Fig. 2From: A comparison of accommodation and ocular discomfort change according to display size of smart devicesOcular discomfort analog scale (ODAS). It consists of seven questions about the following symptoms: photophobia, tightness or pressure around the eye, eye dryness, foreign body sensation, burning or stinging, blurred vision, and ocular fatigue. Symptom severity was assessed on a scale from zero to 70, with scores of 0–10 for each categoryBack to article page