Refractometer, Ophthalmic

Brand Name: Welch Allyn, Inc.

Display screen may unintentionally flicker due to a software issue. Exposure to flickering lights may induce photosensitive seizure activity in susceptible individuals.

OPD-Scan III Refractive Power/Corneal Analyzer Opthalmic

Software bug was found where there was no difference in Total and Corneal high-order aberrations, but differences were found in Internal high-order aberrations.

Canon Full Auto Ref-Keratometer RK-F2, Catalog Number 6937B002AA.

Canon Inc. had received 17 claims from our foreign sales companies between October to November 2012 that measurement value of RK-F2s refractive power (SPH value) sometimes indicated abnormal value which occurs approximately 5% in probability.

Carl Zeiss Meditec AG VISUREF150 REF 2227-967 - Product Usage: is a diagnostic instrument used to determine the objective refractive values and keratometric cha

Due to the incorrect DC/DC converter being assembled onto the communication board. As a result the effectiveness of the communication board cannot be guaranteed in that the safety function of the board would be insufficient resulting in an increased leakage of current and potentially cause electrical shocks to the user.

AUTO REF/KERATOMETER ARK-1s

There is possibly a difference between the measured dioptric value of the subjective measurement mode and the objective measurement mode on ARK-1s.