Would it be horrible if i got prescription contact lenses (0.50) but i have perfect eyes sight?

I really really Really need this color and i cant seem to find any other like it on Pinky Paradise, the contact website I'm using to buy them from. The color i want only comes in 0.50 for both eyes. Now i have perfect eye sight. I can still see in not heavily prescribed glasses but not far away. Would it be a horrible idea? Should i look on a different site? Or could this not ruin my eye sight at all and i should just get them?

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