Evidence-Based Vision Science

Vision Calibrator

Personalized editor settings based on peer-reviewed research. Whether you have myopia, astigmatism, or color vision deficiency, get recommendations backed by actual vision science — not guesswork.

Visual Conditions

Color Vision

Prescription (optional)

Right Eye (OD)
Left Eye (OS)

Current Settings (baseline)

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Target Editor

Select Conditions

Choose your visual conditions and optionally enter your prescription for more accurate recommendations.

Choose Your Editor

Get config for VS Code, Zed, Neovim, JetBrains, or Sublime Text. Same research, different formats.

See The Research

Every recommendation includes citations. Know exactly why each setting is suggested.

Key Research Findings

16px+
Minimum font size for PC monitors to maintain >33cm viewing distancePeking University / Wenzhou Medical University, 2023
3:1
Acuity reserve ratio for maximum reading speed (text 3× your threshold)Vision science research on critical print size
1.5×
Line height where reading speed peaks and eye strain reducesNielsen Norman Group / Journal of Experimental Psychology
0.5D
Even this small uncorrected astigmatism increases digital eye strainMultiple studies on computer vision syndrome

Conditions Explained

Myopia & Hyperopia

Refractive errors affect how your eyes focus. Myopia (nearsightedness) benefits from larger fonts and block cursors. Research shows smaller text causes closer viewing distances, increasing eye strain.

〰️Astigmatism

Causes directional blur that makes similar letters hard to distinguish (c/e, r/n, 0/O). Research shows the blur effect depends on your axis orientation. Fonts with clear letterforms help more than adding letter spacing to monospace fonts.

🎨Color Vision Deficiency

Affects ~8% of men. Red-green (deuteranopia/protanopia) is most common. The tool recommends themes that use your intact color channels — blue/yellow for red-green CVD, red/green for tritanopia.

😫Digital Eye Strain

Larger fonts reduce accommodation lag — the delay between where your eye focuses and where it needs to focus. A 2024 study confirmed this is a primary cause of eye strain symptoms.

Disclaimer: This tool provides comfort recommendations based on vision research, not medical advice. If you experience persistent eye strain or vision problems, please consult an optometrist or ophthalmologist.