Due to poor air quality, the Academy San Francisco offices will be closed Friday, Nov. 16. 

  • Illustration developed by Edmond H. Thall, MD, and Kevin M. Miller, MD, and rendered by C. H. Wooley.
    File Size: 24 KB
    Related: Magnification, Optics
    Refractive Mgmt/Intervention

    Object height (O) and image height (I) may be measured from any pair of off-axis conjugate points.