The differences between them are very minor and hard to distinguish visually.

Sport rules require an athlete to have both red and blue sets to visually distinguish competitors on the mat.

The position most frequently shown is the leapfrog-or sodomy; these two positions being difficult to visually distinguish.

Tara can be distinguished visually from Kali primarily via her implements.

Layers can be visually distinguished in firn and in ice to significant depths.

How is it possible for a creature to perceive apparent movement, or to distinguish visually between replacement, motion, and change?

By thus visually distinguishing those with us from those gone, the press shows its respect for, or its fear of, death.

They were shown to be able to visually distinguish between different mutations of Drosophila melanogaster.

Brown, which may be difficult to distinguish visually from dark bay, is always accompanied by black points.

For example, some children who cannot read may lack the underlying ability to visually distinguish one alphabetical character from another.