller's import model, not a rule about every shop (as of 2026-09-07; confirm current caps with the seller).¹

Item	Amount	As of	Notes
Consumption tax in base case	¥0	2026-09-071	Customs inspection can rarely add tax at buyer cost (as of 2026-09-07)
Quantity cap, 1-day disposables	4 boxes per order	2026-09-071	Per-order personal-import cap
Quantity cap, 2-week type	2 boxes per order	2026-09-071	Per-order personal-import cap

Renewal Pattern

Prescriptions expire, so ongoing wearers repeat the clinic loop. Retailers re-ask for current data each cycle.

Every 6 to 12 months

Renew the prescription slip about every 6 to 12 months, and expect sellers to re-ask at that rhythm (as of 2026-09-07; confirm current validity with the clinic or seller).² This slip-validity rhythm differs from the eye-health check rhythm below, so do not confuse the two.

Eye-health checks run more often. LensMode guides buyers to regular checks about once every 3 months, and stresses that checks stay necessary even when wear feels fine because damage can progress without symptoms (as of 2026-09-07).² Any abnormality calls for an immediate eye-doctor visit.²

Where to Buy Contact Lenses

With current prescription data in hand, buyers choose between counters and screens. Both channels sell the same categories: 1-day, 2-week, toric, and multifocal lenses.¹

In-store at optical shops

Buy in person at an optical-shop counter by presenting the prescription data from the clinic. Counter staff match the slip values to stock on the shelf. This channel suits buyers who want same-day pickup or face-to-face confirmation.

Online ordering

Order online by entering the DIA, PWR, and BC values from the existing box or prescription slip, plus extra parameters for toric or multifocal types.¹ LensMode, one verified online seller, ships from Singapore stock with average delivery around 7 days and shortest delivery of 3 to 4 days (as of 2026-09-07; confirm current figures with the seller).¹

Confirm the seller model before assuming a slip check

Domestic sellers typically ask for the slip itself, while personal-import sellers may not collect it at checkout yet still instruct buyers to hold a current eye-doctor exam behind the order (limitation: domestic half follows scope pattern; personal-import half verified).¹² Read the seller help page before ordering.

Good to know

A glasses prescription is not a contact-lens prescription

Spectacle values and contact-lens data use different parameters. Contacts need BC and DIA alongside power, so a glasses slip alone leaves the order form incomplete.¹ Keep both slips and never substitute one for the other.

Bring your current lenses and glasses case to the first visit

Bring the lens box or case plus your glasses to the first visit. The printed values give the clinic your starting point, and the doctor confirms suitability before any switch to a different product.¹² Reorder from printed values rather than brand memory.

Online orders still need a valid prescription slip

Online order forms ask for the same DIA, PWR, and BC values the clinic issues, so an expired slip means a repeat visit before reordering.¹ Personal-import sellers may not collect the slip at checkout, yet they still instruct buyers to hold a current eye-doctor exam behind the order.¹² Plan refills before the slip lapses, since per-order caps such as 4 boxes for 1-day types apply on top (as of 2026-09-07).¹

Book ahead when you need English support

English availability varies by individual clinic and retailer counter, not by a national rule (limitation: facility-variation pattern consistent with pillar scope; no clinic language page fetched in this pass). Call or check the site ahead where language matters. Bringing a written note of symptoms and current lens data helps anywhere.

See also

• What to Bring to a Doctor's Visit
• Booking a Doctor in Japan
• Specialty Department Signs: Reading Japan Clinic Placards
• Clinic vs. Hospital: The Two-Tier System
• Eye Exams: The Optical-Shop Default
• Vision Correction Surgery: LASIK and ICL

References

Footnotes

1. LENSMODE (LENS MODE PTE,LTD). 「初めてご利用になる方へ」 (First-time buyer's guide). https://www.lensmode.com/howto/first/ ↩ ↩² ↩³ ↩⁴ ↩⁵ ↩⁶ ↩⁷ ↩⁸ ↩⁹ ↩¹⁰ ↩¹¹ ↩¹² ↩¹³ ↩¹⁴ ↩¹⁵ ↩¹⁶ ↩¹⁷ ↩¹⁸ ↩¹⁹ ↩²⁰ ↩²¹ ↩²² ↩²³

2. LENSMODE (LENS MODE PTE,LTD). 「よくある質問: その他」 (FAQ: prescriptions, exams, regular checks). https://www.lensmode.com/faq/qa11/ ↩ ↩² ↩³ ↩⁴ ↩⁵ ↩⁶ ↩⁷ ↩⁸ ↩⁹ ↩¹⁰ ↩¹¹ ↩¹² ↩¹³ ↩¹⁴

3. LENSMODE (LENS MODE PTE,LTD). Top page and site footer notice. https://www.lensmode.com/ ↩ ↩²

4. Digital Agency. "Use of health insurance card in My Number Card." Updated 2026-02-19. https://www.digital.go.jp/en/policies/mynumber/insurance-card ↩ ↩² ↩³

5. Ministry of Health, Labour and Welfare (MHLW). 「医療保険」 (Medical insurance policy hub). https://www.mhlw.go.jp/stf/seisakunitsuite/bunya/kenkou_iryou/iryouhoken/index.html ↩ ↩²