Abstract: The present invention relates to the use of a pharmaceutical composition comprising a pyrethroid compound for inhibiting unwanted eye movement and for treating eye movement disorders, such as, but not limited to, nystagmus. The invention is directed to methods for treating unwanted eye movement and eye movement disorders by administering a pharmaceutical composition comprising a pyrethroid compound that is lambda cyhalothrin or an analog thereof, through topical administration of the composition or incorporation of the composition into a contact lens or an ocular device for implantation into the eye. It further provides for pharmaceutical compositions for the treatment of eye movement disorders and methods of preparing them.