kva icon

3 ways to improve Dynamic and Kinetic visual acuity

               

2020/04/26

Kinetic visual acuity is the second most important factor for athletes after physical and mental.

The training methods for kinetic and dynamic visual acuity are introduced below.

What is dynamic and kinetic visual acuity?

Visual acuity is classified into static visual acuity and dynamic visual acuity.

Static visual acuity is the ability to see a still object.
The visual acuity test using the Landolt ring, which is performed in medical examinations, tests the static visual acuity.

Dynamic and kinetic visual acuity is the ability to see moving objects.

Dynamic visual acuity Vertical and horizontal vision
Kinetic visual acuity Depth vision
Dynamic visual acuity and Kinetic visual acuity differ greatly in the mechanism of the brain that they perceive. Therefore, the training method is also different.

Sports Vision

There is sports vision as a classification method of visual acuity.

According to the Sports Vision Association, sports vision is classified into the following 8 items.
In particular, in baseball hitting, Kinetic and Dynamic visual acuity are most important.

1.Static vision

Sight to see what is stationary. (Measured by general visual acuity test)

2.Kinetic visual acuity:KVA

Visual acuity for an object that moves in the depth direction.

3.Dynamic visual acuity:DVA

Visual acuity for an object that moves vertically and horizontally.

4.Eye movement

Ability to move the line of sight quickly and smoothly.

5.Contrast sensitivity

Ability to identify subtle differences in brightness.

6.Deep vision (sense of distance)

Ability to recognize relative perspectives.

7.Instantaneous eyesight

Ability to instantly recognize visual information.

8.Eye-hand coordination

Reflexes related to vision.

3 ways to improve Dynamic and Kinetic visual acuity

  1. Dynamic visual acuity training method
  2. Kinetic visual acuity training method
  3. iPhone app to train Kinetic visual acuity

Dynamic and Kinetic visual acuity does not improve just by training the eye muscles. It is necessary to train together with the “brain image processing function”.

However, that does not make the training method more complicated.

All you have to do is create a scene that uses Dynamic or Kinetic visual acuity and repeat the training.

Dynamic visual acuity training method

The most popular method of training Dynamic visual acuity is to read the letters written on the outside signs and telephone poles from the train window.

This training method does not perform vertical training, but it is effective for horizontal training.
The good thing about this training method is that you don’t need to be prepared. You can train any time you are traveling by train.

Kinetic visual acuity training method

A well-known training method for Kinetic visual acuity is to read the numbers or letters written on the thrown ball.

This method of training is very effective, but it also requires tedious preparations and a pitcher to go out with. It is also difficult to control conditions such as ball speed, rotation speed, and rotation direction.

If the ball speed is too fast or the rotation speed is too high, the training will have no effect, and if it is too slow, it will have no effect.

It is said that you can train more effectively by using shutter glasses. Shutter glasses are glasses with a flash effect that open and close the shutter at a high speed with a liquid crystal.

iPhone app to train Kinetic visual acuity

“Kinetic Visual Acuity” is iPhone app that trains Kinetic visual acuity.

iPhone app “Kinetic Visual Acuity”

“Kinetic Visual Acuity” is an iPhone app that trains Kinetic visual acuity, but it is also effective for Dynamic visual acuity.

kva 4

Free and Paid versions

There are Free and Paid versions of “Kinetic Visual Acuity”.

The difference between the free version and the paid version is the presence or absence of advertisement, the difficulty level, and the presence or absence of test mode.

Free version Paid version
With ads No ads
Difficulty level=0~2.5 Difficulty level=0~4
No test mode Test mode available

Free version
Kinetic Visual Acuity

App Store

Free version

Paid version
Kinetic Visual Acuity

App Store

Paid version

How to use

In the paid version “Kinetic Visual Acuity”, you can select “Test mode” or “Training mode”.

In the free version, only “Training mode” is available. The explanation here focuses on how to use the paid version. The usage of the free version is the same as the usage of the “Training mode” in the paid version.

Mode switching

Use the selection box (test / train) in the upper left of the startup screen to switch between “test mode” and “training mode”.

Test mode

Training mode

You can practice by switching to “Training Mode” even during the test.

Training mode

In training mode, you can practice the same level again and again.

It’s easy to use, just select a difficulty level and tap the start button.

The difficulty level is set in the selection box in the upper right.

kva 六角柱

The screen switches by tapping the start button, and a hexagonal pillar will rotate out from the deep inside of the screen.
Scan the number written on the hexagonal pillar.

【About the hexagonal pillar】

The moving speed and rotating speed of the hexagonal pillar are determined by the difficulty level.

The trajectory of the hexagonal pillar changes randomly every time, like baseball pitching.

Enter the read numbers and the result will be displayed.

Result: ◯ All digits correct

Result: △ 1 digit incorrect

Result:× 2 or more digits incorrect

【About check】

The order of the numbers does not matter. If 2124 is correct, both 1242 and 1224 are correct.

Test mode

In Test mode, 5 difficulty levels from 0 to 4 are tested, 5 times each, 25 times in total.

【About the score】

The points that can be added are 4 points for ◯, 2 points for △, 0 points for ☓, and the maximum score is 100 points.

It’s easy to use in test mode, just repeat the test “Tap the start button, read the number on the hexagonal pillar and answer” 25 times. Since it is not a time trial, you can interrupt it on the way.

The difficulty level is set automatically.

kva 六角柱

The screen switches by tapping the start button, and a hexagonal pillar will rotate out from the deep inside of the screen.
Scan the number written on the hexagonal pillar.
(Same as training mode)

Enter the read numbers and the result will be displayed.
(Same as training mode)

Result: ◯ All digits correct
score:4points

Result: △ 1 digit incorrect
score:2points

Result:× 2 or more digits incorrect
score:0points

When the test is complete, your score will be recorded.

Reset test

If you want to cancel the test, you can reset it by tapping the red reset button at the bottom left of the screen.

Score

To check / delete the test score, tap the score button at the bottom right of the screen.

Sound effect on / off

To turn off the sound effect, tap the speaker button at the bottom center of the screen. The sound effect switches on / off each time you tap it.

iPad app to train Kinetic visual acuity

“Kinetic Visual Acuity HD” is an iPad app of “Kinetic Visual Acuity”.

The usage is basically the same as the iPhone app “Kinetic Visual Acuity”, but the score display is quite easy to understand.

Also, in the iPad version, screen transition from the startup screen to the screen where the hexagonal pillar rotates does not occur.

kva PAD icon

iPad app “Kinetic Visual Acuity HD”

kva PAD スクショ3

iPad app
Test mode

kva PAD スクショ2

iPad app
Training mode

App Store

Free version
Kinetic Visual Acuity HD

App Store

Paid version
Kinetic Visual Acuity HD