Wearing the wrong eye power over a long period of time can have several negative impacts on your vision and eye health. Here are a few potential long-term effects:

1. Eye strain: Wearing incorrect glasses or contact lenses can cause eye strain and fatigue. This can lead to headaches, difficulty concentrating, and decreased productivity. Wearing the wrong prescription can cause significant eye strain, leading to discomfort, headaches, and fatigue. Prolonged eye strain can also cause vision problems such as nearsightedness or farsightedness.

2. Vision problems: Over time, wearing the wrong prescription can cause your eyes to work harder than they should, which can lead to changes in your vision. You may experience blurred vision, double vision, or other vision problems.

3. Astigmatism: If you wear glasses or contacts with the wrong prescription for an extended period, you may develop astigmatism. Astigmatism occurs when the cornea of your eye is not perfectly round, causing blurry vision.

4. Amblyopia: Amblyopia, also known as lazy eye, is a condition in which one eye does not develop properly. Wearing glasses with the wrong prescription can cause one eye to work harder than the other, leading to amblyopia.

5. Strabismus: Strabismus, or crossed eyes, is a condition in which the eyes do not align properly. Wearing the wrong prescription glasses or contacts can cause eye muscles to strain, leading to strabismus.

6. Increased Risk of Eye Injuries: Wearing the wrong prescription can also increase the risk of eye injuries, as blurry vision can make it difficult to see obstacles or hazards in your environment.

7. Development of Amblyopia: Amblyopia, also known as "lazy eye," is a condition where the brain favors one eye over the other. Wearing the wrong prescription can cause the brain to ignore the image from one eye, leading to amblyopia and permanent vision loss if left untreated.

8. Progression of Myopia: Wearing the wrong prescription can also worsen myopia, or nearsightedness, by causing the eyes to strain and elongate over time.

Overall, it's important to wear the correct prescription glasses or contacts to avoid these potential long-term effects on your vision and eye health. If you are experiencing any discomfort or changes in your vision, it's best to consult with an eye doctor for an eye exam and proper prescription.