Do you have to wear eyewear while tanning in a tanning bed?

I know the shop tells you you have to but that is to save their butts if anything happens. But I dont want raccoon eyes so I would rather not wear them every time.
Update: I tan in a high pressure bed, there are uv a rays but no uv b rays, it is impossible to burn in this bed. So it is differnet than a normal tanning bed.
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