#16 Electro-retinogram: apparatus devised to measure the electric potential of the retina.

Electro-retinogram: apparatus devised to measure the electric potential of the retina.

Terrifying Medical Instruments And Treatment: 50+ Horrible Photos Depicting Treatment Methods From The Past

#16 Electro-retinogram: apparatus devised to measure the electric potential of the retina.

Weird

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