Try this is for lenses contact but it might work:
How to Convince Your Parents to Let You Get Contact Lenses
A lot of people prefercontacts to glasses. Unfortunately, your parents may disagree.
Steps
1. Research contact lenses. They actually might not suit you, so do your research!
2. If you still want them, show your parents both the good and bad sides of contacts.(It's better if you save the best for last!) This proves your willing responsibility.
3. Explain how contacts can be good for you personally. For example, "I play sports a lot" or "glasses are uncomfortable".
4. Be prepared for your parents to make check up on your commitment. For example, they'll want to know if you are following the doctors recomendations.
5. Tell them where you can get contacts,near your house.
6. Understand how to take good care of your lenses.
Tips
* Find out their concerns, focus your efforts on resolving them.
* Be patient, especially if you are their first child...it may take time for them to consider your request.
Warnings
* Remember to keep your promises.
* Do not go behind your parents' back and try to get lenses if they say no. It will only ruin their trust in you for the future. When you need to ask for something like this again, the answer will surely be no.
Things You'll Need
* Internet and/or information on contacts
* Understanding of your families insurance coverage, how much switching to contacts will cost your family.
General advantages and disadvantages
The chart that follows gives the advangates and disadvantages of specific types of lenses. In general, contact lenses:
* offer good peripheral (side) vision
* reduce visual distortion that may occur with some eyeglasses
* do not steam or fog up
* fit an active lifestyle
* improve one's appearance
General disadvantages of contact lenses include:
* they require more daily care than eyeglasses
* some types require a short adaptation period
* you need to return to your optometrist more often for follow-up to maintain eye health
Good luck!!