VisionCombineVisionCombine
Baseball Vision Screening

You Can't HitWhat You Can't See.

The average Division I hitter sees better than 20/15. The average MLB hitter sees 20/13. Vision Combine is the first on-field screening platform built to find the visual deficiencies keeping your players from reaching that standard — and connect them with partnered optometrists who can fix them.

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Now taking applications from college programs, travel-ball organizations, and high school baseball programs for the 2026 pilot cohort.

“
“Most of the batter's decisions about whether to swing come from the first 100 milliseconds of information collected by the eyes.”
— Dr. Robert Adair, Yale physicist
The Physics of Hitting

Hitting a baseball is the hardest thing in sports. Vision makes it possible.

From the moment a D-I pitch leaves the hand, a hitter has approximately 400 milliseconds before it crosses the plate. 100 of those are spent just seeing the ball. The rest is decision, swing, and contact — with a margin for error measured in single-digit milliseconds and a fraction of an inch.

400ms
Pitch flight time
D-I fastball, release to plate
100ms
Eye to brain
Window the decision is made in
7–8ms
Swing timing margin
Outside this, the ball goes foul
1/8″
Bat-to-ball precision
Off dead center = weak contact
—

Sources: Adair, R. (Yale). Laby DM et al. The Effect of Visual Function on the Batting Performance of Professional Baseball Players. Sci Rep 9, 16847 (2019). See the full science for citations.

The Business Case

Better team vision is worth up to 1.6 wins per season.

Laby’s 2019 study found hitters in the top 20% of visual ability walked at a rate of 0.091 vs. 0.081 for the bottom 20% (~12% more often). Across 550 at-bats and an average value of 0.33 runs per walk, that’s 1.8 runs per hitter per season — and roughly 1.6 extra wins for a full lineup with better vision than their opponents.

Laby DM et al., Sci Rep (2019); Albert J., Visualizing Baseball (CRC Press, 2018).

Top 20% vision, walk rate
.091
Bottom 20% vision
.081
Extra walks / season
+5.5
Extra runs / season (lineup)
+16
Extra wins / season
+1.6

Built for Everyone in the Game

Vision Combine is a coach-administered screening tool backed by a network of sports-vision optometrists — so every player’s visual system gets measured, and the ones who need care actually get it.

For Coaches & Programs

Screen your entire roster on the field in minutes with an iPad and a phone. Identify players whose vision doesn't meet the standard the game demands \u2014 and get them in front of a partnered optometrist before it costs you games.

  • ✓On-field screening for the whole roster in one session
  • ✓Flag players whose visual system falls short of elite benchmarks
  • ✓Connect players with partnered sports-vision optometrists
  • ✓Track the team’s visual baselines across seasons

For Optometrists

Become the local authority on baseball vision. Receive pre-qualified referrals from coaches, review on-field screening data before the patient walks in, and deliver the professional care that turns marginal vision into a competitive advantage.

  • ✓Qualified, pre-screened patient referrals
  • ✓On-field test data available before the appointment
  • ✓Issue certified reports for recruitment and clearance
  • ✓Join a growing network of sports-vision practices

For Players & Parents

Private lessons and elite coaching can’t fix fundamental flaws in the visual system. Get measured against the standards of college and professional baseball, and learn exactly what to work on \u2014 with a credentialed optometrist who understands the sport.

  • ✓Know where your vision stands vs. D-I and MLB norms
  • ✓Professional eye care from sports-vision specialists
  • ✓Documented results for recruitment profiles
  • ✓Re-measure and track improvement over time

You cannot change what you do not measure.

We’re onboarding a limited number of college, high school, and travel-ball programs into our 2026 pilot. If you’re a coach, optometrist, or program director who wants in, get in touch.

Request Pilot AccessRead the Science