diff --git a/pixelocr/page.py b/pixelocr/page.py
index 72037a3..5c280fd 100644
--- a/pixelocr/page.py
+++ b/pixelocr/page.py
@@ -130,22 +130,6 @@ class Line(PageObject):
         glyphs = self._combine_diacritics(glyphs)
         return self._insert_spaces(glyphs)
 
-    def _optical_correction(self, glyph1, glyph2):
-        base = min(glyph1.top, glyph2.top)
-        height = max(glyph1.bottom, glyph2.bottom) - base
-        bitmap1 = np.hstack([np.ones((glyph1.height, 1)), glyph1.image.bitmap])
-        bitmap2 = np.hstack([glyph2.image.bitmap, np.ones((glyph2.height, 1))])
-
-        margin1 = np.zeros(height, np.int)
-        margin1.fill(glyph1.width)
-        margin2 = np.zeros(height, np.int)
-        margin2.fill(glyph2.width)
-
-        margin1[glyph1.top - base: glyph1.bottom - base] = np.fliplr(bitmap1).argmax(axis=1)
-        margin2[glyph2.top - base: glyph2.bottom - base] = bitmap2.argmax(axis=1)
-        margins = margin1 + margin2
-        return margins.min()
-
     def _combine_diacritics(self, glyphs):
         def find_correspondence(glyphs):
             bodies = defaultdict(list)
@@ -171,8 +155,7 @@ class Line(PageObject):
         for glyph, next_glyph in pairwise(glyphs):
             yield glyph
             if next_glyph is not None:
-                correction = self._optical_correction(glyph, next_glyph)
-                distance = next_glyph.left - glyph.right + correction
+                distance = glyph.optical_distance(next_glyph)
                 if distance > 5:
                     yield Space(self.image.space(glyph.right, self.top, distance, self.height), self.baseline - self.top)
 
@@ -198,6 +181,28 @@ class Glyph(PageObject):
         """Return True if the glyph is definitely not diacritic."""
         return self.height >= self.MIN_BODY_HEIGHT
 
+    def _optical_correction(self, other):
+        glyph1 = self
+        glyph2 = other
+        base = min(glyph1.top, glyph2.top)
+        height = max(glyph1.bottom, glyph2.bottom) - base
+        bitmap1 = np.hstack([np.ones((glyph1.height, 1)), glyph1.image.bitmap])
+        bitmap2 = np.hstack([glyph2.image.bitmap, np.ones((glyph2.height, 1))])
+
+        margin1 = np.zeros(height, np.int)
+        margin1.fill(glyph1.width)
+        margin2 = np.zeros(height, np.int)
+        margin2.fill(glyph2.width)
+
+        margin1[glyph1.top - base: glyph1.bottom - base] = np.fliplr(bitmap1).argmax(axis=1)
+        margin2[glyph2.top - base: glyph2.bottom - base] = bitmap2.argmax(axis=1)
+        margins = margin1 + margin2
+        return margins.min()
+
+    def optical_distance(self, other):
+        distance = other.left - self.right
+        return distance + self._optical_correction(other)
+
     def detect_diacritic(self, glyph):
         """Check if the given glyph can be our diacritic and return a numeric score."""