Blur Zoning
Edging

Step 1.  Follow edges of object inside "blur zone".
Step 2.  Repeat with different blurred object.
Step 3. Blink; try Fast and Squeeze Blinking.

Centering

Step 1.  Follow edges of object inside "blur zone".
Step 2.  Go to smallest detail, run eyes around edge.
Step 3.  Try to see smaller details.
Step 4. Blink; try Fast and Squeeze Blinking.