Desk view — top down
Curvature comfort — focal asymmetry vs distance
Lines · head movement · curvature · ground truth: ~125 lines at 55cm on 45" LG
Pick a screen, set your font size and distance. The tool shows how many lines fit, whether those lines are comfortable to read, and what trade-offs the screen forces.
Lines — how many lines of code fit vertically. Depends on font size and physical screen height. More pixels don't add lines at the same font — they sharpen rendering.
Arcmin — how big text looks to your eye. Same font on a higher-PPI screen = smaller text = lower arcmin.
Head movement — wider screens = more head rotation at the same distance.
PPD — pixels per degree at your eye. Tier lines show where each resolution crosses the text-sharp threshold.
Curvature — equalises focal distance (does NOT reduce head movement).
80cm RPA — eyes' natural rest distance.
Resolution value — when each tier is worth paying for. Green = visible benefit, yellow = lower tier would suffice, red = wasted pixels.
Width = panes — ultrawide adds horizontal space for tiling, not vertical lines. · Right-click cards to compare up to 3 screens.
Each curve = one screen at your fixed font. Where a curve drops below a threshold line, that screen strains at that distance.