Boundary: Bleed area may not be visible.
by Annabella Bluesky/science Photo Library
$41.95
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Colour Blindness Test #10 iPhone case by Annabella Bluesky/science Photo Library. Protect your iPhone with an impact-resistant, slim-profile, hard-shell case. The image is printed directly onto the case and wrapped around the edges for a beautiful presentation. Simply snap the case onto your iPhone for instant protection and direct access to all of the phone's features!
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Colour blindness test. Cards that are used to check for red-green colour blindness. The Ishihara test, which uses pseudoisochromatic plates, is the... more
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3 - 4 business days
Protect your with an impact-resistant, slim-profile, hard-shell case. The image is printed directly onto the case and wrapped around the edges for a beautiful presentation. Simply snap the case onto your for instant protection and direct access to all of the phone's features!
Colour blindness test. Cards that are used to check for red-green colour blindness. The Ishihara test, which uses pseudoisochromatic plates, is the most widely used. These cards depict a pattern of red and green dots. People with normal vision or total colour blindness should not be able to distinguish any number. People with red-green deficiencies should read a number on each card. Colour blindness is usually caused by an inherited genetic defect in the light-sensitive pigments of the eye, but it can be caused by optic injury or nerve diseases. Up to 8% of the male population is affected, and ten times more men have colour blindness than women.
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$41.95
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