Vision training seen as critical at NFL Combine

The draft prospects displaying their talents at the NFL scouting combine this week have worked on their sprint times and strength, their agility, and even their answers to interview questions.

In recent years, though, some training sites have added an element of preparation that focuses on attributes outside of the muscles that power running, jumping, and tackling.

At IMG Academies in Bradenton, Fla., David Da Silva works on improving how athletes use their eyes and speeding up the process that turns what they see into action.

"The greatest athletes in the world, they see things faster, quicker, and make decisions better than others," said Da Silva, who leads IMG's vision training program. "We're talking about split-second differences that can be obtained."

The drills, including some adapted from training for fighter pilots, often leave prospects rubbing their eyes from the exertion of a visual workout.

"We are helping the eye muscles be more efficient," and helping the brain's visual cortex respond faster, Da Silva said.

IMG is one of only a handful of sites that teach such techniques, he said. Players such as Boston College linebacker Luke Kuechly, Texas A&M quarterback Ryan Tannehill, and Rutgers wide receiver Mohamed Sanu have been training there in anticipation of the draft.

One training technique originated after World War II, when the military showed pilots brief images of aircraft silhouettes, Da Silva said. The airmen had to quickly determine from the shape whether the plane was an enemy or friendly.

It's only relatively recently, Da Silva said, that such methods have migrated to sports. At IMG, players look through a tachistoscope, a device that quickly flashes a series of images, each containing a number.

The backgrounds and colors change - maybe in one flash the numbers are on a ball, in another the digits are on an image of a football player - and players have to write down the numbers they see. The 10 flashes show up for as little as .13 seconds each, and appear on a 35- to 40-inch television screen, forcing the players' eyes to cover a wide area.

The challenge is to find, identify, and process the information.