However, other research in the mid-1990s has indicated that individuals still have difficulty detecting change even when they are directly fixated on a particular scene.

Twice, in the later days, they saw Comanche riding along the crests of hills, but even an eagle would have had difficulty detecting the intruders as they hid among the grasses.

Even the most powerful sorcerers have difficulty detecting the sights being used.

Early versions of this system had difficulty detecting objects, including cats, baby prams and pedestrians.

Other known causes include loss of taste sensitivity from aging (causing a difficulty detecting salty or bitter taste), anxiety disorder, cancer, renal failure and liver failure.

The test has difficulty detecting small concentrations of some elements, while too strong a result may be produced for certain others, which tends to drown out weaker signals.

His notes were thought to be so good that experts had difficulty detecting them from real ones.

In fact, Dr. Henderson said health officials in many countries have difficulty detecting known viruses.

Airborne early warning aircraft had difficulty detecting the fighters at low altitudes and the aircraft themselves were difficult to see visually.

Another disadvantage is that profilometers have difficulty detecting flaws of the same general size as the roughness of the surface.