Going to the eye doctor can be helpful for anyone with blurry vision, but there are a few things optometrists wished their patients wouldn't do. Business Insider reports that they wished people would stop staring at screens all day. They also recommend people stop smoking, because the reduced amounts of oxygen caused by cigarettes constrict blood vessels in the eyes. They also say that contact lenses should not be misused or worn past their expiration date. Keep these tips in mind when taking care of your eyes.