How can Vision be tested? how can color vision be tested?

Answer 1

testing vision is called visual acuity & it is done through Landolt's chart (contains symbols of different sizes & u tell the opening while u sit on a chair 6 metres away), better now by computer; may also b done through neutralizing the red reflex by lenses of different powers till u get the result.
colour vision is tested by Ishihara test; which is a card containing coloured circles; if u colour blind u will mis-read the number formed by combination of circles through contrast colour background

Answer 2

Vision is tested subjectively by using charts having letters or signs of different sizes . Objectively vision is tested by refraction using plane or concave mirror, more acurately with a computer assuming accommodation of lens is taken into cosideration.
Color vision is tested by 1)Homegren`s wools 2) Ishihara`s pseudo iso chromatic charts 3)Edridge Green`s color perception lantern and 4) Nagl`s Enameloscope.

Answer 3

locate out what try is to obtain, locate it & memorize it. i'm blue/eco-friendly & if I remember precise a coloration innovative and prescient try is composed of diverse colored circles that make up basic photos such because of the fact the letter A or a huge sort. in case you do not pass circulate to the labour board, your personell dept. or human centers & fing out if crimson/eco-friendly coloration blindness is a piece in doing all your interest. once you have been employed grew to become into an potential to work out all colorations reported as a call for on your interest? If not then they in all probability can not terminate you out of your place yet while your interest duties replace so now it somewhat is mandatory to work out all colorations then they could would desire to make sufficient provisions so which you will accomplish your interest with your "incapacity", on the grounds that they employed you with this situation. consistent with danger you will get a waiver on your "wellbeing situation"