Is the Fuller OX3227 good for sports?

It is designed for active use. The Unobtainium earsocks and Three-Point Fit hold the frame in place, and the high-wrap shape covers more of the eye area than a flat frame.

What is the difference between the 53 and 55 sizes?

The numbers are the lens width in millimeters. The 55 is the larger of the two, so it suits wider faces and gives a bit more coverage.

Can I put prescription lenses in it?

Yes, it is an optical frame. The high wrap can limit which lens types work well, so ask your optician about wrap-compatible lenses and edge thickness.

Does it come with lenses?

It is sold as a frame. The clear 93% light transmission figure refers to clear lens material, not a included prescription lens.

How does it compare with the Oakley Fuller's other versions?

The OX3227 is the full-rim alloy version with a rectangular 6B shape. Other Fuller variants differ in rim style and material, so check the model number if you want this exact look.