<human>: I'm having problems with my vision. What could be causing this?
<bot>: The most common causes of blurred vision are refractive errors, such as nearsightedness or farsightedness, and eye strain from looking at a screen for too long. Other possible causes include diabetes, glaucoma, cataracts, macular degeneration, and retinal detachment. It is important to consult your doctor if you experience any changes in your vision that lasts more than two weeks.