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Clear skirt doesn't provide any extra field of vision. It does allow for some perception of motion/light off to the sides but you really can't "see" anything. I find it distracting. Most photographers prefer black skirt masks to eliminate glare and distraction.
Get a good, low-volume mask in black and you'll be fine. Personally I use and recommend the Atomic Frameless. Widest field of vision of any standard mask.
You can read my mini-review of this mask here:
Atomic Aquatics Frameless Mask at www.DiveSeekers.com