Computer use definitely can cause evaporative dry eye. While one uses Computer or any gadget, they tend to blink less. Blink releases and distributes the tear components on the eye surface like windshield wiper.  When one blinks less, the tears evaporate and fresh tears are not distributed in normal manner.  The ambient  conditions in a room are also important,  like tempatature and humidity. The air-conditioning is not a true air conditioning and it is a air cooler as it sucks hot air and cools it and pumps in. While hot air is pumped out, it sucks humidity also and it condenses.  Condensed water is thrown out and thus low humidity in the room and cause of dryness. So less frequent blinking and loss humidity are reasons for many young computer hooked, work or play purposes, persons suffer from vague complaints and if ophthalmologist recommends drops use them. Also organize your work or play time on computers.