FEYENALLY
Techstars '25Wilmington, US · Founded 2021 · 12 employees on LinkedIn · 2 known investors
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Feyenally provides AI-powered eye testing through smartphone photos, generating refractive error measurements (spherical, cylindrical, and axis values) instantly from home without additional hardware. The company serves individuals seeking vision prescriptions and eye care accessibility.
Also known as eyeTEST · Feyenally
Founders & leadership
FEYENALLY was founded in 2021 by Piotr Kruszynski.

Investors · 2
How we know: Aligo Venture Capital's portfolio page · a partner's Signal profile · Not right? Tell us
How we know: the Techstars portfolio · open dataset · Top 3000 Accelerator Startups (no YC) 2026-08 · Not right? Tell us
Company profile
researched Sep 2026Feyenally develops eyeTEST, a smartphone application that performs self-administered refractive error examinations. The user answers a short questionnaire about age and history, then takes AI-guided photographs of their eyes using the phone camera and flash; the system returns refractive measurements — spherical (SPH), cylindrical (CYL) and axis (AX) values — within seconds, with the company describing a complete test as taking about two minutes. No additional hardware or attachments are required.
The company positions the product against conventional eye examinations, which it characterizes as subjective, dependent on specialized equipment, and constrained by specialist availability. Feyenally describes its approach as objective testing based on neural networks, and states the technology has been validated in independent studies and is GDPR compliant. The company presents itself as a digital optometrist serving people seeking accessible basic eye care and vision prescriptions.
Traction
The company cites participation in Techstars Healthcare Demo Day, Health Tech Challengers and the Santander X Global Challenge, and press coverage in Forbes, Technical.ly and Spider's Web.
Latest developments
The company's site highlights U.S. patent US 12,664,654 covering its technology and lists demo-day and challenge appearances including Techstars Healthcare Demo Day, Health Tech Challengers and the Santander X Global Challenge.
▸Full profile — market position, technology, go-to-market
Market position
Feyenally describes eyeTEST as the first and only solution providing objective refractive testing using only a smartphone, contrasting it with clinic-based examinations that rely on specialized equipment and subjective patient responses.
Differentiators stated by the company are objective, neural-network-based measurement rather than subjective patient response; operation on an unmodified smartphone without dedicated hardware; results delivered in seconds; patent protection in the U.S. and EU; and medical validation through independent studies.
Technology
The product uses neural network models applied to photographs of the eye captured with a standard smartphone camera and flash, guided by in-app AI instructions, to produce objective refractive error measurements (spherical, cylindrical, axis). The company cites U.S. patent protection (US 12,664,654) and states that its AI algorithms are patented in the United States and the European Union. It also states the technology has been validated in independent studies and that data handling is GDPR compliant.
Go-to-market
Feyenally distributes eyeTEST as a consumer-facing smartphone app and also works through partner organizations, supported by accelerator and competition visibility (Techstars, Health Tech Challengers, Santander X Global Challenge) and press coverage.
Individuals seeking basic eye testing and vision prescriptions outside of clinical settings, including those facing long wait times, travel requirements or limited access to eye care specialists; the company also references partner organizations.
Compiled by commissioned research from 3 cited public sources — announcements, filings, and press listed under research sources below.
Key figures
latest reportedCompany-reported or press-reported figures, each dated to when it was claimed — not independently audited.
Related companies · 1
Companies working in the same space as FEYENALLY.
Timeline · 3
launches, deals, and filingsFeyenally features videos from the Santander X Global Challenge and Health Tech Challengers programs.
The company lists a Techstars Demo Day appearance among its featured videos and press coverage, including a Technical.ly article on Techstars Healthcare Demo Day.
Feyenally states its AI-driven smartphone eye testing technology is protected by U.S. patent US 12,664,654, with patented AI algorithms in the U.S. and EU.
Dated company events from announcements, filings, and press; legal rows summarize public dockets and regulator releases.
▸Research sources · 3
primary sources listed
- FEYENALLYfeyenally.com · web
3 public sources were cited for this profile; the first-party ones are listed here.
Frequently asked questions
- What does FEYENALLY do?
- Feyenally offers eyeTEST, a patented AI smartphone app that measures refractive errors at home without extra hardware.
- Who founded FEYENALLY?
- FEYENALLY was founded by Piotr Kruszynski in 2021.
- Who are FEYENALLY's investors?
- FEYENALLY's investors include Aligo Venture Capital, Techstars.
- Where is FEYENALLY headquartered?
- FEYENALLY is headquartered in Wilmington, US.



