VT40
PHOROPTER(VISION TESTER)
•Specifications:
Sphere powers range:
+16.75D to -19.00D, Step: 0.25D
Cylinder power range:
Concave(-) range: 0 to –6.00D,
Convex(+) range: 0 to +6.00D (optional),
0 to –8.00D with addtional lens of –2.00D
Astigmatic axis scale: 0 to 180° in 5° steps
Cross cylinder:
±0.25D
Rotary prism: 0 to 20ΔD in 1ΔD step
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