The S4OPTIK SL-Y100 minus cylinder vision tester features synchronized cross cylinders, fully coated lenses, a full refraction range from -19.00D to +16.75D in sphere and to -8.00D cylinder (with accessory lens), and a full complement of auxiliary lenses. It’s comfortable feel and smooth operation will allow fast and easy refractions.
Features
- Minus Cylinder
 - Coated Lenses
 - Synchronized Cross Cylinders
 - Comfortable Feel & Smooth Operation
 - Synced cross cylinders with / fully coats lenses
 - Refractor rang from -19.00D to +16.75D in sphere and to –8.00D cylinders (with accessory
lenses) - Full set of auxiliary lenses
 
Additional Information
Sphere 
-19.00 to +16.75 D (increments of 0.25 D, being 0.12 D when 0.12 D auxiliary lens is used)
Cylinder 
0.00 to -6.00 D, being 0 to -8.00 D with auxiliary lens (increments of 0.25 D, being 0.12 D when 0.12 D auxiliary lens is used)
Axis 
0 to 180 degrees (increments of 5 degrees)
Prism 
0 to 20 (increments of 1)
Cross Cylinder Lens 
+/- 0.25 D
PD Measurement 
50 to 75mm (increments of 1mm)
Convergence 
Infinity to 380mm (when PD is 64mm)
Forehead Rest Adjustment Range 
16mm
Vertex Distance 
13.75mm
Dimensions 
13.2″ (W) x 12.6″ (D) x 3.5″ (H) / 335mm (W) x 320mm (D) x 90mm (H)
Weight 
9.9 lbs / 4.5 kg
Standard Accessories 
Near point rod, near point card, card holder, dust cover, accessory box, face shield, balloon with brush, additional lenses (two -0.12 D and -2.00 D cylinder lenses and two plano lenses), tightening screw