Considering the length of time the average user spends working on a laptop, screen quality is a factor worth taking into cognizance when buying a laptop. The harsh glare from grainy laptop screens may pre-dispose users to side-effects as constant staring at the screen may result in redness, itching and blurring of the eyes, or headaches and migraines, in extreme cases.
Touch-screen laptops, many of which are glossy, may also not be a good choice as these throw back a lot of reflections, thereby putting the eyes under considerable strain. Closely related to this, you must consider the resolution of the laptop before making the buying decision. If you fall into the class of heavy users who work on their laptop for upwards of eight hours in a day, it is more advisable to go for a High Definition (HD) screen with resolution of 1600 x 900 or high