My daughter knows her shapes, letters, numbers, can count to ten....but she cannot name her colors....not any of them except an actual orange fruit, but if something is pink, she might call that orange too. I am not colored blind and neither is my husband, but my dad is. How is testing done and how early can it be done.
2006-12-09 12:08:38 · 3 answers · asked by circusdejojo 3 in Health ➔ General Health Care ➔ Other - General Health Care
Yes, if she knows her numbers, that is how the test is done.
2006-12-09 12:13:02 · answer #1 · answered by Anonymous · 0⤊ 0⤋
Yes, she can. I've tested under-two's where there was need.
Knowing numbers is not necessary, though it is convenient.
The most common Ishihara tests with images made up of variously coloured dots, as well as numbers, have "path tracing" pages where a line can be followed by a finger, if it can be seen.
The City University colour test again requires no naming but just pointing, choosing which of four coloured dots "looks most like the one in the middle" It also looks for the tritan type defect which, although rare, is more common in females than males.
Colour vision defects are relatively uncommon in females, compared to the incidence in males.
2006-12-09 12:24:30 · answer #2 · answered by Pedestal 42 7 · 1⤊ 0⤋
it might be that she just does not knowthe names of colors ye.(I have a daughter about the same age) since neither you nor your husband are colorblind she probably is not colorblind.
However a test can be done at the optometrists office(if your daughterwill sit still long enough to cooperate) 2.5 is still a little young to test unless the child can sit still and know the difference between right and left.
2006-12-09 14:06:04 · answer #3 · answered by Anonymous · 0⤊ 0⤋