diff --git a/js/geometric-optics-basics-main.ts b/js/geometric-optics-basics-main.ts
index 8e1fd11..ab47eff 100644
--- a/js/geometric-optics-basics-main.ts
+++ b/js/geometric-optics-basics-main.ts
@@ -7,7 +7,6 @@
  */
 
 import GOConstants from '../../geometric-optics/js/common/GOConstants.js';
-import GOGlobalOptions from '../../geometric-optics/js/common/GOGlobalOptions.js';
 import LensScreen from '../../geometric-optics/js/lens/LensScreen.js';
 import MirrorScreen from '../../geometric-optics/js/mirror/MirrorScreen.js';
 import Sim from '../../joist/js/Sim.js';
@@ -15,9 +14,6 @@ import simLauncher from '../../joist/js/simLauncher.js';
 import Tandem from '../../tandem/js/Tandem.js';
 import geometricOpticsBasicsStrings from './geometricOpticsBasicsStrings.js';
 
-// ?focalLengthControl is ignored, and the 'direct' focal-length model is used.
-GOGlobalOptions.focalLengthControlTypeProperty.value = 'direct';
-
 const simOptions = {
 
   credits: GOConstants.CREDITS,