Application of digital signal processing in ophthalmic research: a new horizon in biomedical engineering

Electrooculography (EOG) is widely used in ophthalmic research and clinical laboratories because it provides a non-invasive method for recording the full range of eye movements. One drawback of EOG is that the signal contains more artefacts consisting of powerline (50 Hz) interference and potentials from muscles. In the scheme developed by the authors, the EOG signal and the noise signal are simulated through software as well as hardware. The design and software realisation of a filter suitable for reducing noise in the EOG without corrupting the ocular information is developed. The noisy EOG signal is processed using a specially designed digital filter so that the original EOG signal is recovered, thus satisfactorily proving the working of the new scheme devised by the authors.