How good is an eye exam at wal-mart?

You get what you pay. Consider the employment decisions made by a graduate of an optometry trade school. Should i set up my own office? Work with another optometrist? Oh gosh, no one will have me so i guess i will work for wal mart. So you get the inadequate exam that an optom gives anyway, from the least consequential of them. You could see an ophthalmologist - right?
What do you expect. Wal-mart is a great place to buy products that are made in factories. It is not a great place to get healthcare, including eye care.