Experimental condition | Spontaneous blink rate, blinks/min Median (IQR) | % Incomplete blinks Median (IQR) |

Baseline: viewing picture at 2 m | 15.5 (16) | 14.5 (29.5) |

Tablet: reading at 45° angle at 40 cm | 6 (11) | 14.5 (28.5) |

PC: reading at 100% magnification at 60 cm | 6.5 (11) | 9 (20) |

PC: reading at 300% magnification at 60 cm | 11.5 (11) | 13.5 (25.8) |

Text: pasted on switched off display at 60 cm | 7 (12) | 0 (16.3) |

Text: on book rest at 45° angle at 40 cm | 5 (10) | 5 (22.8) |

Text: read aloud at 45° angle at 40 cm | 4 (9) | 0 (14.5) |