I understand that too much close reading will strain the ciliary muscles of the eyes. But what about small fonts? The contraction of the ciliary muscles is dependent on the distance not font size.

In other words, it is better to read from a closer monitor with bigger font or from a further monitor with smaller font?

  • $\begingroup$ I'm not sure if its the ciliary muscles so much as the orbicularis oculi, which brings the fatigue/strain on your eye based on this (eyemagazine.com/opinion/article/eye-strain) article, quoting many studies such as (J. E. Sheedy and J. Engle, ‘Is all asthenopia the same? Optometry and Vision Science, 79 (12s), p.03.) $\endgroup$ – Behzad Rowshanravan Dec 13 '14 at 16:52

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