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INTERPRETING RESULTS: (See manual for more details)

TWO endpoints of 0.3 log unit or greater in the same eye suggests a defect (Always perform two or more tests to verify endpoint)
Defects (greater 0.3 and within 0.3)

  • 0.3 OD and 0.3 OD = Defect OD; repeat to confirm

  •  0.3 OS and 0.3 OS = Defect OS, repeat to confirm

  • 0.9 OS and 1.2 OS = Defect OS, repeat to confirm
     

Error (opposite eyes or 0.6 or greater same eye)

  • 0.6 OD and 0.9 OS

  • 0.6 OS and 0.0 OS, etc.

Normal. (no greater than 0.3 from 0.0)

  • 0.3 OD and 0.0 OS

  • 0.0 OD and 0.3 OS

  • 0.3 OD and 0.3 OS

  • 0.0 OD and 0.0 OS

Parity Challenge option confirms and amplifies the defect.  Example: For a 0.3 OD DEFECT, adding the 0.9 Parity filter to OD yields  "1.2 defect OD" endpoint.  Adding the same 0.9 filter to OS yields "0.6 Defect OS" endpoint.  The difference between these two test scores is twice the value of the DEFECT:  1.2 log OD (side of the defect) -  0.6 log OS (opposite side) = 0.6 OD, twice the 0.3  DEFECT OD.  Useful in confirming a small defect.  The Parity Challenge endpoints are automatically displayed on the Results page as spectalces with the appropriate right or left lens darker, indicating the side of the parity filter.