The cornea is the clear front part of the eye that transmits light.
VOA: special.2009.03.30
His typical routine would be to wake up at noon, work from 2pm to 10pm, have dinner then go on a bike ride in the still-clear light, returning at 1am for a little dessert.
Most of the latter had come from London, drawn, as were Walter Sickert and James McNeill Whistler through several winters in the 1880s, by the vivid and naturalistic subject matter and the preternaturally clearlight.
Impressionists favor the clearlight of midafternoon, and instead of focusing on panoramic views, they concentrate on the quality of natural light reflected on specific surfaces a single copse of trees, a short span of running river, a group of village houses and rooftops.