Pro, no! Customers who forked out $3,500 for the Apple Vision Pro headset are already returning the devices, claiming they cause eye strain, headaches and motion sickness. More than 200,000 pairs of the groundbreaking goggles were sold during pre-order before being released to the public on Feb. 2. But while some frenzied fans say the Vision Pro will revolutionize the tech industry, other peeved purchasers are already returning theirs to the Apple Store. Some cited extreme headaches as the reaso...