Abstract:

Video display terminal (VDT) related dry eye, which can impair eye health significantly and has become one of the main clinical subdiseases in Ophthalmology. The pathogenesis of VDT related dry eye is complicated, involving mechanical and non-mechanical mechanisms. The mechanical mechanism is mainly related with the blink movement. It includes the reduction of complete blink, increase of incomplete blink, and increase of ocular surface exposed area.  Non-mechanical mechanisms include ocular surface inflammation, decrease of mucin concentration and lacrimal gland function. The specific examination of VDT related dry eye haven't been elucidated, and the clinical recommendation is to use the questionnaire combined with symptoms and routine dry eye examinations to diagnose this disease.