Pink eye. This is in adults almost always viral. No topical antibiotic ointment or drop will prevent it. It is caught, like the common cold, by exposure to material from someone who currently has the condition. Observing cleanliness on your part will help but you cannot avoid touching objects that may have the virus on it when placed there by another.
Home remedy. Just apply neosporin oint on top of eye lids - otc when you go to bed to prevent this.