Cleaning and Disinfecting Information
About
Hansen Ophthalmic Development Lab was a third generation family owned business established in 1954. We manufactured and sold the Burian-Allen ERG Electrode used by medical research and diagnosis facilities around the world for 71 years. As of January 1, 2026, Hansen Ophthalmic Development Lab will officially close following the retirement of Jeff Hansen
Burian-Allen ERG Electrode
Two models:
Unipolar (original design)
Bipolar (Lawwill modification: A.J.O. Vol. 51, No. 6, June 1966)
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Left to right: Large Adult, Adult, Pediatric, Infant, Small Infant, Special Small Infant, Large Premature Infant, Premature Infant
Electrode Sizes
Large Adult 25.0 x 24.0 mm Item Number: 303-20LA
Adult 22.0 x 21.0 mm Item Number: 303-20A
Pediatric 21.0 x 20.0 mm Item Number: 303-20P
Infant 20.0 x 19.0 mm Item Number: 303-20I
Small Infant 18.5 x 18.0 mm Item Number: 303-20SI
Special Small Infant 16.5 x 16.0 mm Item Number: 303-20SSI
Large Premature Infant 14.5 x 14.0 mm Item Number: 303-20LPI
Premature Infant 12.5 x 12.0 mm Item Number: 303-20PI