Apple's Vision Pro mixed reality glasses have attracted a lot of complaints from users. Users complain of headaches, nausea and discomfort when using the glasses.

Apple declined to comment on the complaints but referred MarketWatch to its usage guidelines. The company recommends taking short breaks every 20-30 minutes during the period of adaptation to the product, and stopping use in any case of discomfort. The glasses cost $3,500 and went on the market about two months ago in the U.S. and in Europe for $4,000. The device is available for pre-order now on Apple's website and is expected to go on sale later this month in the United States and in select European countries for $5,000 and $6,000 in Europe and $7,500 in Europe. The product is not yet available in the UK or Australia for public release, but Apple has said it is working on a version for the United Kingdom and Australia that will be available later this year. It has not yet been announced in Australia or Canada.