diff --git a/maintenance.py b/maintenance.py
index 8639aa4..55b874b 100644
--- a/maintenance.py
+++ b/maintenance.py
@@ -402,6 +402,7 @@ class Maintenance(Workflow, ModelSQL, ModelView):
 
                 if maintenance.equipment.product.resolution_type == "analoga":
                     calibrationLineTotal = CalibrationLineTotal(
+                        diopter=pattern,
                         dev_std=dev_std,
                         uncertain_type_A=uncertain_type_A,
                         uncertain_pattern=uncertain_pattern,
@@ -421,6 +422,7 @@ class Maintenance(Workflow, ModelSQL, ModelView):
 
                 elif maintenance.equipment.product.resolution_type == "digital":
                     calibrationLineTotal = CalibrationLineTotal(
+                        diopter=pattern,
                         dev_std=dev_std,
                         uncertain_type_A=uncertain_type_A,
                         uncertain_pattern=uncertain_pattern,
@@ -447,6 +449,7 @@ class Calibration(ModelSQL, ModelView):
     
     maintenance = fields.Many2One('optical_equipment.maintenance', "Maintenance", ondelete="CASCADE",
                                   select=True, required=True)
+    diopter = fields.Float("Diopter", states=_states) 
     dev_std = fields.Float("Standart Desviation", states=_states)
     uncertain_type_A = fields.Float("Uncertain Type A", states=_states)
     uncertain_pattern = fields.Float("Uncertain Pattern", states=_states)
diff --git a/view/calibration_total_form.xml b/view/calibration_total_form.xml
index c6511a3..93cb0dd 100644
--- a/view/calibration_total_form.xml
+++ b/view/calibration_total_form.xml
@@ -2,6 +2,8 @@
 <!-- This file is part of Tryton.  The COPYRIGHT file at the top level of
      this repository contains the full copyright notices and license terms. -->
 <form>
+    <label name="diopter"/>
+    <field name="diopter"/>
     <label name="dev_std"/>
     <field name="dev_std"/>
     <label name="uncertain_type_A"/>
diff --git a/view/calibration_total_tree.xml b/view/calibration_total_tree.xml
index 449facb..a81e938 100644
--- a/view/calibration_total_tree.xml
+++ b/view/calibration_total_tree.xml
@@ -2,6 +2,7 @@
 <!-- This file is part of Tryton.  The COPYRIGHT file at the top level of
      this repository contains the full copyright notices and license terms. -->
 <tree>
+    <field name="diopter" expand="1"/>	
     <field name="dev_std" expand="1"/>
     <field name="uncertain_type_A" expand="1"/>
     <field name="uncertain_pattern" expand="1"/>