diff --git a/src/openflexure_microscope_server/things/autofocus.py b/src/openflexure_microscope_server/things/autofocus.py
index a85b0d77..306a928c 100644
--- a/src/openflexure_microscope_server/things/autofocus.py
+++ b/src/openflexure_microscope_server/things/autofocus.py
@@ -253,22 +253,6 @@ class AutofocusThing(Thing):
                     stage.move_absolute(z=peak_height)
             return heights.tolist(), sizes.tolist()
 
-    @thing_action
-    def verify_focus_sharpness(
-        self, sweep_sizes: list, camera: WrappedCamera, threshold: float = 0.95
-    ):
-        """Take the sharpness curve of the autofocus, and the size of the current frame
-        to see if the autofocus completed successfully. Returns True if current sharpness
-        is within "leniency" number of frames from the peak of the autofocus"""
-
-        current_sharpness = camera.grab_jpeg_size(stream_name="lores")
-
-        peak = np.max(sweep_sizes)
-        base = np.min(sweep_sizes)
-        cutoff = threshold * (peak - base)
-
-        return current_sharpness >= base + cutoff
-
     @thing_property
     def stack_images_to_capture(self) -> int:
         """The number of images to capture and save in a stack