For those of us who want their internet content to reach people at every possible opportunity, the release of Google Glass was another step on the way to blanket internet coverage. However, many people who’ve been trying out Google’s innovative eyewear have found them a bit of a pain.

Some Google Glass users have reported eye strain and headaches after periods of wearing the glasses. According to Harvard optometrist, Dr Eli Peli, who acted as a consultant to Google during the development of Glass, any pain experienced is due to the user looking up for long periods of time.

“The only people who look up a lot are some professionals like electricians and painters. Most of us look either straight or down. It’s well known that up is less comfortable” he said. Dr Peli compared using the Glass for the first time to standing on one leg for a long period of time.

“Try to stand on one leg for a long time and you’ll feel tension, because you’re not using it how it’s normally used. If you’re looking at the Glass for a minute, you’re holding it there for 60 times longer than normal,” he added.

According to a Google spokesman, any discomfort should be short lived: “When anyone gets a new pair of glasses or starts wearing them for the first time there is always an adjustment period until people get used to them. For some, it’s the same with Glass.” The spokesman added, “As we note in our Help Center, Glass is designed for micro-interactions, not for staring into the screen, watching Friday night movie marathons or reading ‘War and Peace’.”