My ds - 20 months old - frequently gets a sticky eye. It usually clears up after a few days of bathing it in boiled water. Occasionally we use eye drops. Often happens in conjunction with a cold.
A friend of mine said the same had happened to her son and he was eventually diagnosed with a blocked tear duct and had an operation to correct it. Has anyone had the same and when did you go to the GP about it? Don't like to bother the GP if it's an unlikely scenario, and ds will grow out of it anyway.