Sight Calculator is an independent, self-funded website built around one goal: helping people pay closer attention to their eyesight between professional checkups. We publish a free at-home visual acuity screening tool alongside plain-language articles on eye health, written and edited by our small team.
What We Do
Our interactive screening tool gives you a quick, casual read on your near-vision acuity using your own screen. It's built to be simple, private, and free — nothing you enter is sent to a server. Alongside the tool, our editorial team researches and writes articles on topics like common eye diseases, warning signs that warrant urgent care, nutrition, screen ergonomics, and children's vision, drawing on publicly available guidance from recognized health organizations.
Our Editorial Process
Every article on this site is written by the Sight Calculator editorial team and checked against publicly published guidance from established eye-health organizations, such as the National Eye Institute, the American Academy of Ophthalmology, and the American Optometric Association. We link to relevant sources at the end of each article so you can dig deeper or verify anything we say. We are not a medical practice, and nothing on this site is written or reviewed by a licensed clinician on staff — it is general educational content, not personalized medical advice. Articles are updated periodically as our understanding improves or sources change.
What We're Not
- We are not a medical provider, clinic, or diagnostic service.
- Our screening tool cannot diagnose any eye condition and is not a substitute for a comprehensive eye exam.
- Nothing on this site should be treated as personalized medical advice — for that, please see a licensed optometrist or ophthalmologist.
For the full picture, please also read our Terms & Services and Privacy Policy.
Get in Touch
Spotted an error, have a correction to suggest, or just want to say hello? We'd like to hear from you. Reach us by email at hello@sightcalculator.com. We read every message and do our best to respond within a few business days. Please note we can't provide individual medical advice by email — for that, a licensed eye care professional is the right person to ask.
This page describes general site information and is provided for transparency. It is not a substitute for professional medical advice, diagnosis, or treatment. If you are experiencing significant vision difficulty, we strongly recommend visiting a licensed ophthalmologist or optometrist.