| 摘要 |
A headgear includes front and rear sections, a visor, and first and second areas provided on the visor. The visor is disposed in and extending from the front section, and the visor comprises an upper surface and a lower surface. The first and second areas provided on the lower surface of the visor, and the first area and the second area have contrasting optical properties. The first area and the second area may have contrasting colors. Alternatively, the first area and the second area may be provided as two-tone portions. The first area and the second area may meet each other along a middle line dividing the lower surface of the visor substantially by halves. The middle line may be straight. The headgear may further comprise one or more eyesight reference portions disposed on the first or second area. |
