A case is presented of a @entity1 with @entity1714 who developed vertical @entity892 after decentred laser in situ keratomileusis (LASIK) surgery with associated decompensation of pre-existing @entity5770 into an @entity5770 . A 40-year-old @entity1 underwent LASIK surgery for @entity1714 in his right eye. Preoperatively, he was approximately -26.00/-2.00 x 35 degrees with visual acuity of 6/12(-2) in that eye. He also had an asymptomatic @entity5770 . After LASIK surgery, he achieved a refraction of -3.25/-0.50 x 80 degrees with 6/21 best-corrected visual acuity. He also developed @entity892 . The ablation zone had been decentred upwards and there was also an exo- and hypo-deviation of his right eye. He was able to superimpose the two images in free space with vertical and horizontal prisms.A hard contact lens also resulted in superimposition of the two images. Vertical decentration of the ablation zone can induce a vertical prism effect after LASIK surgery and result in @entity892 . This together with abnormal optics also caused loss of best-corrected vision and decompensation of his pre-existing @entity5770 into an @entity5770 .

XXXX as a complication of laser in situ keratomileusis surgery.

@entity1 :: ('9606', 'Species') :: ['patient', 'man'] @entity892 :: ('MESH:D004172', 'Disease') :: ['vertical diplopia', 'binocular diplopia'] @entity5770 :: ('MESH:D005099', 'Disease') :: ['exotropia', 'exophoria'] @entity1714 :: ('MESH:D009216', 'Disease') :: ['high myopia']
@entity892 :: (MESH:D004172,Disease) :: ['Diplopia']
