This tool is for educational guidance only. It does not provide a diagnosis and cannot determine whether urgent assessment is needed. Written by a consultant ophthalmologist.
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PlainVision
Eye Health · Clearly Explained
Free Educational Tool

Vision Standards
Explainer

Enter your vision to see what it means in real life, for driving, and for legal standards.

Step One
Enter your visual acuity

Find this on any letter from your optician or ophthalmologist - written as a fraction such as 6/12 (UK) or 20/40 (US).

6 /
Enter the bottom number from your Snellen fraction (e.g. for 6/12, enter 12)
Your Vision Report
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UK Snellen
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US Snellen
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Decimal
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LogMAR
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01 What this means in daily life
02 UK Driving Standard
03 US Driving Guidance
04 UK Sight Impairment Registration
05 US Legal Blindness Definition
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This tool is for educational purposes only. It explains what visual acuity measurements typically mean and how they relate to published standards. It does not constitute medical or legal advice, does not account for visual field, contrast sensitivity, or other clinical factors, and cannot replace a formal assessment by a qualified clinician. Driving fitness is a legal matter - if you have any doubt about your vision and driving, consult your optometrist or ophthalmologist and notify the DVLA (UK) or your state DMV (US). Content reviewed by Chris Matthews, Consultant Ophthalmologist.