Vision Frame

Vision Frame
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SpongeBob In Vision 7 3 in 1 Digital Photo Frame NEW    US $34.95

NPower in Vision 7 Digital Photo Frame SpongeBob NEW    US $29.99

DIEGO DORA In Vision 7 Digital Photo Frame NEW    US $34.95

Dora Diego In Vision 7 Digital Photo Frame NEW    US $29.99

Npower In Vision 7Digital Photo Frame Dora Diego NIB    US $14.99

NEW Npower Go Diego Dora 7 LCD Digital Photo Picture Frame NICKJR In Vision    US $39.95

Brand New In Vision 7 digital photo frame w Dora and Diego    US $49.95

NIB In Vision Nickelodeon 7 Digital Photo Frame    US $44.99

NEW NPOWER IN VISION DORA DIEGO 7 IN DIGITAL PHOTO FRAME NEW IN BOX    US $27.99

Npower In Vision 7 Nickelodeon Digital Photo Frame NEW    US $28.49

7 SpongeBob In Vision NDF6052 SB 128MB Widescreen Digital Photo Frame EB 004    US $44.95

NEW NPOWER IN VISION DORA DIEGO 7 IN DIGITAL PHOTO FRAME NEW IN BOX    US $9.79

How can I test how glasses affect peripheral vision?

Me and my friends are wanting to test the percentage of peripheral vision you don't have when you're wearing glasses. We want to make a link between glasses frames size and peripheral vision percentage loss. How can we do this? Constructive answers please.

Have several different subjects who have about the same bad vision and two places on either side of the subject where someone will walk without warning. When the subject sees them, have them raise their hand, and measure how long the person walked in ther peripheral before the subject noticed them.
Do this with various frame sizes.