Contrasting patterns of red and black are classic aposematic warnings that signal would-be predators to “back off, leave me alone … if you do not, you will regret the consequences.”

the need for frequent road resurfacings

The fog has vanished and it's shaping up to be a beautiful day.

If the fixation is wavering, especially when receiving the horizontal afterimage with the centroscope a thin pointer is used by the child to touch the fixation spot.