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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint745,887 companies indexed · Last updated: today
DirectoryHealthcareOphthalmology ClinicsZurichELZA Institute AG
ELZA Institute AG Logo
Verified· 3 sourcesTrust Score
Summary

About the company

The ELZA Institute is a medical institute specializing in ophthalmology, particularly in eye laser surgery. The company's core activity includes performing eye surgeries such as LASIK, TransPRK, and refractive lens surgery, as well as treating vision disorders and correcting vision impairments. The institute also provides consulting and treatment for patients with eye problems and conducts research and development in the field of ophthalmology.

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ELZA Institute AG

Industry:Ophthalmology Clinics
✓ Offered8
Laser Eye Surgery
Laser eye surgery with Femto-LASIK, TransPRK and KLex (SMILE, CLEAR, SmartSight) to correct myopia, hyperopia and astigmatism; also therapeutic correction after complications.
Keratoconus Treatment
Keratoconus diagnosis and treatment with cross-linking, ELZA-PACE, Femto-CAIRS, Femto-ICRS and wavefront-guided transPRK; also follow-up monitoring and screening in children.
Corneal Surgery
Corneal surgery with pterygium removal, Salzmann degeneration treatment, Terrien marginal degeneration care, infectious keratitis, corneal transplantation and scar correction.
Cataract Surgery
Cataract surgery with manual or femtosecond laser-assisted procedures plus selection and implantation of monofocal, multifocal, EDOF and toric intraocular lenses.
Eyelid Surgery
Eyelid surgery for dermatochalasis, brow ptosis, entropion, ectropion, ptosis, facial palsy and malignant eyelid tumours with reconstruction.
Orbital Surgery
Orbital surgery with orbital decompression for Graves’ disease, treatment of orbital tumours, artificial eyes, and enucleation and evisceration.
Dry Eye Treatment
Dry eye diagnosis and therapy with meibography, tear meniscus analysis, BlephEx lid-margin cleaning, IPL and LLLT treatment.
Retina Treatment
Retina treatment with evaluation and therapy of AMD, vitreous detachment, macular hole, retinal detachment and intravitreal injections.
Trust & reputation

ranQ Trust Score of ELZA Institute AG: 4.5 out of 5.0

Trust Score4.5/ 5.0

Excellent

x

Data basis 96% · As of October 2026

ELZA Institute AG scores 86.0 out of 100 points in the Reputation area of the ranQ Trust Score. This area carries 42% of the weighting.
x
CriterionValueWeight
  • Review quality: The average rating across all connected sources, smoothed against the industry mean. So 5.0 stars from three reviews do not outrank 4.7 from three hundred.80.224%
  • Review volume: The number of reviews across all sources. The scale is logarithmic: the first reviews count the most, and the maximum is reached at 50 reviews.88.910%
  • Review recency: The age of the most recent review. Two-year-old reviews deliberately sit in the middle, because that is normal for Swiss SMEs. Only after three years without a new voice does the value drop markedly.100.08%
ELZA Institute AG scores 89.1 out of 100 points in the Substance area of the ranQ Trust Score. This area carries 28% of the weighting.
x
CriterionValueWeight
  • Establishment: Years since founding or brand launch, logarithmic. The maximum is reached at 15 years.92.512%
  • Company size: The headcount band, researched by ranQ or stated by the company. It is scored in steps rather than by head count, because the data only provides bands.82.07%
ELZA Institute AG scores 85.0 out of 100 points in the Identity area of the ranQ Trust Score. This area carries 22% of the weighting.
x
CriterionValueWeight
  • Verification: Official register entry (commercial register with UID or professional-body record, 55 points), confirmed domain (20 points) and confirmed ranQ profile (up to 25 points, depending on completeness).85.022%
ELZA Institute AG scores 82.9 out of 100 points in the Visibility area of the ranQ Trust Score. This area carries 8% of the weighting.
x
CriterionValueWeight
  • Website authority: Ahrefs' Domain Rating measures, on a scale of 0 to 100, how strongly a website is linked from other websites. For Swiss SMEs the range up to 40 is typical; the maximum is reached at 35.82.94%
  • Media authority: No data point — the criterion is taken out of the weighting and does not lower the score.—4%
Qualifications+0.00

ELZA Institute AG reaches a ranQ Trust Score of 4.5 out of 5.0 — rated «Excellent». The rating draws, among other things, on 4.7 out of 5 stars from 32 customer reviews. The data basis is 96%, so the score is backed by part of the criteria. As of October 2026.

The Trust Score cannot be bought and is calculated from publicly verifiable data.

Reviews

Aggregated rating

Aggregated rating
4.7
of 5

Aggregated from 32 reviews across all connected sources

Sources
GGoogle4.732
★TrustpilotSoon
PProvenExpertSoon

Further sources are added continuously and factored into the ranQ Rating.

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Location

Bahnhofplatz 15
8001 Zurich
Opening hours
Mon
09:00 - 13:00, 14:00 - 18:00
Tue
08:00 - 12:00, 13:00 - 17:00
Wed
08:00 - 12:00, 13:00 - 17:00
Thu
09:00 - 13:00, 14:00 - 18:00
Fri
08:00 - 12:00, 13:00 - 17:00
Sat
Closed
Sun
Closed

At a glance

Legal form
Corporation
UID
CHE-167.307.975
Founded
2014 · 12 years
Last commercial register change
July 24, 2025
Employees
21 to 50
Legal form: Graded by liability and disclosure. The weight is kept small: a sole proprietorship is not a dubious company, it is just liable differently.
100.0
6%
  • Branch offices: Branch offices linked in the commercial register. Having none is normal and costs no points.70.03%
    • Full methodology

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