welcome to just answer
kinly give some more information regarding your question-
what eye drops are you using?
any discharge from the affected eye?
Since you have gone offline ad would not be able to give further information, it seems that you might have developed a minor injury or an infection to the affected eye (from the available information)
Ideally, you need to be evaluated by an Ophthalmologist
but in the meantime, you ca try using lubricating eye drops like refresh tears/systane/genteal etc
these are available over the counter and need to be used frequently
at least 6-8 times in a day
these drops will help in the healing of an injury
also, you can use anti-inflammatory eye drops like naphcon/visine. These are again available over the counter
if there is no improvement with the above treatment, then you need to consult an Ophthalmologist for a first hand evaluation and need for antibiotic eye drops.