<prompt> What causes pseudoproptosis-HyperthyroidismOptic nerve gliomaHigh myopiaOrbital pseudotomour  <response>: Ans. is c i.e., High myopia Pseudoproptosis the false impression of proptosis may be due to facial asymmetry, enlargement of the globe e.g. high myopia or buphthalmos, lid retraction or contralateral enophthalmos. 