Long-term eye movement recordings with a scleral search coil-eyelid protection device

The search coil technique is regarded as the gold standard in eye movement recordings. The manufacturers of scleral search coils (SSC) do not recommend using them longer than 30 minutes. The temporal limitations result from potential cornea damage and from irritations of the lid margins and palpebral conjunctiva which subjects perceive as unpleasant. Here we introduce a new coil-eyelid protection device (CEPD) which allows recording intervals up to 2 hours with considerably reduced discomfort. Ophthalmic examinations and saccade recordings were used for comparison with the conventional SSC recording technique. I…