Which testing method is NOT acceptable for commercial driving in cases of macular degeneration?

The method of using telescopic lenses is not acceptable for commercial driving in cases of macular degeneration because these lenses can limit a driver's ability to have a wide field of vision and the necessary depth perception required for safe driving. Macular degeneration primarily affects central vision, but it may still allow for peripheral vision to remain intact. Since commercial driving requires sharp acuity and the ability to quickly judge distances and perceive movement in surrounding areas, the use of telescopic lenses could impair those functions.

In contrast, other testing methods, like standard vision tests, visual field tests, and contrast sensitivity tests, help assess the driver's overall vision performance and their ability to operate a vehicle safely under normal driving conditions. These tests evaluate various aspects of vision that are necessary for driving, such as clarity, peripheral awareness, and the ability to distinguish objects in different lighting conditions, which are crucial for road safety.