Dynamic Vision Guides

We explain what the ability to see moving targets is, what it depends on, and what to watch out for when measuring it on a screen — with research sources.

01 What Is Dynamic Vision — The Difference Between DVA and KVADVA measures a target passing by sideways, KVA measures a target approaching head-on. Here's what each measures and how it's tested. 02 How Closely Are Static and Dynamic Visual Acuity Related?If your eye chart acuity is good, is your dynamic vision good too? We explain research showing the relationship weakens as speed increases, and the eye's tracking ability that governs dynamic vision. 03 How Much Does Dynamic Vision Matter in Sports and Driving?A straightforward look at research on dynamic vision in baseball, tennis, and martial arts athletes, findings of no difference among elite pros, and studies on driving and accident risk. 04 How Does Dynamic Vision Change With Age — What Research ShowsA study of 826 people aged 5 to 92, comparisons between young and older groups, and research showing exercise slows age-related decline — summarized with sources. 05 How Monitor Refresh Rate and Screen Size Affect Dynamic Vision MeasurementOn a 60 Hz screen, a fast target skips between frames and looks blurred to a tracking eye. We explain how refresh rate, screen width, and brightness change results, with worked examples. 06 From px/s to °/s — How to Calibrate Your Screen and Convert UnitsLearn how to find the real length of 1 px using a bank card's width or your screen diagonal, and how to calculate angular speed and Landolt ring acuity from your viewing distance, with formulas and examples. 07 Does Dynamic Vision Training Work — What Research Shows About Its Potential and LimitsA study reporting improved batting stats after vision training, and another finding no KVA improvement after 8 weeks of training. Here's what you can expect and what to watch for.