DIFF Subgroup
A61B 3/036 for testing astigmatism
Introduced: January 1990
Full Title
Full titles differ between systems:
IPC:
Apparatus for testing the eyes; Instruments for examining the eyes > Subjective types, i.e. testing apparatus requiring the active assistance of the patient > for testing visual acuity; for determination of refraction, e.g. phoropters > for testing astigmatism
CPC:
Apparatus for testing the eyes; Instruments for examining the eyes (eye inspection using ultrasonic, sonic or infrasonic waves A61B8/10) > Subjective types, i.e. testing apparatus requiring the active assistance of the patient > for testing visual acuity; for determination of refraction, e.g. phoropters > for testing astigmatism
No child classifications to compare. This is a leaf node in both IPC and CPC.