Well if Professor Campbell thinks the only reason for blinking is the presence of light, he should be tied to a stake with his eyes sewn open in a sandstorm in the middle of the night in the Sahara. Afterall, there will be no need for him to blink.
Whence this hostility?
Prof. Campbell merely posits what I'd say was an interesting enough question (though the babe probably blinks in REM sleep); I don't see that it is partisan one way or another. Prof. Campbell does say "baby" after all, which is something of a giveaway as to his probable opinion on the nature of preborn human life.