For a few months now, I've had a gritty sensation and stinging in my eyes, mainly when I wake up. What might be the cause?
The most frequent cause of stinging and gritty sensation in the eyes is dry eyes. In cases of mild dry eye the symptoms usually clear up by using preservative-free artificial eye drops 3-4 times per day . In cases of moderate dry eye, you may need to increase the frequency of preservative-free artificial tear application, add a lubricant eye gel before going to sleep and adapt the areas where you spend the most time, for example, with the use of humidifiers.