It's unlikely to be dangerous (see other answers), but "eye discomfort" is a bad yardstick: the retina doesn't have nociceptors and any discomfort would only be

It's unlikely to be dangerous (see other answers), but "eye discomfort" is a bad yardstick: the retina doesn't have nociceptors and any discomfort would only be secondary, appearing long after the damage is done. See (without being seen) the few people who manage to observe each solar eclipse with binoculars.