Infra-red radiant intensity exposure safety study for the Eye Tracker

Area of Science:

• Biomedical Engineering
• Ophthalmology
• Medical Device Safety

Background:

• Risk Management (Hazard) Analysis is crucial for biosignal recording devices.
• Eye Tracker Systems measure saccadic eye movements using infrared (IR) light.
• Potential hazards include radiant intensity exposure from IR emitters to the human eye.

Purpose of the Study:

• To determine the radiant intensity exposure of an Eye Tracker System as designed.
• To compare the measured exposure with accepted norms.
• To redesign the Head Mounted Transducer for improved eye safety.

Main Methods:

• Conducted a study to measure radiant intensity exposure from the Eye Tracker's IR emitters.
• Performed mathematical calculations for the initial design and subsequent redesign.
• Evaluated the redesigned Head Mounted Transducer against established radiant intensity exposure standards.

Main Results:

• The initial Eye Tracker design's radiant intensity exposure was quantified.
• A redesign of the Head Mounted Transducer was implemented to mitigate identified risks.
• The redesigned transducer demonstrated radiant intensity exposure levels within accepted safety norms.

Conclusions:

• The redesigned Eye Tracker System's Head Mounted Transducer ensures safe radiant intensity exposure to the human eye.
• Risk Management Analysis is effective in identifying and rectifying potential hazards in biosignal devices.
• This study provides a framework for ensuring the safety of eye-tracking technology.