I keep getting a sharp pain in my left eye and my vision isn'tas good as it used to be. What's happening to me eyes?

Non-specific issue. Your description is not specific to any particular diagnosis. Any cause of eye surface irritation will cause sharp pain in the eye. I recommend that you see an eye doctor to determine the exact cause of your eye pain.
Corneal pain. Sharp, brief spells of eye pain are most likely due to eye dryness or a recurrent erosion, which is a wound on the surface of the eye that reopens after a poorly healed scratch. If your pain is accompanied by redness, light sensitivity or prolonged blurring, you should see an ophthalmologist.