👁️✨ JACKSON CROSS CYLINDER (JCC) – THE KEY TO PRECISE ASTIGMATISM CORRECTION ✨👁️ Jackson Cross Cylinder (JCC) is a special optical lens used during subjective refraction to accurately refine cylindrical power and axis in patients with astigmatism. It plays a crucial role in providing clear, comfortable, and precise vision correction. 🔹 What is Jackson Cross Cylinder? 🔸 A lens combination of equal plus and minus cylindrical powers placed at 90° to each other 🔸 Commonly used power: ±0.25 D or
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