Due to poor air quality related to fires in California, the Academy’s San Francisco offices will be closed Friday, Nov. 16. Member support staff will not be available by phone and responses to emails may be delayed.

  • Illustration by Mark M. Miller
    File Size: 36 KB
    Cornea/External Disease

    The needle enters the cornea perpendicularly (A), and the pass follows the curvature of the needle (B).