diff --git a/lib/dev_config.dart b/lib/dev_config.dart
index 3c91cd5..f0ebb81 100644
--- a/lib/dev_config.dart
+++ b/lib/dev_config.dart
@@ -16,7 +16,8 @@ const double kDirectionConeHalfAngle = 35.0; // degrees
 const double kDirectionConeBaseLength = 5; // multiplier
 const Color kDirectionConeColor = Color(0xD0767474); // FOV cone color
 const double kDirectionConeOpacity = 0.6; // Fill opacity for FOV cones
-const double kDirectionConeBorderWidth = 1.6 * MediaQuery.of(context).devicePixelRatio; // Border stroke width for FOV cones
+// Base values for thickness - use helper functions below for pixel-ratio scaling
+const double _kDirectionConeBorderWidthBase = 1.6;
 
 // Bottom button bar positioning
 const double kBottomButtonBarOffset = 4.0; // Distance from screen bottom (above safe area)
@@ -89,7 +90,7 @@ const int kAbsoluteMaxZoom = 23;
 
 // Node icon configuration
 const double kNodeIconDiameter = 18.0;
-const double kNodeRingThickness = 2.5 * MediaQuery.of(context).devicePixelRatio;
+const double _kNodeRingThicknessBase = 2.5;
 const double kNodeDotOpacity = 0.3; // Opacity for the grey dot interior
 const Color kNodeRingColorReal = Color(0xFF3036F0); // Real nodes from OSM - blue
 const Color kNodeRingColorMock = Color(0xD0FFFFFF); // Add node mock point - white
@@ -97,3 +98,12 @@ const Color kNodeRingColorPending = Color(0xD09C27B0); // Submitted/pending node
 const Color kNodeRingColorEditing = Color(0xD0FF9800); // Node being edited - orange
 const Color kNodeRingColorPendingEdit = Color(0xD0757575); // Original node with pending edit - grey
 const Color kNodeRingColorPendingDeletion = Color(0xC0F44336); // Node pending deletion - red, slightly transparent
+
+// Helper functions for pixel-ratio scaling
+double getDirectionConeBorderWidth(BuildContext context) {
+  return _kDirectionConeBorderWidthBase * MediaQuery.of(context).devicePixelRatio;
+}
+
+double getNodeRingThickness(BuildContext context) {
+  return _kNodeRingThicknessBase * MediaQuery.of(context).devicePixelRatio;
+}
diff --git a/lib/widgets/camera_icon.dart b/lib/widgets/camera_icon.dart
index 46e2578..4fa015a 100644
--- a/lib/widgets/camera_icon.dart
+++ b/lib/widgets/camera_icon.dart
@@ -43,7 +43,7 @@ class CameraIcon extends StatelessWidget {
         color: _ringColor.withOpacity(kNodeDotOpacity),
         border: Border.all(
           color: _ringColor,
-          width: kNodeRingThickness,
+          width: getNodeRingThickness(context),
         ),
       ),
     );
diff --git a/lib/widgets/map/direction_cones.dart b/lib/widgets/map/direction_cones.dart
index c715847..2c58424 100644
--- a/lib/widgets/map/direction_cones.dart
+++ b/lib/widgets/map/direction_cones.dart
@@ -14,6 +14,7 @@ class DirectionConesBuilder {
     required double zoom,
     AddNodeSession? session,
     EditNodeSession? editSession,
+    required BuildContext context,
   }) {
     final overlays = <Polygon>[];
     
@@ -23,6 +24,7 @@ class DirectionConesBuilder {
         session.target!, 
         session.directionDegrees, 
         zoom,
+        context: context,
         isSession: true,
       ));
     }
@@ -33,6 +35,7 @@ class DirectionConesBuilder {
         editSession.target, 
         editSession.directionDegrees, 
         zoom,
+        context: context,
         isSession: true,
       ));
     }
@@ -46,6 +49,7 @@ class DirectionConesBuilder {
           n.coord, 
           n.directionDeg!, 
           zoom,
+          context: context,
         ))
     );
     
@@ -69,6 +73,7 @@ class DirectionConesBuilder {
     LatLng origin, 
     double bearingDeg, 
     double zoom, {
+    required BuildContext context,
     bool isPending = false,
     bool isSession = false,
   }) {
@@ -76,7 +81,7 @@ class DirectionConesBuilder {
     
     // Calculate pixel-based radii
     final outerRadiusPx = kNodeIconDiameter + (kNodeIconDiameter * kDirectionConeBaseLength);
-    final innerRadiusPx = kNodeIconDiameter + (2 * kNodeRingThickness);
+    final innerRadiusPx = kNodeIconDiameter + (2 * getNodeRingThickness(context));
     
     // Convert pixels to coordinate distances with zoom scaling
     final pixelToCoordinate = 0.00001 * math.pow(2, 15 - zoom);
@@ -113,7 +118,7 @@ class DirectionConesBuilder {
       points: points,
       color: kDirectionConeColor.withOpacity(kDirectionConeOpacity),
       borderColor: kDirectionConeColor,
-      borderStrokeWidth: kDirectionConeBorderWidth,
+      borderStrokeWidth: getDirectionConeBorderWidth(context),
     );
   }
 }
\ No newline at end of file
diff --git a/lib/widgets/map_view.dart b/lib/widgets/map_view.dart
index 6cf737f..3aad009 100644
--- a/lib/widgets/map_view.dart
+++ b/lib/widgets/map_view.dart
@@ -409,6 +409,7 @@ class MapViewState extends State<MapView> {
           zoom: currentZoom,
           session: session,
           editSession: editSession,
+          context: context,
         );
 
         // Add suspected location bounds if one is selected