Ask an Eye Doctor and Get an Answer ASAP
How old are you? How tall are you? How much do you weigh? Can you tell me more about it? Any other symptoms? Blurry distant sight or nearby sight? Vision loss? Does anything make it better or worse? Painful? Itch? Are you aware of anything which might have triggered it? Any surgeries? Any medications including over-the-counter pills and herbs? Any family medical history?
You might make the cornea damaged touching on it. You should see an eye doctor to have exam. Usually cornea regenerates on its own although it takes time.
How old are you? How tall are you? How much do you weigh? Do objects appear crooked or distorted? Sensitive to light? Red eye? Spots or strings floating in field of vision? Swelling around the eye? Is it getting worse?
It could be due to the pressure of the cornea because you are sleeping on it. Then you touched it, which might make it worse. Since you don't have any other symptoms I asked, other causes are less likely.