Virtual JCC Refraction Simulator
Master the Jackson Cross Cylinder technique with our interactive simulator. Perfect for optometry students and practitioners looking to enhance their refraction skills.
Practice Mode
Realistic JCC simulation
Refine your skills with our virtual JCC simulator. Practice axis and power refinement with realistic patient responses following Indian Standard techniques.
About Indian Standard JCC
The Jackson Cross Cylinder (JCC) is an essential tool in subjective refraction, used to refine cylinder power and axis. The Indian Standard approach uses red and green dots or lines for orientation:
- RED indicators show PLUS power (+0.25D)
- GREEN indicators show MINUS power (-0.25D)
- For axis refinement, the JCC is positioned at 45° to the cylinder axis
- For power refinement, the JCC is aligned with the cylinder axis
Note: In actual JCC lenses, the indicators may be dots or lines, and colors may vary due to manufacturing. In this simulator, we use the standard red/green color scheme to indicate plus/minus power.