One of the electrode is mounted on the contact lens and the other is placed to the skin adjacent to the outer cornea of the eye.(a) True(b) FalseThis question was posed to me during an online interview.I'm obligated to ask this question of Catheterization Laboratory Instrumentation topic in section Patient Monitoring System of Biomedical Instrumentation

One of the electrode is mounted on the contact lens and the other is p

1.	One of the electrode is mounted on the contact lens and the other is placed to the skin adjacent to the outer cornea of the eye.(a) True(b) FalseThis question was posed to me during an online interview.I'm obligated to ask this question of Catheterization Laboratory Instrumentation topic in section Patient Monitoring System of Biomedical Instrumentation
Answer» The correct option is (a) True To ELABORATE: True, ERG potentials can be recorded with a PAIR of electrodes. One of the electrodes is mounted on a contact lens and is in DIRECT contact with the cornea and the other electrode is placed on the skin adjacent to the outer corner of the eye as it is found that an electrical POTENTIAL exists between the cornea and the back of the eye. This potential changes when the eye is illuminated. A reference electrode MAY be placed on the forehead.

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