Citing unnamed officials with knowledge of the investigation, The New York Times reports that the man believed to have intentionally crashed a Germanwings plane earlier this week sought medical treatment for vision problems.

Like previously rumored mental health problems—which the newspaper's sources also confirmed—it appears that Germanwings pilot Andreas Lubitz tried to hide the eye condition from his employer.

From the Times:

It is not clear how severe his eye problems were or how they might have been related to his psychological condition. One person with knowledge of the investigation said the authorities had not ruled out the possibility that the vision problem could have been psychosomatic.