Contact lenes question

Hi folks,

I am planning to buy 2 boxes of 90 days daily contact lens in Costco but I have several questions regarding the return/refund policy.

My eye is a bit sensitive and not use contact lens that often, I have never bot prescription contact lens in costco before and what if after I purchased it and I don't feel comfortable after 1 or 2 times. Could I return it to Costco and get the refund?