Objective examination of accommodative function of computer vision syndrome

Objective To examine the accommodative function of computer vision syndrome with an objective method. Design Retrospective case series. Participants 58 computer vision syndrome patients who were treated in optometry clinic of Beijing Tongren Hospital. Methods In addition to visual acuity, direct refraction, cycloplegic refraction, spectacles lenses test and subjective accom-modative amplitude test, objective measurement of accommodative function was administered, using the Nidek AA-1 accommodative analyzer of human eyes. Main Outcome Measures Accommodative amplitude, the lag of accommodation and high frequency component(HFC) of accommodative microfluctuations. Results In the subjective accommodative amplitude test, the amplitude of accommodation in 24 out of 58 cases(41.38%) were reduced. In the objective accommodative function test, accommodative dysfunction happened in 41cases(70.69%) in which, accommodative lag was detected in 10 cases(17.24%); HFC of accommodative microfluctuations increased in 14cases(24.14%), including 11 cases(18.97%) with accommodative strain and 3 case(5.17%) with accommodative spasm; 17 cases(29.31%)was found with the accommodative lag combined with increasing HFC, including 14 cases(24.14%) with accommodative lag and accom-modative strain and 3 cases(5.17%) with accommodative lag and accommodative spasm. Conclusion This small sample retrospective case series shows that most of computer vision syndrome patients have accommodative dysfunction, in which is the accommodative lag and accommodative strain is most common.