Yes, it is really harmful to your eyes.
You should lift your eyelid and wash your eyes with light brine for more than 15 minutes and see if your eyesight is affected or not. To ensure your eyes are OK, you need to see a doctor who can examine your eyes thoroughly.
Chances are that your eyes may get inflammation and burned, as hydrogen peroxide creates strong chemical reaction with other agents.
It is often used as disinfectant and antiseptic in lower concentration , so you can see how dangerous it is, not to mention how poisonous and unstable it is when in high concentration.