diff --git a/opencsp/app/sofast/lib/ParamsOpticGeometry.py b/opencsp/app/sofast/lib/ParamsOpticGeometry.py
index 62bdf656..953ab00f 100644
--- a/opencsp/app/sofast/lib/ParamsOpticGeometry.py
+++ b/opencsp/app/sofast/lib/ParamsOpticGeometry.py
@@ -8,13 +8,17 @@ class ParamsOpticGeometry(hdf5_tools.HDF5_IO_Abstract):
     """Parameter dataclass for processing optic geometry"""
 
     perimeter_refine_axial_search_dist: float = 50.0
-    """The length of the search box (along the search direction) to use when finding optic perimeter. Default 50.0"""
+    """The length of the search box (along the search direction) to use when finding optic
+    perimeter. Units pixels. Default 50.0"""
     perimeter_refine_perpendicular_search_dist: float = 50.0
-    """The half-width of the search box (perpendicular to the search direction) to use when finding optic perimeter. Default 50.0"""
+    """The half-width of the search box (perpendicular to the search direction) to use when finding
+    optic perimeter. Units pixels. Default 50.0"""
     facet_corns_refine_step_length: float = 10.0
-    """The length of the search box (along the search direction) to use when refining facet corner locations (when processing a facet ensemble). Default 10.0"""
+    """The length of the search box (along the search direction) to use when refining facet corner
+    locations (when processing a facet ensemble). Units pixels. Default 10.0"""
     facet_corns_refine_perpendicular_search_dist: float = 10.0
-    """The half-width of the search box (perpendicular to the search direction) to use when refining facet corner locations (when processing a facet ensemble). Default 10.0"""
+    """The half-width of the search box (perpendicular to the search direction) to use when
+    refining facet corner locations (when processing a facet ensemble). Units pixels. Default 10.0"""
     facet_corns_refine_frac_keep: float = 0.5
     """The fraction of pixels to consider within search box when finding optic edges. Default 0.5"""