Red eyes

On Saturday, I woke up with a dry eye. Didn't look at the mirror, just assuming that lack of sleep is the cause of it. Went to work and by lunch time, the condition became better. On Sunday, again I woke up with a dry eye. When I look at the mirror, I saw my eyes red and it felt dry. Even my pastor noticed it when she spoke to me. After church service, I went home and look at my home medical supplies to see whether there's any eye drops that I can use. I normally use Eye-Mo or Optrex as these are the more popular ones in the market. Unfortunately there is none in the first aid kit. In the evening, we went to the shopping centre nearby and bought one eye drops. Now my eyes are much better and improving.