About driver’s sight

The eyesight of drivers who are required to drive safe

Visual information while driving a car is directly related to safety. The range (field of view) that the driver can see without moving their eyes is about 5 degrees from the gaze point. The field of vision consists of a clearly visible central area and a dimly visible peripheral area, and the area that is clearly visible narrows as speed increases. At 130 km/h, the field of view is one-third of what it is at 40 km/h, and the ability to recognize road shoulders is greatly reduced. While driving, it is necessary to have visual acuity that is different from normal vision (static vision), such as visual acuity to see things in motion, sense of perspective, and sense of distance.

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What is Dynamic Vision?

Dynamic visual acuity can be divided into the following two categories.
● KVA dynamic visual acuity: Ability to identify forward and backward motion (e.g. looking at road signs when driving)
● DVA dynamic visual acuity: Ability to identify lateral movement (E.g: Follow the movement of the car with your eyes)

Dynamic vision is very important when driving a car.

Dynamic visual acuity declines with age.

Dynamic visual acuity declines with age, so a dynamic visual acuity test is conducted as one of the driving aptitude tests in the senior citizen course required when renewing a driver's license for those aged 75 and over. If you drive a car, we recommend that you measure your dynamic visual acuity once.

Deep Vision

"Deep vision" may be an unfamiliar word. It is different from normal vision, and is the ability to perceive the most advanced stereoscopic vision (perspective, stereoscopic, and distance) among binocular vision (seeing things with left and right eyes). This "deep vision" is a very important ability to accurately grasp the distance between the front, rear, left and right vehicles and the distance to obstacles when driving a car. When acquiring or renewing a driver's license for a large or class 2 vehicle, it is compulsory to pass this deep vision test.

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There is a possibility that you pass the test using glasses made properly with the binocular vision test.

Visual acuity is not accurate

Lack of accurate binocular vision

Unfamiliar with depth vision tests

Other causes

Correct visual acuity test and binocular function test

Correct binocular function test

Gain tips and tricks through experience with inspection equipment.

Please contact us as there are many factors to consider.

Large-size, class 1 license

Medium-sized, class 1 license

Towing license

Class 2 license

Left and right monocular visual acuity: 0.5 or more

Binocular visual acuity: 0.8 or more

Deep vision: Average error of 2 cm or less after 3 tests with a depth perception tester using the three-rod method.

Binocular vision test, dynamic visual acuity test, deep vision test, and other consultations are available.

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