Moisture chamber seal.

[Milo007]

There would always be some gaps with the commercially manufactured moisture chamber glasses because everyone has different 3-D facial contours and it's very unlikely that the design of the eyecups would match one's facial features perfectly. But that doesn't mean that the tiny gaps would make the thing useless. From my personal experience I can say that the ziena nereus doesn't provide a perfect seal around my orbits yet it significantly blocks air drafts and reduces the rate of evaporation of my tears. So ideally you should get a model of MCG that would be the closest to a perfect fit. Depending upon your location you may order 2-3 different frames and put on them to see which provides the best fit. If you are outside US I would advice you to go for nereus if you don't have a small face. Unfortunately I don't have experience with tranquileyes.

[Matt0029]

With moisture chamber seal glasses is it highly unlikely that the seal around the glasses will be in full contact with you face without any gaps? I have just purchased some tranquileyes glasses and the gasket isn't fully in contact with my face all the way around.