S4Optik Hand Held Cross Cylinder | The Foresight International Group
S4OptikHand Held Cross Cylinder is the tools that are used during the examination for the final fine-tuning of the axis and strength of astigmatism after its determination through retinoscopy, stellate cycle or automatic refractomertry. At The Foresight International Group the handheld cross cylinders are available in ±0.25, ±0.50, ±0.75, ±1.00 and ±2.00 powers. https://www.foresightintl.com/product/s4optik-hand-held-cross-cylinder/