Halloween is just a few days away. Here are some tips about costume contacts and how they can harm your eyes.

Four ways costume contacts can ruin your vision.

1. Scratches- the size of the contact lens is not fitted to your individual eye therefore it can scratch the outside of the eye.

2. Sores-costume contacts can cause corneal ulcers.

3. Both of the above can cause openings into the eye leading to infections.

4. Blindness- In extreme cases, problems from wearing costume contact lenses may lead to blindness or require surgery. For example, scarring from an infection can distort the cornea, requiring a corneal transplant to restore vision.