I'm a bit of a Rippetoe disciple myself, I know over the past decade people have come to disagree with more of his approaches, but if I'm worried about my vision I pick a spot on the ground about 6ft forward. to look at when squatting. In actuality, I end up seeing myself in the mirror more often than not, watching to see myself hit parallel, but when I'm on my A game i absolutely do not look up on squats or deads.
there are many different schools of thought on the subject but I always consider the natural shape of the spine, body, levers etc. this goes back to my USAW oly lifting seminars/classes/certs.
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I cringe when I see the neck twisted up, personally. I"m not saying I'm right, just personal preference/opinion.
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