X-ray of the skull in blue tones on a black backgroundX-ray of the skull in blue tones on a black background
White letters on a black background, as a vision testWhite letters on a black background, as a vision test
X-ray of the skull in blue tones on a black backgroundX-ray of the skull in blue tones on a black background
White letters on a black background, as a vision testWhite letters on a black background, as a vision test