Alright, so I went to the local flyshop to get some materials this weekend to tie Barr's Web wing caddis. First couldn't find web wing, so I will have to order that. Second, bought some size 12 dry fly hooks but didn't realize until I got home that they were straight eyes (fortunately that is what the pattern called for...but it was purely an accident).

My question is what does the straight eye do differently than a down-turned eye? Thanks.